Tuesday, January 15, 2002

Syrah or Shiraz is a dark-skinned grape grown throughout the world

Syrah or Shiraz is a dark-skinned grape grown throughout the world and used primarily to produce powerful red wines. Whether sold as Syrah or Shiraz, these wines enjoy great popularity.

Syrah is used as a varietal and is also blended. Following several years of strong planting, Syrah was estimated in 2004 to be the world's 7th most grown grape at 142,600 hectares (352,000 acres).

DNA profiling in 1999 found Syrah to be the offspring of two obscure grapes from southeastern France, Dureza and Mondeuse Blanche. It should not be confused with Petite Sirah, a synonym for Durif, a cross of Syrah with Peloursin dating from 1880.

History

Origin
Syrah leaf.

Syrah has a long documented history in the Rhône region of Southeastern France, but it was not known if it had originated in that region. In 1998, a study conducted by Carole Meredith's research group in the Department of Viticulture and Enology at University of California, Davis used DNA typing and extensive grape reference material from the viticultural research station in Montpellier, France to conclude that Syrah was the offspring of the grape varieties Dureza (father) and Mondeuse Blanche (mother).

Dureza is a dark-skinned grape variety from the Ardèche region in France that has all but disappeared from the vineyards, and the preservation of such varieties is a speciality of Montpellier. Mondeuse Blanche is a white grape variety cultivated in the Savoy region, and is still found in very small amounts in that region's vineyards today. Both varieties are somewhat obscure today and have never achieved anything near Syrah's fame or popularity, and there is no record of them ever having been cultivated at long distances from their present home. Thus, both Syrah's parents come from a limited area in southeastern France, very close to northern Rhône. Based on these findings, the researchers have concluded that Syrah originated from northern Rhône.

The DNA typing leaves no room for doubt in this matter, and the numerous other hypotheses of the grape's origin which have been forwarded during the years all completely lack support in form of documentary evidence or ampelographic investigations, be it by methods of classical botany or DNA. Instead, they seem to have been based primarily or solely on the name or synonyms of the variety. Because of varying orthography for grape names, especially for old varieties, this is in general very thin evidence. Despite this, origins such as Syracuse or the Iranian city of Shiraz have been proposed.

The parentage information does however not reveal how old the grape variety is, i.e., when the pollination of a Mondeuse Blanche vine by Dureza took place, leading to the original Syrah seed plant. In the year AD 77, Pliny the Elder wrote in his Naturalis Historia about the wines of Vienne (which today would be called Côte-Rôtie), where the Allobroges made famous and prized wine from a dark-skinned grape variety that had not existed some 50 years earlier, in Virgil's age. Pliny called the vines of this wine Allobrogica, and it has been speculated that it could be today's Syrah. However, the description of the wine would also fit, for example, Dureza and Pliny's observation that the vines of Allobrogica was resistant to cold is not entirely consistent with Syrah.
The name Shiraz

It is called Syrah in its country of origin, France, as well as in the rest of Europe, Argentina, Chile, Uruguay and most of the United States. The name Shiraz became popular for this grape variety in Australia, where it has long been established as the most grown dark-skinned variety. In Australia it was also commonly called Hermitage up to the late 1980s, but since that name is also a French Protected designation of origin, this naming practice caused a problem in some export markets and was dropped. The name Shiraz for this grape variety is also commonly used in South Africa and Canada.

The grape is also known under many other synonyms that are used in various parts of the world including Antourenein Noir, Balsamina, Candive, Entournerein, Hignin Noir, Marsanne Noir, Schiras, Sirac, Syra, Syrac, Serine, and Sereine.

It seems that many of the legends of Syrah's origins come from one of its many synonyms - Shiraz. Since there also is a city in Iran called Shiraz, where the famous Shirazi wine was produced, some legends have claimed that the Syrah grape originated in Shiraz, and was brought to Rhône, which would make Syrah a local French synonym and Shiraz the proper name of the variety.

There are at least two significantly different versions of the myth, giving different accounts of how the variety is supposed to have been brought from Shiraz to Rhône and differing up to 1,800 years in dating this event. In one version, the Phocaeans should have brought Syrah/Shiraz to their colony around Marseilles (then known as Massilia), which was founded around 600 BC. The grape should then later have made its way to northern Rhône, which was never colonized by the Phocaeans. No documentary evidence exists to back up this legend, and it also requires that the variety later has vanished from the Marseilles region without leaving any trace.

In another version, the person who brought the variety to Rhône is even named, being the crusader Gaspard de Stérimberg, who is supposed to have built the chapel at Hermitage. Even before the advent of DNA typing of grapes, there were several problems with this legend. First, no ampelographic investigations of the grapes from Shiraz seem to have been made. Second, it is documented that the famous Shirazi wine was white, ruling out the use of dark-skinned grapes such as Syrah, and no known descriptions of this wine's taste and character indicate any similarity whatsoever with red wines from the Rhône. Third, it is highly doubtful if any crusader would have journeyed as far east as Persia, since the crusades were focused on the Holy Land.

