I have many azaleas in my yard and all have bloomed in past seasons. I have 5 groups of George Tabers around trees. This year 2 of the groups did not bloom. The other 3 groups were full of blooms. What could have caused the other 2 groups to not bloom?
Certified GKH Gardening Expert
Several things could cause this, including a lack in phosphorus. This would cause the plant to stop blooming. Add some phosphorus to the soil. This article will help: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm It could also be due to a microclimate in your yard. This can be caused by hills, buildings, dips in the ground and even other plantings. Microclimates can cause an area in a yard to be up to a full zone higher or lower than other areas of the yard and may be as small as just a few feet.