Dividing and Storing Dahlia Tubers: Two Schools of Thought

Dahlias can be dug and stored over winter or left in the ground in mild climates. For cautious gardeners: dig in late November, cut stems 2 inches above tubers, dry a few days, then store in a cardboard box with peat moss or perlite inside a loosely closed garbage bag. Replant in spring when nights stay above 60°F, separating tubers with sprouts. Fertilize at planting and again in late June.

The Dahlia Society of Georgia, however, says digging is unnecessary in many southern gardens—plants often survive and thrive undisturbed for years.