Vitis 'Marquis'

Common Name: grape 
Type: Fruit
Family: Vitaceae
Zone: 5 to 8
Height: 15.00 to 20.00 feet
Spread: 15.00 to 20.00 feet
Bloom Time: May to June
Bloom Description: Green
Sun: Full sun
Water: Medium
Maintenance: High
Flower: Fragrant, Insignificant
Attracts: Birds
Fruit: Showy, Edible
Tolerate: Rabbit, Deer

Culture

Best grown in deep, loamy, medium moisture, well-drained soils in full sun. Tolerates a wide range of soil conditions, including average garden soils, but must have good drainage. Best sited in a location sheltered from winter winds (preferably a southern facing slope) and well removed from frost pockets. Self-pollinating. Grapes need a support system, training, regular spraying and regular pruning to maximize fruit production.

Noteworthy Characteristics

Vitis is a genus of about 65 species of woody vines. Hybrid grapes are grown for a variety of purposes, primarily for making wine, but also as fresh fruit from the vine or dried as currants, raisins or sultanas. Vines are infrequently grown for ornamental purposes only.

The genus name Vitis is the Latin name for the old-world vineyard grape (Vitis vinifera).

‘Marquis’ is a mid-season, white seedless table grape that was developed at Cornell University. It is a hand-pollinated cross between ‘Athens’ and ‘Emerald Seedless’. It is distinguished by its large fruits, excellent flavor and good winter hardiness. It is primarily grown for use as a table grape, but is also known to produce a delicate white wine. ‘Marquis’ is a woody, deciduous, upright to slightly trailing vine. Panicles of fragrant, greenish, self-fertile flowers are followed by large clusters of spherical, medium-sized, yellow-green grapes that ripen in the mid-season. Fruit sometimes takes on amber tones as ripening continues. Ripe fruit is characterized as having a very mild labrusca character, later ripening into a richer fruity American flavor. Ripe fruit is attractive to birds, mammals and some hornets and wasps. Upper leaf surfaces are green and lower leaf surfaces are felty, greenish-white. Flowers are attractive to bees. US patent PP11012 applies to this cultivar.

Problems

Grapes are high maintenance plants that require regular pruning, structural support, and pesticide treatments to produce significant yields. Grapes are susceptible to a large number of diseases, particularly in humid summer climates, including anthracnose, black rot, downy and powdery mildew, crown gall and botrytis bunch rot. Insect pests include phylloxera, grape berry moth, Japanese beetle, leaf hopper, leaf roller, mealy bugs and flea beetles. Birds are perhaps the most damaging vertebrate pest to grape yields, but deer can also eat young shoots, leaves, and fruit clusters.

‘Marquis’ is reportedly moderately resistant to botrytis bunch rot.

Uses

Grapes are primarily grown for fruit production in home fruit gardens where ornamental interest is not a main concern. However, grapes do in fact have good ornamental value: bold summer foliage, showy fruit, some fall color and shaggy, twisted trunks and branching often best seen in winter. When grown on fences, walls, trellises, arbors or other structures, grapes can be quite attractive year-round and can provide good cover, screening, or shade to areas around the home. Woody vines can be woven into decorative wreaths.