It is a beautiful tree that gets green leaves and is a great shade tree, but it's amazing rippled grey trunks are absolutely stunning and architectural. These beautiful plants are hardy to USDA zone 4 or possibly colder with protection. They would make excellent additions to your rare plant collection, or just make a unique statement in your yard.
Start them in 70+ degree temperatures and a brightly lit area. They should be kept in these conditions throughout germination, they do not need any additional light, other than what Mother Nature gives us during the daylight hours. Keep in mind that unlike vegetable seed, dahlia seed will not all sprout the same day; germination will occur over several days. The usual success rate in dahlia seeds is 50-75% success