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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comI divided them several years ago and they do not appear to be overcrowded. I planted them shallow so the tubers are showing to prevent rot. I have used a modest quantity of lime in the soil. They seem to have excellent leaf growth and size. They are mature. Any ideas on why they are relatively unproductive bloomers?
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1 Comment To "bearded Iris blooming poorly"
#1 Comment By Nikki On 05/18/2012 @ 7:12 am
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 [1]
In addition, it can be attributed to poor pollination. Try to entice pollinators (bees, butterflies, etc.) to the area with brightly colored flowers.