The legend connecting Syrah with the city of Shiraz in Iran may, however, be of French origin. James Busby wrote in Journal of a recent visit to the principal vineyards of Spain and France that the 1826 book Œnologie Française "stated that, according to the tradition of the neighbourhood, the plant [Scyras was originally brought from Shiraz in Persia, by one of the hermits of the mountain".

Since the name Shiraz has been used primarily in Australia in modern time, while the earliest Australian documents use the spelling "Scyras", it has been speculated (among others by Jancis Robinson) that the name Shiraz is in fact a so-called "strinization" of Syrah's name via Scyras. However, while the names Shiraz and Hermitage gradually seem to have replaced Scyras in Australia from the mid-19th century, the spelling Shiraz has also been documented in British sources back to at least the 1830s. So, while the name or spelling Shiraz may be an effect of the English language on a French name, there is no evidence that it actually originated in Australia, although it was definitely the Australian usage and the Australian wines that made the use of this name popular.
Other legends

Another legend of the grape variety's origin, based on the name Syrah, is that it was brought from Syracuse by the legions of Roman Emperor Probus sometime after AD 280. This legend also lacks documentary evidence and is inconsistent with ampelographic findings.
Rise to fame

The wines that made Syrah famous were those from Hermitage, the hill above the town Tain-l'Hermitage in northern Rhône where there is an hermitage (chapel) on the top, and where de Stérimberg is supposed to have settled as a hermit after his crusades. Hermitage wines have for centuries had a reputation for being powerful and excellent. While Hermitage was quite famous in the 18th and 19th centuries, and attracted interest from foreign oenophiles such as Bordeaux enthusiast Thomas Jefferson, it lost ground and foreign attention in the first half of the 20th century.

In the 18th and the first half of the 19th centuries, most Hermitage wine that left France did so as a blending component in Bordeaux wines. In an era when "clarets" were less powerful than today, and before appellation rules, red wines from warmer regions would be used for improvement (or adulteration, depending on the point of view) of Bordeaux wines. While Spanish and Algerian wines are also known to have been used for this purpose, top Bordeaux châteaux would use Hermitage to improve their wines, especially in weaker vintages.
Arrival in Australia

In 1831, the Scotsman James Busby, often called "the Father of Australian viticulture", made a trip back to Europe to collect cuttings from vines (primarily from France and Spain) for introduction to Australia. One of the varieties collected by him was Syrah, although Busby used the two spellings "Scyras" and "Ciras". The cuttings were planted in the Sydney Botanical Gardens, and in Hunter Valley, and in 1839 brought from Sydney to South Australia. By the 1860s, Syrah was established as an important variety in Australia.
Modern history

Syrah continues to be the main grape of the Northern Rhône and is associated with classic wines such as Hermitage, Cornas and Côte-Rôtie. In the Southern Rhône it is used as a blending grape in such wines as Châteauneuf-du-Pape, Gigondas and Côtes du Rhône, where Grenache usually makes up the bulk of the blend. Although its best incarnations will age for decades, less-extracted styles may be enjoyed young for their lively red and blueberry characters and smooth tannin structure. Syrah has been widely used as a blending grape in the red wines of many countries due to its fleshy fruit mid-palate, balancing the weaknesses of other varieties and resulting in a "complete" wine.´

From the 1970s and even more from the 1990s, Syrah has enjoyed increased popularity, and plantings of the variety has expanded significantly in both old and new locations. In the early 2000s, it broke into the top 10 of varieties planted worldwide for the first time.
Syrah wines
A glass of California Syrah.

Syrah is widely used to make a dry red table wine, which can be both varietal or blended. Four main uses can be distinguished:

* Varietal Syrah or Shiraz. Of the better-known wines, this is the style of Hermitage in northern Rhône or Australian Shiraz.
* Syrah blended with a small amount of Viognier. This is the traditional style of Côte-Rôtie in northern Rhône.
* Syrah as a roughly equal blending component for Cabernet Sauvignon. In modern times, this blend originated in Australia, so it is often known as Shiraz-Cabernet.
* Syrah as a minor blending component for Grenache and Mourvèdre. This is the traditional style of Châteauneuf-du-Pape of southern Rhône, and this blend is often referred to as GSM in Australia.

Smaller amounts of Syrah are also used in the production of other wine styles, such as rosé wine, fortified wine in Port wine style, and sparkling red wine. While Australian sparkling Shiraz traditionally have had some sweetness, a number of Australian winemakers also make a full-bodied sparkling dry Shiraz, that contains the complexity and sometimes earthy notes that are normally found in still wine.

