I just read an article 9-2018 published by B&D Lilies.  They recommended alpha pellets be spread after bulbs are done blooming, so that nutrients can go into the ground while the bulb is renewing its energy.  The same is recommended for peony plants and also recommended for peonies is tomato and/or vegetable food.   Of course there is specific fertilizer for every plant, but I feel I don't need 20 different fertilizers for every plant in my garden. 

Here is some information. 

Dan Trimmer wrote Number one is:  "WATER, WATER, WATER.  If you do nothing else to your flower beds, which hopefully are filled with daylilies, provide at least 1 to 1-1/2 inches of water per week.  This is more important than any feeding program.  


Whenever possible incorporate as much organic material as you can get your hands on into your garden beds.  Compost, composted leaves, animal manures, cottonseed meal, corn meal, bone meal, and like will help keep your soil loose, provide valuable trace minerals and retain moisture.   10-10-10is not recommended!    Daylilies are in the family of plants known as monocots.  They’re in the same plant family as ornamental grasses or corn!  Monocots prefer to feed at a rate of 3-1-2, or when in active growth 4-1-2.  

Early in the growing season, in addition to the basic fertilizer regiment, it’s important to add what I’ll call the major minors:  Iron, Magnesium and Calcium.  Iron can come from an organic source such as Milorganite or an Iron supplement.   Following bloom season with the first cool weather in the early fall, was the second very serious feeding period.  It’s important not to use a time-release fertilizer at this time, as we want our rapid growth to end before the onset of very cold weather.  This second feeding period can result in twice the plant the following year as compared to unfed plants.  

I’ve found liquid feeding modest amounts of plant food very often to work wonders.  It’s also important to vary the product applied.  Liquid feed any number of other products, most with a very high first number (Nitrogen).

A last couple of thoughts.  Firstly, risk using too little fertilizer – not too much.  (Can’t say this in too loud a voice!)  Secondly, organic sources are better than chemical fertilizers, but for large gardens, we have little choice but to use the above-mentioned chemical fertilizers.  "

My fertilization plan here in Vancouver WA.  Once again these are my thoughts gleaned from multiple daylily people.    I’m using three products.  Alfalfa Pellets, Milorganite, and Miracle Grow or its cousins.  Early spring I broadcast Milorganite, followed by alfalfa pellets.  Once these are watered into the soil for a few months I use Miracle Grow with a hose end sprayer. I have no “written in stone” schedule, just a general spraying for the entire garden. Watering overhead may produce water spotting which makes the flower less attractive.  A daylily likes water  and sun.  Once the bloom season is over cut back on the watering, as it isn't necessary.