Leslie, when I plant daylilies, I put a handful in the hole, and top dress right then as well. I always top dress in the fall, and then again in the spring. My plants are healthy, and I've been told that you can't use too much. Twice a year makes it easy, and I really can't imagine doing it more often than that. But, you could if you wanted. I just haven't seen a need for doing it more often.