Due to their concentrated flavours and high tannin content, many premium Syrah wines are at their best after some considerable bottle aging. In exceptional cases, this may be 15 years or longer.

Syrah has one of the highest recommended wine serving temperatures at 65 °F (18 °C).
Taste and flavours

Wines made from Syrah are often quite powerfully flavoured and full-bodied. The variety produces wines with a wide range of flavor notes, depending on the climate and soils where it is grown, as well as other viticultural practices chosen. Aroma characters can range from violets to berries (usually dark as opposed to red), chocolate, espresso and black pepper. No one aroma can be called "typical" though blackberry and pepper are often noticed. With time in the bottle these "primary" notes are moderated and then supplemented with earthy or savory "tertiary" notes such as leather and truffle. "Secondary" flavor and aroma notes are those associated with several things, generally winemakers' practices (such as oak barrel and yeast regimes).
Syrah or Shiraz on labels

The Syrah-dominated appellations (AOCs) of northern Rhône have, like most other French appellations and regions, no tradition of varietal labelling of their wines. Indeed, such practices are generally disallowed under AOC rules, and only the AOC name (such as Cote-Rotie, Crozes-Hermitage or Hermitage) appears on the label. Varietal labelling of Syrah/Shiraz wines is therefore a practice which has emerged in the New World, and primarily in Australia.

To confuse matters, in northern Rhône, different clones of genuine Syrah are referred to as Petite Syrah (small Syrah) or Gros Syrah (large Syrah) depending on the size of their berries, with Petite Syrah being considered the superior version, giving wines higher in phenolics.

As a general rule, most Australian wines are labelled Shiraz, and most European wines (from such regions where varietal labelling is practiced) are labelled Syrah. In other countries, practices vary and winemakers (or wine marketers) sometimes choose either Syrah or Shiraz to signify a stylistic difference in the wine they have made. "Syrah"-labelled wines are sometimes thought to be more similar to classic Northern Rhône reds; presumably more elegant, tannic, smoke-flavoured and restrained with respect to their fruit component. "Shiraz"-labelled wines, on the other hand, would then be more similar to archetypical Australian or other New World examples; presumably made from riper berries, more fruit-driven, higher in alcohol, less obviously tannic, peppery rather than smokey, usually more easily approached when young, and possibly slightly sweetish in impression. It must however be realized that this rule of thumb is unevenly applied.
Syrah in different countries

Syrah is a variety that during the last few decades has been imported for cultivation in several countries. It is primarily grown in warmer regions. Worldwide plantations of Syrah have increased considerably in the late 1990s and early 2000s, and both Syrah-labelled and Shiraz-labelled wines are on the increase.

It is grown in many wine producing regions around the world, with concentrations in Australia, The Rhone Valley in France, and the US. It is often used as a blending grape in Spain and Italy as well. It is also planted in Portugal, which favor making varietal Syrah wine, and not only blending with other types.
France

Syrah, as it is known in France, is grown throughout the Rhône valley. The wines that are made from it vary greatly, even over small changes in the vines locations. The differences in the soil quality as well as the changes in the slope of the terrain tend to produce different styles of wine. Ranging from the mineral and tannic nature of Hermitage, to fruity and perfumed in the case of Côte-Rôtie.

Syrah is also a key component to many blends. It may be used to add structure and color to Grenache in southern Rhône blends, including Côtes-du-Rhône and Châteauneuf-du-Pape. Syrah is also the only red grape used in the wines of the northern Rhône.

In 1968, there existed only 2,700 hectares (6,700 acres) of Syrah vineyards in France, primarily in the traditional appellations of northern Rhône, which at that time had not received much attention in the wine world for several decades, and the vineyards of which were not planted to full capacity. After the wines of northern Rhône were "rediscovered" by wine writers in the 1970s, plantings expanded considerably. This trend received an extra boost in the 1980s and 1990s, when influential wine writer Robert M. Parker, Jr. started to award very high scores, up to the "perfect" score of 100 points, to wines of some Rhône producers. The popularity of Australian Shiraz on the export market may also have played a role. 1988, total French plantings stood at 27,000 hectares (67,000 acres), and the 1999 viticultural survey found 50,700 hectares (125,000 acres) of Syrah vineyards. France thus has the world's largest plantations of Syrah.

