I give ours a shot of Miracle Grow Bloom formula a couple of times once 1st week of Sept. and another 10 days later. Seem to get better increase and root development, but it may do nothing and I feel better. LOL

I wouldn't use any granular or time release fertilizer this time of year. IMHO FWIW

I don't feed my daylilies anything except composted cow manure. That way, the nutrients are incorporated into the soil slowly, and you don't have to worry about producing a sudden "flush" of growth that might be damaged later on by frost. The compost will continue to "work" until the worms "go to sleep" for the winter, and it will begin to work again as soon as the soil warms up in the spring. I often lay down compost in the fall (even in my zone) because I know its action will be stopped as soon as the ground freezes (and probably before that, as the worms head deep underground). I will then give them a second dose--side-dressing--- mid-season, so around late June, early July. To be honest, I try for spring and early fall, but it usually ends up being later in the fall, and later in the spring. I don't suppose it matters as long as there is compost there for the worms to carry down to the roots of my plants. MacThayer