This time of year I top dress with a nine month slow release (16-4-8) about a tablespoon around each plant (2-3 fans) I do not have clumps. I also add Chicken Litter, about 2 tablespoons around each plant. You may also need to add some lime to adjust the ph to about 6.5, if the ph is too low the plants can't take up the fertilizer. You can get a cheap ph meter at any box or hardware store. I also water my daylilies every other day ( I think water is more important than fertilizer).