While previously unused parts of the northern Rhône vineyards have been planted with Syrah as part of the expansion, the major part of the new French Syrah plantations are located in southern Rhône (which covers a much larger vineyard area than the northern part) and Languedoc-Roussillon. While southern Rhône produces relatively few wines where Syrah is in the majority, the proportion of Syrah in the blended wines of this region has been on the rise. Languedoc-Roussillon uses Syrah to produce both Southern Rhône-like blends with Grenache, Australian-style blends with Cabernet Sauvignon, and varietal Syrah.
Australia

The Syrah grape was introduced into Australia in 1832 by James Busby, an immigrant who brought vine clippings from Europe with him, and it is almost invariably called Shiraz. Today it is Australia's most popular red grape, but has not always been in such favor; in the 1970s, white wine was so popular that growers were ripping out unprofitable Shiraz and Grenache vineyards, even those with very old vines. Many factors, including the success of brands like Lindemans (part of Foster's Group) and Jacob's Creek in the UK, as well as Rosemount in the US and UK, were responsible for a dramatic expansion of plantings during the 1980s and 1990s; a similar trajectory occurred in California. However, the biggest factor in this expansion during the 1990s was a federal government tax subsidy to those planting new vineyards.

In the 2005-2006 growing season, total Shiraz plantations in Australia stood at 41,115 hectares (101,600 acres), of which 39,087 hectares (96,590 acres) were old enough to be productive. These vines yielded a total of 422,430 tonnes of Shiraz grapes for wine production. Shiraz is thus the most planted variety in Australia. Australia thus has the world's second largest plantations of Syrah/Shiraz, after France.

Victorian regions include Heathcote, roughly 1.5 hours north of Melbourne. Cooler climate regions such as Western Australia's Margaret River produce Shiraz with marginally less alcohol content and often in a more traditional French style.

A well known example of the Shiraz grape in Australian viticulture is the Penfolds "Grange". This wine was created by winemaker Max Schubert in 1951, and has a reputation of aging well. The Penfolds Grange is predominantly Shiraz, but often includes a small quantity of Cabernet Sauvignon. It is usually a multi-regional blend of quality South Australian Shiraz, with the Barossa Valley playing an important role, and matured in new American Oak. Other well known Australian Shiraz wines include, the Henschke "Hill of Grace" and the Penfolds "RWT".

Recently, Australian Shiraz producers have started to add up to 4% Viognier to their Shiraz to add apricot tones to the wine's nose and palate. With such a small percentage added, the producer wasn't obliged to declare the blend on the label. In the past 5 years however, it's becoming increasingly fashionable to label the wine Shiraz Viognier as Viognier gains consumer acceptance in the market place. The practise of blending Viognier with Syrah has actually been common for years in the Northern Rhône Valley region of Cote-Rotie.

Shiraz is also the "S" in "GSM" (Grenache-Shiraz-Mourvèdre), which is common Australian designation for a Châteneuf-du-Pape-like blend.
South Africa

South African plantations have expanded significantly, from 1% of the vineyard area in 1995 to 9.7% in 2007 making up a total area under cultivation of 9,856 hectares (24,350 acres). In South Africa, the variety is predominately known as Shiraz, but the designation Syrah is used for "Rhône-style" wines. Some see this variety as the "great hope" for South African wines.
United States

In the United States, wine produced from the grape is normally called by its French name, Syrah. However, in cases where winemakers choose to follow a New World style, similar to Penfolds Grange, they may choose to label their wines as Shiraz. Under American wine laws, either name may appear on the label. Syrah first appeared as a wine grape in California in the 1970s, where it was planted by a group of viticulturists who called themselves "Rhône rangers." Although most plantings of the grape are in California, there are increasing amounts of it being grown in Washington state.

California Syrahs, much like those in France, vary a great deal based on the climate and terroir that they inhabit. In exceptionally warm regions, such as parts of Napa, the wine is often blended with other Rhône varieties. Other appellations, primarily mountainous ones, tend to produce varietal-based wines that can stand on their own. Syrah was introduced into Washington state in 1985 by the Woodinville, Washington Columbia Winery. Expanding at a significant rate, it is used to produce single varietial wines as well as being blended with grapes such as Grenache, Cinsault, and Viognier.
Argentina

Syrah plantations in Argentina increased from less than 1,000 hectares (2,500 acres) in 1990 to 9,500 hectares (23,000 acres) in 2002. Syrah has occasionally been used as a blending component with Argentina's signature dark-skinned grape Malbec to provide an "Argentinian take" on the Australian Cabernet-Shiraz blend.
Chile

Around 2005, there were 2,500 hectares (6,200 acres) of Syrah in Chile.

Durif

Durif, or Petite Sirah, is a descendant of Syrah and Peloursin. It was propagated by and named after Dr. Francois Durif. Durif is a cross breed between the lesser known Peloursin and Syrah. Regions such as Rutherglen have achieved international regard for their Durif. This varietal is similar to Shiraz, but even more full bodied and tannic because of the smaller, thicker skinned grapes used.

