Daylilies do love nitrogen, but remember that it does make for taller scapes and more robust growth. Composts Composts are simply the finest soil builders that can be used - and usually the cost is low. Daylilies are heavy feeders, so use enough compost to supply plenty of nutrients. Provide the best method of building soil. All manures are excellent.
Horse manure is perhaps best because it breaks down well in winter.
Cow manure breaks down more slowly. Chicken manure can give daylilies a quick boost and aids greatly in making fibrous roots. Yes, manures have weeds, but one must make sacrifices. Leaves Rotted leaves make a wonderful compost. Everyone should have a compost pile.