I have daylilies in a bed by my deck interplanted with roses. All the daylilies are a lighter green compared to the rest in other beds around the yard and in pots that are a dark, rich green. The roses are doing fine, they get plenty of light. I fertilized with Nutricote a few weeks ago. I just bought a bag of Milorganite - would this help? What can I fertilize with that can bring these lilies back to a healthy green? Thanks!

Judith