Dahlias?

To store them, bury them under a privet hedge for the winter as it's always dry there.

I bought one yellow stickered crown of Vancouver (flowers are red with white tips) and now have six plants taken as cuttings from this single crown. The crown (which still has loads of shoots) will be planted in the garden to brighten my autumn days and the cuttings will be planted at the allotment for cut flowers!