Followed instructions for planting. Rarely have an...

Followed instructions for planting. Rarely have any difficulty with my garden but each order Ive had has been 90% duds. Ive ordered young plants, tubers, bare root, and the same issues. They just dont grow. The most recent, our dalhlias - we ordered three and only one came up. I ordered 6 coeropsis bare root and planted them in different areas and none came up. I like the selection of plants but I dont think Ill be ordering from them again.