Daylily won't bloom?

by Andrea
(Breckenridge CO)

I have a beautiful, very extensive cottage garden at 9500 feet in Colorado with many very large, foliage only Day lilies, that have lush foliage but no blossoms. It sounds like I may need to ammend the soil with more organic material and that I also need to divide my plants, which I have not done since planting many years ago. Do you have any further insights? Thank you for your help. Andrea

Hmmm, absolutely no blooms on any of them sounds more like Southern varieties or tender evergreen varieties than a lack of feeding. If they were blooming okay a few years ago, and only one or two not now then I'd go with dividing to rejuvenate them.

But all the daylilies not blooming after they were blooming sounds more like cultural problems. A mass infestation of thrips, a chemical spray problem from chemical drift or runoff. Daylilies are tough old birds and should bloom for many years with almost no intervention.

The fact that they aren't (all of them) isn't likely a feeding thing but rather something else. You can try dividing them but that won't solve the cultural problem that's stopping them from blooming.