I have planted both, but any future plantings will be chinese only. The chinese chestnuts produce earlier, grow faster, are much cheaper, and will produce bigger yields from what I read. Best source I have found for chinese is buy them from the wildlife group, $3 for a 3 foot tree they ship with roots wrapped in wet paper. You won't believe how fast they grow. I have some that are over 15 feet tall and only in the ground for 3-4 years. Some I caged just the trunk, others I just stuck in the ground. Both like full or as much sunlight as possible for best results. My earliest trees (all dunstans) are pushing five years old, still no nuts on either type yet, maybe this is the year. Some are about 3 inches in diameter, so it's about time. Thinking I may have spaced them to far apart. We'll see...