Guess I'm a bad Mommy. My daylilies don't get much fertilizer at all. I do top dress with my home made compost when I have it and last year used some chicken compost from the university here in town one time. I have used Spray and Grow and Bill's fertilizer years ago and just ordered some more to try this year and see if I notice a difference. I use Osmocote on my clematis, peony and to renew my potting soil in containers when I reuse it, but haven't tried it on daylilies.