I'd wait, since the trunk is strong enough not to need staked. Probably wont branch until next year, but they seem very apt to branch on their own. Mine was snapped off about 6 inches above the graft last year in a wind storm. I selected a new leader, and trained it up about 4 feet. It grew no branches last year. This spring, it branched readily, I didn't even need to top it. It new has 8 or 10 branches, and has naturally stopped growing up.