I have started my dahlia bed with three plants. I bought them from a local co-operative feed and seed store. According to the packaging they were all different colors. They are now blooming. They are all white. Do dahlias do well in south Mississippi? I knew a lady down the road who had beautiful ones year after year. She has now passed on, and I never learned what her special knack was, if any. Do you know of a source in the south which would specialize in dahlias for the heat and humidity of this area? Thanks, so much!!