there is a difference between peony (SHAOYAO) and tree peony (MUDAN), let's assume you meant SHAOYAO which is pretty common in Canada. 4 H/ z8 X+ x5 }3 b1 L1 H' Rfirst year no chance; 2nd year 50/50 (99% chance to bloom if you were in central china ); 3rd year 95% given that you treated it the right way.