Love redbuds and always thought it would be cool to have one as bonsai, but never had any luck getting one to survive in a pot. I figured it would have to start young, grow big and live over-potted with little, to no root work. Then, they’re cool about 3 weeks in the year,and begin to look ratty in the summer. But there’s nothing like them blooming along the roadside and in yards in early spring. Good luck, hope you succeed.