Is it ok to plant one of these now to get a jump start next spring? Which one would bloom for the longest (seasonally)? Is it possible to keep these around 3 - 3 1/2 feet high? I am in SE Michigan.
Penny Mac is a rebloomer for what it is worth. Mine is 2 years old and about 3 1/2 feet now. With pruning I would think you can easily keep this in bounds.