I have two bird of paradise about 5 feet away from each other in planters. They have a southern exposure and one blooms all summer long, but the other gets buds that don't open. They just seem to get stuck halfway. I have had two blooms open this year for the first time. What is going on?
Bird of Paradise Blooms, but They Don’t Open
Certified GKH Gardening Expert
This is normally caused by a humidity issue. I would increase the water to the plant just a bit to increase humidity. You may also want to try wetting the leaves a bit in the morning (but not in the evening as this can encourage fungus) to raise the humidity.