Question: can dahlias grow in texas?
Answer: Zone: Dahlias are only winter hardy in zones 8-11. Planted in the spring, they will grow quickly and the plants will be blooming by mid to late summer. (The USDA Hardiness Zone map puts the Houston metro area in Zone 9A .) ... When to Plant: Dahlias tubers are planted in the spring after all danger of frost is gone.