HI, I have a number of Dahlias and Anemons. Do I need to lift them in the fall or can I keep them through the winter? What is the best if I want to continue having big beautiful flowers. If I keep them in the soil is it best to cover them or mulch? Also, what about spring bulbs? I bought some rare varieties of tulips and narcisses and want to keep them for many years. Any suggestions? Is there a difference if I keep them in pots? Thanks P.S. I live in Maple Ridge. The soil is mostly clay.