Hands-down, the best way to find dahlia tuber sales from reputable growers is DAHLIAaddict.com. 

Home gardeners usually divide dahlia clumps into individually viable tubers for replanting either in the fall, immediately after digging (also called lifting), or in the spring, after storing the clumps whole.

These are the most common environmental issues we've seen our growers experience when they plant otherwise totally healthy, viable tubers. Use this guide to help troubleshoot what the issue may be.