Zinfandel is a variety of red grape planted

Zinfandel is a variety of red grape planted in over 10 percent of California vineyards. DNA fingerprinting revealed that it is genetically equivalent to the Croatian grape Crljenak Kaštelanski, and also the Primitivo variety traditionally grown in the "heel" of Italy, where it was introduced in the 1700s. The grape found its way to the United States in the mid-19th century, and became known by variations of the name "Zinfandel", a name of uncertain origin.

The grapes typically produce a robust red wine, although a semi-sweet rosé (blush-style) wine called White Zinfandel has six times the sales of the red wine in the United States. The grape's high sugar content can be fermented into levels of alcohol exceeding 15 percent.

The taste of the red wine depends on the ripeness of the grapes from which it is made. Red berry fruits like raspberry predominate in wines from cooler areas, whereas blackberry, anise and pepper notes are more common in wines made in warmer areas and in wines made from the earlier-ripening Primitivo clone.

History

Europe (6000 BCE – 1870)

Archaeological evidence indicates that domestication of Vitis vinifera occurred in the Caucasus region around 6000 BCE, and winemaking was discovered shortly after. Cultivation of the vine subsequently spread to the Mediterranean and surrounding regions. Croatia once had several indigenous varieties related to Zinfandel, which formed the basis of its wine industry in the 1800s. This diversity suggests that the grapes existed in Croatia longer than anywhere else. However, these varieties were almost entirely wiped out by the phylloxera epidemic of the late 19th century, reducing Zinfandel to just nine vines of locally-known "Crljenak Kaštelanski" discovered in 2001 on the Dalmatian coast of Croatia.

The first documented use of the term Primitivo appears in Italian governmental publications of the 1870s. The name derives from the terms primativus or primaticcio, which refer to the grape's tendency to ripen earlier than other varieties. This name's appearance 40 years after the first documented use of the term Zinfandel was previously thought to suggest that Primitivo was introduced to Italy from across the Atlantic; however, this hypothesis became unlikely since the discovery of the vine's Croatian origin.

Primitivo is now thought to have been introduced as a distinct clone into the Apulia region of Italy in the 1700s. Don Francesco Filippo Indellicati, the priest of the church at Gioia del Colle near Bari, selected an early ("primo") ripening plant of the Zagarese variety (the name possibly derived from "Zagreb") and planted it in Liponti. This clone ripened at the end of August and became widespread throughout northern Puglia. Cuttings came to the other great Primitivo DOC (denominazione di origine controllata or "controlled denomination of origin") as part of the dowry of the Countess Sabini of Altamura when she married Don Tommaso Schiavoni-Tafuri of Manduria in the late 1800s.
United States east coast (1829 – 1850)

The arrival of Zinfandel in the United States may have been via the Imperial Nursery in Vienna, Austria, which likely obtained the vines during the Habsburg Monarchy's rule over Croatia, after Dalmatia was absorbed when the Venetian Empire fell in 1797. George Gibbs, a horticulturist on Long Island, received shipments of grapes from Schönbrunn and elsewhere in Europe between 1820 and 1829. Sullivan suggests that the "Black Zinfardel of Hungary" mentioned by William Robert Prince in A Treatise on the Vine (1830) may have referred to one of Gibbs' 1829 acquisitions. Webster suggests that the name is a corruption of tzinifándli (czirifandli), a Hungarian word derived from the German Zierfandler, a white grape (Gruener Sylvaner) from Austria's Thermenregion.

Gibbs visited Boston in 1830, and Samuel Perkins of that city began selling "Zenfendal" soon afterward. In 1830, Gibbs also supplied Prince with "Black St. Peters", a similar variety may have come from England, where many vines have "St. Peters" in their names. Little is known about this vine, except that the Black St. Peters that arrived in California in the 1850s was the same as what became known as Zinfandel by the 1870s.
Bottles of Californian Zinfandel and Primitivo di Manduria.

By 1835 Charles M. Hovey, Boston’s leading nurseryman, was recommending "Zinfindal" as a table grape, and it was soon widely grown in heated greenhouses for the production of table grapes as early as June. The first reference to making wine from "Zinfindal" appears in John Fisk Allen's Practical Treatise in the Culture and Treatment of the Grape Vine (1847). Meanwhile the fad of hothouse cultivation faded in the 1850s as attention turned to the Concord and other grape varieties that could be grown outdoors in Boston.
[California (1850 – 1933)

Prince and other nurserymen such as Frederick W. Macondray joined the California Gold Rush in the 1850s, and took Zinfandel with them. Prince's notebook records that the grape dried "perfectly to Raisin" and that he believed his Zinfandel was the same as the "Black Sonora" he found in California. When the vine known as "Black St. Peters" arrived in California, it was initially regarded as a distinct variety, but by the 1870s it was recognized as the same grape as Zinfandel.

