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How to Get an Iris to Bloom. Irises (Iris spp.) flower in early to midsummer, producing multiple blooms on each stalk. They grow in U.S. Department of Agriculture plant hardiness zones 3 through 9, depending on the variety. Irises usually bloom with no help from you, but problems with the growing site or overcrowding can reduce flowering.

Table of contents How to Get an Iris to Bloom
Plant Them Right 00:40
The Right Fertilizer 01:19
Thin Them Out 02:00
Timely Pruning 02:45

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