Grapevine

Grapevines are usually planted in early spring in full sun, sited where they are sheltered from winter wind and frost, and set into deep, well-drained soil since their roots reach two to three feet down. Vines are typically grafted onto rootstock, and the graft union should remain above soil level when planting; a healthy vine needs roughly fifty square feet of arbor space, with vines spaced about eight feet apart, or planted fifteen centimetres from a wall when trained against one, or 1.5 metres apart in rows 1.5–2 metres apart for wine production. Ripening depends on a temperate cycle of a cool winter followed by a warm growing season of 150 to 180 frost-free days, and hot, humid summers reduce fruit production.

Outdoors, established vines need little watering except in dry spells but are heavy feeders: a generous mulch of well-rotted manure in early spring, a scattering of blood, fish and bone, and a tomato feed through early summer (weekly for dessert grapes until the fruit starts to ripen) support growth, and vine vigour depends on soil fertility.

A support and training structure such as a trellis, wire or arbor is needed to keep the vine off the ground and to allow good air circulation. Newly planted vines have their flowers removed for the first two years, with only a few bunches left until the plant is about five years old; first-year growth is restricted to three vertical stems tied to wires in autumn, side shoots are pinched out in spring, and fruit is thinned in midsummer. Regular pruning is required to prevent the vine from overbearing.

Pests: The vine is particularly susceptible to grape phylloxera, an insect that damages roots and disrupts water and nutrient uptake, causing loss of leaf surface, reduced yield and eventual death of the plant over four to seven years. Other insect problems include mealybugs, flea beetles, leafhoppers, leaf rollers, Japanese beetles, grape berry moth and grape erineum mite, alongside wasps, hornets, birds, deer and rodents; geraniums planted nearby can help deter Japanese beetles.

Diseases: Reported diseases include gray mold, crown gall, botrytis bunch rot, black rot, downy mildew and powdery mildew. Poor light and inadequate air circulation can worsen fruit quality, promote rotting and encourage powdery mildew.

Fruit typically reaches harvest in fall. Young leaves intended for culinary use are picked while still green.

Culinary: Grape berries are eaten fresh, cooked into jams, jellies and juice, baked into pies and desserts, or dried into raisins; the fruit can also be concentrated into a sweetener or fermented into wine and vinegar, and its seeds are pressed into an oil comparable to sunflower oil that withstands high cooking temperatures and is used in French cuisine for its clean, neutral flavor. Young leaves are used across Greek, Turkish and Middle Eastern cooking as a wrapper for fillings such as rice, minced meat, herbs, nuts and dried fruit, valued more for texture than for flavor of their own.

Ornamental: Beyond fruit production, the vine is grown as a specimen plant, trained over a pergola to shade a patio, or used as a privacy screen; its peeling bark and climbing form give it interest in a winter garden, and it is grown as an attractive climber for walls and fences.

Traditional: Stuffed grape leaves hold a particular place in Greek and Middle Eastern cooking and were historically favored by Sephardic Jewish families because they could be prepared ahead of the Sabbath. Wine made from the fermented fruit carried spiritual meaning for Greek intellectuals in antiquity and continues to be used in Roman Catholic communion as a symbol of Christ's blood.

Cosmetic: Oil pressed from the seeds is also used as an ingredient in skin and hair care products, valued in massage and aromatherapy applications as a natural moisturizer.

The species is native to Europe and central Asia, spanning the Mediterranean, central Europe and southwestern Asia. Greeks and Romans were already committed grape growers by the third century BC, and wine drinking held a spiritual role for Greek intellectuals of that era, a significance later carried forward into Roman Catholic communion.