Joseph W. Osborne may have made the first wine from Zinfandel in California. He planted Zinfandel from Macondray at his Oak Knoll vineyard just north of Napa, and his wine was much praised in 1857. Planting of Zinfandel boomed soon after, and by the end of the 19th century it was the most widespread variety in California.

These Zinfandel old vines are now treasured for the production of premium red wine, but many were ripped up in the 1920s, during the Prohibition years (1920–1933), but not for the obvious reason. Even during the Prohibition, home winemaking remained effectively legal, and some vineyards embraced the sale of grapes for making wine at home. While Zinfandel grapes proved popular among home winemakers living near the vineyards, it was vulnerable to rot on the long journey to East Coast markets. The thick-skinned Alicante Bouschet was less susceptible to rot, so this and similar varieties were widely planted for the home winemaking market. Three thousand cars (about 38000 t) of Zinfandel grapes were shipped in 1931, compared to 6000 cars of Alicante Bouschet.
[Rediscovery after Prohibition (1933 – present)

By 1930, the wine industry had weakened due to the Great Depression and Prohibition. Many vineyards that survived by supplying the home market were located in California's Central Valley, a non-optimal environment for growing quality Zinfandel. Thus, the end of Prohibition left a shortage of quality wine grapes, and Zinfandel sank into obscurity as most was blended into undistinguished fortified wines. However, some producers remained interested in making single varietal red wines.

By the middle of the 20th century the origins of California Zinfandel had been forgotten. In 1972, one British wine writer wrote, "there is a fascinating Californian grape, the zinfandel, said to have come from Hungary, but apparently a cépage now unknown there." In 1974 and 1981, American wine writers described it as "a California original, grown nowhere else" and "California's own red grape".

In 1972, Bob Trinchero of the Sutter Home Winery decided to try draining some juice from the vats in order to impart more tannins and color to his Deaver Vineyard Zinfandel. He vinified this juice as a dry wine, and tried to sell it under the name of Oeil de Perdrix, a French wine made by this saignée method. The Bureau of Alcohol, Tobacco and Firearms insisted on an English translation, so he added "White Zinfandel" to the name, and sold 220 cases. At the time, demand for white wine exceeeded the availability of white wine grapes, encouraging other California producers to make "white" wine from red grapes, with minimal skin contact. However, in 1975, Trinchero's wine experienced a stuck fermentation, a problem in which the yeast dies off before all the sugar is converted to alcohol. He put the wine aside for two weeks, then tasted it and decided to sell this pinker, sugary wine. Just as Mateus Rosé had become a huge success in Europe after World War II, this medium sweet White Zinfandel became immensely popular. White Zinfandel still accounts for 9.9% of U.S. wine sales by volume (6.3% by value), six times the sales of red Zinfandel. Most white Zinfandel is made from grapes grown for that purpose in California's Central Valley.

Wine critics considered white Zinfandel to be insipid and uninteresting in the 1970s and 1980s, although modern white Zinfandels have more fruit and less cloying sweetness. Nevertheless, the success of this blush wine saved many old vines in premium areas, which came into their own at the end of the 20th century as red Zinfandel wines came back into fashion. Although the two wines taste dramatically different, both are made from the same (red) grapes, processed in a different way.
[Relationship to Primitivo and Crljenak Kaštelanski
A vine of Crljenak Kaštelanski, in the vineyard where it was discovered. The metal tag from the University of Zagreb indicates that this vine is reserved for genetic research.

Zinfandel was long considered "America's vine and wine", but when University of California, Davis (UCD) professor Austin Goheen visited Italy in 1967, he noticed how wine made from Primitivo reminded him of Zinfandel. Others also made the connection about that time. Primitivo was brought to California in 1968, and ampelographers declared it identical to Zinfandel in 1972. The first wine made from these California vines in 1975 also seemed identical to Zinfandel. In 1975, PhD student Wade Wolfe showed that the two varieties had identical isozyme fingerprints.

Dr. Lamberti of Bari had suggested to Goheen in 1976 that Primitivo might be the Croatian variety Plavac Mali. By 1982 Goheen had confirmed that they were similar but not identical, probably by isozyme analysis. Some Croatians, however, became convinced that Plavac Mali was the same as Zinfandel, among them Croatian-born winemaker Mike Grgich. In 1991 Grgich and other producers came together as the Zinfandel Advocates and Producers (ZAP) with the objectives of promoting the varietal and wine, and supporting scientific research on Zinfandel. With this support, UCD professor Carole Meredith went to Croatia and collected over 150 samples of Plavac Mali throughout Dalmatia, in collaboration with the University of Zagreb.

