Thanks. I occasionally feed my perennial beds with an organic fertilizer, although I haven't for the past 2 seasons (due to laziness). I do mulch in the spring and fall with a compost mix. I find that most plants exeed their stated size for me - I think it is my temperate climate. Lucifer gets all of 48" and then some for me. I have to be diligent about cutting back the 'leaners' or he will pretty much over-bully his companion plants. I do love the fountain shape, and the hummers go nuts over the blooms.