How to Water frost grape?
Water deeply and regularly during dry periods; reduce watering after fruit set.

frost grape · Vitis riparia
Also known as: riverbank grape
Grow in full sun, in well-drained, humus-rich, preferably neutral to slightly alkaline soil. Keep watered in dry spells. The fruits of this species are popular with wildlife, though generally too sour for human consumption
Water deeply and regularly during dry periods; reduce watering after fruit set.