Viticulture depends on such factors as sunlight, soil, moisture, wind, and pest and disease control. The best wines result from warm, dry conditions. Grape vines can be transplanted from established vineyards, or propagated from cuttings of new growth with two or three buds. Two thirds of the grape vines in the United States grow in California, mostly in the San Francisco Bay area, supplying the bulk of the grapes for the expansion of the American wine industry since 1950. Washington and New York rank next among the 13 grape-growing states.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.