Dahlia Flower Annual. Overwintering dahlias is easier than you might think. Dahlias are easy to grow put on an amazing show all summer long and were proud to offer one of the largest selections anywhere.
Zone 8 and 9 Watch for foliage to die back after the first killing frost in autumn. Gardeners in zones 2 to 7 can simply plant dahlia tubers in the spring and either treat them as annuals or dig them up and store. Read on for some easy step-by-step instructions.
Dahlias vary from under 12 to 7 giants.
A garden showstopper dahlias come in an assortment of bold silhouettes. Their flowers may be demure buttons pompoms or huge blowsy blooms. Red pink orange yellow white purple. They are only winter hardy in planting zones 8 to 11.