We were given a couple of containers for the garden, with dahlias, gladioli, and various annuals. The gladioli have long since fallen over and I cut them back for the winter. Most of the dahlias, however, keep putting out new leaves -- some of them are even putting out new buds. Our last bloom was just a couple of weeks ago. Should I just let the dahlias keep going until they finally give up on their own, or should I cut them back now so the bulbs can save their energy for spring? And can I leave the dahlia and gladioli bulbs in the pot for the winter, or should I dig them up and store them indoors? Thanks for any advice!