I used to feed my Astilbes regularly because I had read that they do like their fertilizer. Stopped doing that several years ago as I really didn't see much difference. I'm still torn about whether to fertilize hydrangeas to get them to bloom but I think it's the newer varieties that need that extra push to bloom. I'm coming to the conclusion that plants have to earn a spot in my garden or it's just not meant to be. Currently, 'Endless Bummer' is raising a big question mark for me. Second winter that it's died back to the ground and won't recover this year enough to bloom.
