What Zone Does Dahlias Grow In. Feb 07 2015 Dahlias are native to and grow wild in many parts of Mexico they are also the national flower of Mexico so i would think they would do very well in zone 9. Dahlia plants are considered to be a vulnerable perennial in colder North American regions.
Dahlia plants are considered to be a vulnerable perennial in colder North American regions. ZONE Though dahlias are only winter hardy in zones 8-11 gardeners in zones 2-7 can simply plant dahlia tubers in the spring. You have to dig up and store them over winter in the Upper and Middle South USDA Zones 6 and 7 but they can stay in the ground year-round south of there.
Note that these plants can be injured at temperatures below 25 degrees F 2 degrees C.
For the uninitiated dahlias are tender perennials that grow from tuberous roots. Add compost and all-purpose granular fertilizer to the planting area and mix well. DAHLIA feeder roots run only about 1 under the soil and can extend out from the plant. ZONE Though dahlias are only winter hardy in zones 8-11 gardeners in zones 2-7 can simply plant dahlia tubers in the spring.