Why do my Calla Lily plants not bloom?
I have a patio container of calla lilies that have multiple, full vegetation, but do not produce blooms. What do I need to do to have them produce blooms?
Certified GKH Gardening Expert
It sounds like they are fertilized with just a little too much nitrogen, and not enough phosphorus and potassium.
You can, usually, supplement with a high phosphorus and potassium feed during the time when it needs to bloom. This will help negate the nitrogen content.
There are a few other causes, but they are a little less common. Still it is worth mentioning. This article will help: https://www.gardeningknowhow.com/ornamental/bulbs/calla-lily/make-calla-lily-bloom.htm