Dahlias won't bloom
My father in law, who lives in Seattle, grows beautiful dahlias and gave me some of the bulbs (I live in Michigan). However, they will not bloom for me. This is my third or fourth year trying. I've planted them in good compost in full sun and water them sufficiently. I overwinter them correctly I believe. I have about 20 bulbs and got a total of 3 very small blooms.