How to Water Grape Plants

Spray vines with a hose in early spring to prevent frost damage. If temperatures dip below 32 degrees after buds have begun to swell, spray the vines until any ice on them melts. While the hose water will be cold, it is warmer than the ice and will protect the plant.

Water grape vines infrequently during the growing season. Water grapes for 20 to 30 minutes weekly the first year after you plant them. Thereafter, water them deeply every two weeks. If you live in an area that receives rain every week you won't need to water grapes at all. Too much water will cause iron chlorosis. Leaves turn yellow and drop.

Stop watering grape vines in late summer or early fall unless the temperatures remain very warm. This allows the vines to harden off before winter and prevents winter damage. If your area has had warm temperatures and little rain, give the vines one final deep watering before the first frost.