My iris and azaleas have not bloomed nearly as much as in past years here in metro Atlanta. Is something going on this year or do I need to investigate my own yard for the problem? Thanks.
Certified GKH Gardening Expert
Are you using fertilizer on your azalea plants? If so, they may be getting too much nitrogen and not enough phosphorus. Nitrogen makes healthy green plants, but too much blocks blooming. Use a fertilizer higher in phosphorus or even a phosphorus only amendment, like bone meal, to get them to bloom. This article will help you: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm The most common reason for irises failing to bloom is overcrowding. Dividing and transplanting them usually helps. In addition, it can be attributed to poor pollination. Try to entice pollinators (bees, butterflies, etc.) to the area with brightly colored flowers. Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/bulbs/iris/dividing-transplanting-iris.htm