Soil tests are recommended by almost everyone, and done by almost no one.
I have been recommended 16-4-8 with minors more than any other fertilizer by several hybridizers. Still, the general goal these days for use in the garden for daylilies seems to be a high nitrogen low phosphorous low potassium fertilizer with minors added, and the ph is normally recommended in the 6.6 range. Things like 24-0-5, just an example, I look for what is on sale and reduced the most in lawn fertilizer type products (of course no weed-n-feed products). If you have a few plants costs will not be a problem, but with prices these days if you have a few hundred or a thousand or more daylilies price really matters.
Water will be the key to growing great daylilies and adding organic matter to your soil will also be of great benefit. Those are the two best things I can advise a person to add to their daylily gardens. Fertilizers will help in most cases.