In 1993, Meredith used a DNA fingerprinting technique to confirm that Primitivo and Zinfandel are clones of the same variety. Comparative field trials have found that "Primitivo selections were generally superior to those of Zinfandel, having earlier fruit maturity, similar or higher yield, and similar or lower bunch rot susceptibility." This is consistent with the theory that Primitivo was selected as an early-ripening clone of a Croatian grape.

By 1998, Meredith's team realized that Plavac Mali was not Zinfandel but rather that one was the parent of the other. In 2000 they discovered that Primitivo/Zinfandel was one parent of Plavac Mali. The other parent of Plavac Mali was determined by Ivan Pejić and Edi Maletić (University of Zagreb) to be Dobričić, an ancient variety from the Adriatic island of Šolta.

This discovery narrowed down the search to the central Dalmatian coastal strip and its offshore islands. Eventually a matching DNA fingerprint was found among the samples. The match came from a vine sampled in 2001 in the vineyard of Ivica Radunić in Kaštel Novi. This Crljenak Kaštelanski ("Kaštela Red") appears to represent Primitivo/Zinfandel in its original home, although some genetic divergence may have occurred since their separation. Meredith now refers to the variety as "ZPC" - Zinfandel / Primitivo / Crljenak Kaštelanski.

This Croatian vineyard contained just nine Crljenak Kaštelanski vines mixed with thousands of other vines. In 2002, additional vines known locally as Pribidrag were found in the Dalmatian coastal town of Omiš. Both clones are being propagated in California under the aegis of Ridge Vineyards, although virus infections have delayed their release. The first Croatian ZPC wine was made by Edi Maletić in 2005. Meanwhile, plantings of Primitivo have increased in California, where it seems to grow somewhat less vigorously than its sibling. Its wines are reputed to have more blackberry and spice flavors.
[Legal issues

Local wine-labeling regulations are slowly catching up with the DNA evidence, a process that has been slowed by trade disputes. The European Union recognized Zinfandel as a synonym for Primitivo in January 1999, meaning that Italian Primitivos can be labelled as Zinfandel in the United States and any other country that recognises EU labelling laws. Italian winemakers have taken advantage of these rules and shipped Primitivo wines to the United States labelled as Zinfandels, with the approval of the Alcohol and Tobacco Tax and Trade Bureau (TTB).

As of December 2007, the TTB lists both Zinfandel and Primitivo as approved grape varieties for American wines, but they are not listed as synonyms. U.S. producers, therefore, must label a wine according to whether it is Zinfandel or Primitivo. The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) proposed in 2002 that they be recognised as synonyms, but no decision on this proposal (RIN 1513–AA32, formerly RIN 1512-AC65) has been made.
[Distribution and wines
[United States

Zinfandel is most widely known in the California wine industry, but the grape is also grown in Arizona, Colorado, Illinois, Indiana, Iowa, Massachusetts, Nevada, New Mexico, New York, North Carolina, Ohio, Oregon, Tennessee, Texas and Washington. U.S. producers make wine in styles that range from late harvest dessert wines, rosés (White Zinfandel) and Beaujolais-style light reds to big hearty reds and fortified wine in the style of port. The quality and character of American Zinfandel wines largely depend on the climate and location in which they are grown, the age of the vineyard in which they are grown, and the technology employed by the winemaker.

Historically, California Zinfandel vines were planted as a field blend interspersed with Durif (Petite Sirah), Carignan, Grenache, Mourvèdre, Mission and Muscat. While most vineyards are now fully segregated, California winemakers continue to use other grapes (particularly Petite Sirah) in their Zinfandel wines. Zinfandel is grown on approximately 11% of California's vineyard land area. Around 400,000 short tons (350,000 tonnes) are crushed each year, depending on the harvest, placing Zinfandel third behind Chardonnay and Cabernet Sauvignon and just ahead of Merlot.
[California regions

In California, 20% of the Zinfandel-growing counties hold 80% of the Zinfandel growing area; however, major producing areas such as San Joaquin County, Stanislaus County, and Madera County produce Zinfandel primarily for blends or jug wine.

Certain California regions are regarded as "exceptional" for Zinfandel, each with identifiable flavor characteristics.

