Box stores and chains for cheery common annuals and perennials, and the occasional clearance plant or shrub. Get a mail order gift certificate every Christmas and birthday from a friend in NJ. Really like a couple of other online vendors for what the local stores don't carry. And mamajack's co-ops. Since I live so close to her, I can order more interesting stuff, then go pickup and drool over her gardens. Get the best of
both that way.