The Q&A Archives: Digging Dahlias

Question: Is it really necessary to dig dahlias in the fall or can I just leave them in the ground?

Answer: Dahlias grow easily in zones 4-10. In zones 9-10 you can leave the tubers in the ground over the winter (zone 8 with mulch). In all other zones it is best to dig the tubers up before or just after the first mild frost. Gently shake the soil from the tubers, air dry in a cool (35-40 degrees) dry location for a few days, and then store tubers in dry peat moss in the same type of dry, cool environment. Cool garages and attics generally work well for storage but watch out for mice, squirrels, and chipmunks....they love to snack on tubers, bulbs, rhizomes, etc.

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