* Amador has a reputation for big, full-bodied Zinfandel. These extra-ripe wines have been called jammy, briary, and brambly, having aromas of sweet berries.
* Although the Santa Cruz Mountains AVA in Santa Clara Valley produces Zinfandel from just 9 acres (3.64 hectares), the Zinfandel from that region is known for its complexity and depth.
* Sonoma county has a Zinfandel-producing land area second only to that of San Joaquin County. The county contains the warm Dry Creek Valley AVA, known for its juicy Zinfandel with bright fruit, balanced acidity and notes of blackberry, anise and pepper. Dry Creek Valley produces Zinfandel in a variety of styles ranging from the high-alcohol Amador style to balanced, spicy wines.
* San Luis Obispo, particularly the Paso Robles AVA with its hot days and cool maritime evenings, produces Zinfandel known for being soft and round.
* While the Napa Valley AVA is known primarily for its Cabernet Sauvignon, Merlot, and Syrah, Napa also produces Zinfandel wines described as plummy and intense, tasting of red berry fruits with cedar and vanilla. Zinfandel in Napa tends to be made in a claret style like red Bordeaux.
* The Russian River Valley generally produces well during warm vintages. Otherwise, the grapes do not fully ripen, leaving the wines with excessive acidity. The area has mostly "old vine" Zinfandel, characterized as spicy and somewhat lower in alcohol than Zinfandel from other regions.
* Mendocino County Zinfandel wines have been considered high quality, but they are less known because they are not heavily marketed.
* Lodi has some of the oldest Zinfandel vines in California. While often used for White Zinfandel production, in the red style, Lodi Zinfandels have a reputation for being juicy and approachable.

[Italy

Most Primitivo is grown in Puglia (Apulia), the "heel" of Italy, and it is estimated to be the country's 12th most widely planted grape variety. The main three DOC areas are Primitivo di Manduria, Gioia del Colle Primitivo (Riserva) and Falerno del Massico Primitivo (Riserva o Vecchio). The Manduria DOC covers still red wine as well as sweet (Dolce Naturale) and fortified (Liquoroso Dolce Naturale, Liquoroso Secco) wine. Falerno requires a minimum of 85% Primitivo; the others are 100% Primitivo. Gioia del Colle Rosso and Rosato contain 50-60% Primitivo, and Cilento Rosso/Rosato contains around 15%.

Historically, the grape was fermented and shipped north to Tuscany and Piedmont where it was used as a blending grape to enhance the body of thin red wines produced in those areas. When the link between Primitivo and Zinfandel began to emerge, plantings in the region and production of non-blended varietal increased. Today most Italian Primitivo is made as a rustic, highly alcoholic red wine with up to 16% alcohol by volume (ABV). Some Italian winemakers age the wines in new American oak to imitate American-style Zinfandel.
[Other locations

The Croatian form Crljenak Kaštelanski was not bottled in Croatia as a varietal in its own right before the link to Zinfandel was revealed. UCD has since sent clones of both Zinfandel and Primitivo to Professor Maletić in Croatia, which he planted on the island of Hvar. He made his first ZPC wines in Croatia in 2005. There is high demand for red grapes in the country, and the government has been supportive of ongoing research. Figures from the department of viticulture and enology at the University of Zagreb claim that from only 22 vines of Crljenak Kaštelanski in Croatia in 2001, there were about 2,000 vines in 2008.

Old vine Zinfandel plantings dating from the 1930s have been found in Baja California, Mexico. There are also small Zinfandel plantings in South Africa, Western Australia and the McLaren Vale area of South Australia.
[Viticulture and winemaking
Zinfandel wine fermenting in barrels.

Zinfandel vines are quite vigorous and grow best in climates that are warm but not too hot, because grapes may shrivel in hot weather. Zinfandel's thin-skinned grapes grow in large, tight bunches that are sometimes prone to bunch rot. The fruit ripen fairly early and produce juice with high sugar levels. If weather conditions permit, the grapes may be late-harvested to make dessert wine. Zinfandel is often praised for its ability to reflect both its terroir and its winemaker's style and skill.

The grapes are known for their uneven pattern of ripening: a single bunch may contain both raisin-like, over-ripe grapes and green, unripened grapes. Some winemakers choose to vinify the bunches with these varying levels of ripeness, while others hand-harvest the bunches, even by single berries, through multiple passes through the vineyards over several weeks. This extensively laborious practice is one component in the high cost of some Zinfandels.

Red Zinfandel wines have been criticized for being too "hot" (too alcoholic), although modern winemaking techniques have helped make them more approachable. On the other hand, Zinfandel producers such as Joel Peterson of Ravenswood believe that alcohol-removing technologies, such as reverse osmosis and spinning cones, remove a sense of terroir from the wine. If a wine has the tannins and other components to balance 15% alcohol, Peterson argues, it should be accepted on its own terms.

When grapes are harvested, the length of fermentation, the length of the maceration period with skin contact and the level of oak aging affect the wine's taste. The degrees Brix at which the grapes are harvested dramatically affect the wine's flavor as well. White Zinfandel is normally harvested early at 20°Bx when the grapes have yet to develop much varietal character, though some examples can develop hints of tobacco and apple skin. At 23°Bx (the degree that most red wine is considered "ripe"), strawberry flavors develop. Cherry flavors appear at 24°Bx followed by blackberry notes at 25°Bx.