With the signature rolled petals of cactus-flowered Dahlias, 'My Love' Cactus Dahlia blooms have white with a hint of lemon-lime at the center. In full bloom, these large, dazzling Dahlias are a showstopper in the garden. Dahlias are perennial in zones 8-10, but in cooler zones, tubers can be dug after frost comes, stored over winter, then re-planted the following spring. Grow Dahlias in a sunny spot, in average soil that drains well. Keep moisture consistent once it begins to grow and enjoy a non-stop color parade. Deadhead spent blooms to encourage more flowers and pinch off small side buds to encourage larger flowers if desired.