Dahlias - do they all have tubers?
I bought three dahlias of the "Happy Days" series from B&Q in June as space fillers and they have been fantastic, growing to over 2' with masses of blooms. They still have lots of buds, but I need to dig them up to plant bulbs. The first plant has been removed and transferred to a pot, but it didn't have tubers, only roots. Is this a new annual form?