Dahlia Flower Planting Zone. Department of Agriculture plant hardiness zones 7 through 10 dahlias need some mild temperatures proper planting. Growing Dahlias for your enjoyment is actually quire easy and very rewarding.
In areas with hot summers. Add compost and all-purpose granular fertilizer to the planting area and mix well. And in some areas in the East Bay one can even stretch the.
Loosen the soil in the bottom of the hole and refill to a depth of 6 inches.
We recommend these varieties noted as heat-tolerant in their descriptions and heat-ok in our dahlia chart through zone 8b in most of the country and 10b on the West Coast. California by the way has six local dahlia societies in zones 9-11a How. Dig a hole 8 to 10 inches deep and wide enough to accommodate the tubers. The big bold blossoms come in a wide range of colors and flower forms.