I have two quick questions about chalk maples. I've looked at them online, and they seem to be a sugar maple in miniature with smooth grey bark and a more southern growing range. But the descriptions say they're understory trees and very shade tolerant. I'd like to plant one in full sun on deep, sandy river-bottom soil, zone 7. Do you think it would do well there? Also, what kind of growth rate does a healthy chalk maple have?