If you ask a flower grower the secret to incredible dahlia displays year-after-year, many will tell you it's lifting each and every tuber to store away carefully and replant in spring. But, this only works if proper storage is in place, otherwise you may find you're left with mushy dahlia tubers.
The truth is overwintering dahlias requires careful preparation and specific storage requirements, much like storing bulbs. They turn mushy when the storage set-up has allowed excess moisture in. At the same time, you don't want to let your tubers dry out, as this can dehydrate and shrivel them.
