Dahlia Flower Zone 9. In USDA zone 9 dahlias can be treated as perennial hardy bulbs and left in the ground. May 26 2021 Dahlia flower zone will be hardy to zone 9.
Dec 28 2013 Dahlias do best in zones 8 9 and 10 where they do not need to be dug up every winter. It is rewarding because very few flowering garden plants produce such prolific and wonderfully exuberant flowers for such a long season in the Bay Area from May to November nearly 7 months. But if you find dahlias that havent been altered genetically too much they should do well in your climate.
7 rows Sep 29 2020 About Dahlias.
But if you find dahlias that havent been altered genetically too much they should do well in your climate. Growing Dahlias for your enjoyment is actually quite easy and very rewarding. Dahlias on the other hand are. However you really should wait until April if you dont want to take any chances.