Itoh peonies, as well as any other peonies take about 5 years sometimes before they bloom. They will do though when they've grown a bit longer. Hopefully you haven't planted them too deeply. The shoots that new growth comes from needs to be covered but only just under the soil. As long as you have good growth otherwise, the main ingredient now is patience. They will be worth waiting for. This is a good variety, and stays compact. Not only that it will last for years. Good choice. These plants appreciate feeding well once the new growth starts.