Grape Varieties Flashcards
Merlot
Early budding - vulnerable to spring frosts.
Mid ripening - can be picked before autumn rain.
Susceptible to coulure, drought, BBR - sorting is necessary. All can reduce yields.
Reaches higher sugar levels than Cabernets (advantage previously but with a warming climate is less so today).
Contributes medium to pronounced intensity fruit (strawberry, red plum.and herbaceous in cooler years. Cooked blackberry and black plum in hot years), medium tannins and med-high alcohol to Bordeaux blends
Cabernet Sauvignon
Late budding - protection to frost.
Small berried and thick skinned with high tannin content - high tannin wines.
Prone to fungal diseases, especially powdery mildew and the trunk diseases Eutypa and Esca.
Late ripener - vulnerable to autumn rains.
Produces highest quality fruit on warm, well drained soils such as gravel soils in Medoc.
Contributes pronounced violet, blackcurrant, black cherry and menthol/herbaceous flavours, medium alcohol and high acidity + tannins to Bordeaux blends.
Petit Verdot
Early budder and ripens later than Cab Sauv making it unpopular in the past in Bordeaux (frost, autumn rains and failure to ripen)
Semillion
Mid-ripening.
Susceptible to BBR and noble rot in the right conditions.
Can be high yielding.
Low intensity apppe, lemon and grassy when underripe. Has a medium body, medium alcohol and med-med(+) acidity.
Contributes low-med intensity aromas, weight and body, and med acidity to high quality, dry white blends. (Softens Sauv Bs intense flavours and high acidity).
Has affinity with sweet spice from new oak.
In botrytis affected wines it contributes pronounced honey and dried fruit, and a waxy texture.
More susceptible to noble rot than Sauv B - often a high proportion in blend eg Climens and d’Yquem.
Prized for ageability, develops toast and honey.
Muscadelle
Very prone to BBR.
Largely used in sweet white wines where it contributes flowery and grapey notes.
Gamay Noir
Early budding, so susceptible to spring frosts.
Vulnerable to millerandage in cold, damp, windy conditions, which can reduce yields.
It has thin delicate skins so is vulnerable to rot and wind.
Early ripening, so can usually be picked before autumn rains arrive.
Wines made from Gamay can express different nuances depending on topography and soil, giving wines of varying tannins and fruitiness, mainly relating to ripeness of skins and seeds. Good drainage, sunlight interception and warm granite soils = intense fruit character compared to being leafy and green in less ripe examples.
Productive grape so yields need to be controlled to produce concentrated, ripe grapes, usually done by reducing the number of buds to restrain high fertility.
Riesling
Cold-hardy variety (suitable for cold winters)
Buds late, providing protection against spring frosts.
Requires a good site: full exposure the sun with good drainage, and a long growing season to ripen fully, but if provided is capable of high quality at high yields.
Retains acidity as it ripens.
Can provide natural high levels of sugar and is susceptible to botrytis, making it ideal for producing sweet wines.
Depending on ripeness, riesling displays fruit from green apple to tropical, with floral aromas such as honeysuckle. It is capable of making wines with pronounced intensity and great conplexity.
With age, it develops toast, honeyed and petrol-like aromas.
Gewurztraminer
Early budding, so prone to spring frosts, and early ripening, avoiding autumn rains.
Rapidly accumulates sugars, but is often picked late to achieve fully ripe skins to maximise aromas and avoid unripe tannins.
A vigorous variety, requiring careful pruning and canopy management, but only moderately productive, due to coulure.
Can suffer from chlorosis and dessication of the stems.
Pinot Blanc
Early budding, so vulnerable to spring frosts.
Prone to fungal diseases.
Early ripening
Auxerrois
Early ripening, low aromatic variety producing wines with low acidity.
Pinot Gris
Early budding and early ripening.
Produces moderate yields and is susceptible to BBR and downy mildew
Muscat Blanc à Petits Grains
Tolerant of dry weather so suitable to Mediterranean climates.
Susceptible to powdery mildew BBR and mites.
Melon
Quite hardy, making it well suited to cool regions, but buds early making it prone to spring frosts.
Ripens early, reducing the threat of risk at harvest and can produce high yields.
Has good resistance to powdery mildew.
It has tight bunches of fruit and is susceptible to downy mildew and BBR.
Makes wine with high acidity, a light body and low to medium - alcohol.
Low intensity green apple aromas and often made sur lie.
Acceptable to good, with some very good, inexpensive to mid.
Chenin Blanc
Buds early.
A vigorous variety and if its allowed can carry high yields.
Prone to powdery mildew, BBR (and positive effect of botrytis) and trunk diseases.
