I don't fertilize my lawn and only rarely fertilize my flower beds. I do mulch with a compost mix, not sure what the numbers would be on that. I also do have some bloom fertilizer of some sort and may try that to see if it does anything. I don't recall exactly when I got this plant, but it was definitely a tiny little seedling and hopefully THIS will be its year of bloom! I've seen some tree peonies at nurseries that are 1/3 the size of mine, in full bloom. Not fair! I'll hang in yet another season, this plant is not in a prime spot and for the most part I forget about it. It does seem to be a favorite spot for my little green tree frogs, so I guess it has some value...