Sabrina - If you have lots of earthworms, in the soil around your daylilies, those worms provide the BEST fertilizer ever! Worm castings (poop) are excellent fertilizer! If your daylilies look otherwise healthy, then I wouldn't think you need to add anything else. But I am not an expert here.
As far as making homemade insecticides, here are a few different websites with recipe ideas. If you use a liquid dish soap in any of your recipes, make sure it does NOT have antibacterial agents in it (which will kill the good bacteria in the soil):
http://www.globalhealingcenter...
http://www.wikihow.com/Make-a-...
http://www.apartmenttherapy.co...
The one I have heard about the most is this one (from
http://homeguides.sfgate.com/a... ):
Homemade Bug Spray
You can make your own insect spray from harmless kitchen ingredients. Mix 1 tablespoon of dishwashing detergent with 1 cup of fresh cooking oil to make an effective, all-natural bug-killing concentrate that can be mixed as needed. A solution of 4 teaspoons of concentrate diluted with 1 pint of water in a spray bottle is effective against many soft-bodied insects, such as aphids, whiteflies and spider mites. Spray the mixture generously on the tops and bottoms of leaves, as well as the stems, for effective control.
I, personally, rarely do anything because eventually there will be a natural balance of good and bad in my garden. I do get ladybugs and praying mantis bugs that feed on many other insects.
Good luck!