Ripens late, and ripens unevenly, so for the best quality it has to be picked on several passes through the vineyard, which in turn limits the amount of mechanisation.
Because of this, where growers are seeking a high proportion of botrytis affected grapes, multiple passes through the vineyard by hand is necessary, adding to cost.
Cabernet Franc
Early budding, making it prone to spring frosts.
Prone to coulure and therefore reduction in yields.
Mid ripening, so can often be picked before autumn rain begins. Although if underripe the flavours can be excessively leafy.
It’s winter hardy, making it suitable for cool areas.
Grolleau Noir
Early budding and mid ripening.
Prone to BBR.
Sauvignon Blanc
Late budding and relatively early ripening, making it suitable to be grown in cool climates and regions without the threat of early autumn rains.
Grows vigorously and therefore best on poor soils.
Canopy has to be carefully managed to avoid shading (leading to underripe, overly green fruit flavours).
Prone to powdery mildew, bbr, and trunk diseases (eg Esca) including, if cordon trained, to the fungal disease eutypa dieback.
Wines typically have pronounced intensity grass, Bell pepper and asparagus with gooseberry, grapefruit, and wet stone flavours (cooler areas) to riper, passion fruit (warmer). Typically medium body and alcohol, with high acidity.
The style is also influenced by picking dates (growers have to judge optimum ripeness, but before acidity drops and flavours become overripe.
Syrah
Vigorous variety. Susceptible to mites and botrytis bunch rot.
In addition to common diseases, there’s a disease called Syrah decline or disorder, in which the leaves turn red and the graft point breaks up, leading to the death of the vine.
Grenache Noir
High yielding variety that needs a warm climate to ripen.
Ripens late and therefore vulnerable to early autumn rains.
Upright growth makes it very suitable to be trained as a bush vine, pruned short to contain vigour, and it does well on dry, low fertility soils.
Has good drought resistance but is prone to coulure and the fungal diseases downy mildew, phomopsis and bbr. Also prone to bacterial necrosis or bacterial blight, a disease that kills leaves and shoots and eventually the plant (the only way of combating the disease is by planting disease-free stock and avoiding contamination from pruning tools.
The grapes can accumulate high sugar levels quickly, which can be an issue for dry wines but makes it very suitable for VDNs.
AKA Cannonau in Sardinia.
Mourvèdre
Late budding and late ripening, only thrives in warm to hot climates. It needs high temperatures at the end of the season to ripen fully, and therefore can be underripe if the summer isn’t hot.
Not drought resistant but requires small but regular amounts of water, eg from deep calcerous soils that store water.
Best pruned short and can be grown either with a cordon system or on bush vines.
Only produces low yields.
Prone to mites, leafhoppers and sour rot (a disease that affects ripening bunches due to insect or bird damage to grapes, which in turn become prone to bacteria and fungi).
In the winery it is strongly prone to reduction, therefore care has to be taken to make sure the must has adequate access to oxygen.
Typically aged in old oak.
Cinsaut/Cinsault
Late budding and high yielding variety with good drought and heat resistance.
To produce high quality, yields must be restricted.
If grown on soils with excessive lime it can suffer from chlorosis.
It is prone to esca and eutypa, and to mites and grape moths.
Viognier
Early budding, prone to frost.
Tends to be grown on trellis system or on poles to prevent wind damage.
Yields tend to be low and unpredictable due to poor flowering and fruit set (coulure) reducing returns.
Picking must be judged accurately as the fruit needs to be fully ripe to have typical pronounced aromas. However, if left too long, they lose flavour and acidity while rapidly gaining sugar, resulting in unbalanced wines that lack flavour.
Marsanne
A late budding white variety that is vigorous and productive.
To produce high quality wine, yields must be kept low to reduce the amount of fruit being ripened. Therefore performs best on stony and low fertility soils such as the steep slopes of the northern valley.
Prone to powdery mildew, mites and bbr.
Medium lemon colour, sometimes gold. Low intensity honeysuckle, lemon and apricot, an oily texture, medium acidity, full bodied and medium to high alcohol.
Roussanne
A late budding variety that grows best on low fertility, well drained soils.
It has poor resistance to wind, and therefore sites must be chosen carefully.
Variable on the amount of fruit it produces (coulure) and is very susceptible to powdery mildew, bbr and mites, lowering yields and requiring additional work. More difficult to grow successfully than Marsanne and therefore less commonly grown.
Wines are medium lemon, sometimes gold. Medium to + aromas of pear with herbal notes, medium to + acidity and medium to high alcohol.
Roussanne is similar in colour and structure to Marsanne but wines tend to age faster.