Grape is a woody, deciduous climbing vine grown for fruit and ornamental cover. A single established vine can produce fruit for decades and yields heavily once mature. In Zone 6b, choose cold-hardy cultivars; Vitis vinifera types are marginal here, so many growers select hybrids or American crosses for reliable winter survival.
Grapes fruit on shoots growing from one-year-old wood, so annual dormant pruning is essential. Train the vine to a two-wire trellis or arbor and remove most of the prior year's growth each winter, keeping a set number of buds. Fruit needs full sun and good air movement to ripen and to limit fungal disease.
Powdery mildew
White or grey powdery coating on leaves — usually starting on older growth in humid conditions or when nights cool.
Improve air circulation by thinning plants. Apply neem oil or potassium bicarbonate spray at first sign. Avoid overhead watering.