The Q&A Archives: Irises Blooming at Different Times

Question: My Irises are blooming at different times. I can understand the one just planted last fall. But many have been in the same spot for at least three yrs. Can you tell me why? I live in Hatton, W

Answer: A. With the assumption that you have several different varieties, it's safe to say that you have varieties with different bloom times. Just as with classes of other common perennials (peonies, mums, phlox, etc.), varieties do bloom at slightly different times, usually only about 1 to 3 weeks earlier to start and later to finish. Sun exposure, soil type, fertilizing, and watering regimes will also affect bloom times.

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