My iris are not blooming. Can anyone help?
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Julee J on Mar 30, 2012Did the fertilizer have too much nitrogen maybe?Helpful Reply
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Flowerscapes Garden Design & Landscaping on Mar 30, 2012The weather has been crazy with droughts, heavy rains, freezing last winter. Could be that. They may need to be divided. Iris needs the rhizomes to be exposed at least 25% above the soil. They gather energy from the sun to bloom. Perhaps they are covered up. Also, if too much nitrigen in the fertilizer, some plants produce more leaves and have less energy for blooms, such as day lilies. A 10-10-10 fertilizer with micro nutrients is good for iris. Also could be a decrease in sun exposure.Helpful Reply
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Douglas Hunt on Mar 31, 2012I definitely would take a look at the fertilizer you are using and the planting depth. If neither of these things are the culprit, it is possible the cultivars you have are simply not happy in your garden. Try introducing a few new ones over time and evaluate how they do, replacing those that don't perform.Helpful Reply
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Carole on Mar 31, 2012Thanks everyone for the ideas. I have used 10-10-10 fertilizer, and the rhizomes are at least 25% above ground. I am hoping it is just the lack of enought mositure. My mother in law has some that have been in the ground for at least 20 years and are still coming up a blooming beautifully, just dont know, may try a few new ones an see what happens. They do have mulch on them. Could that be a problem?Helpful Reply
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360 Sod (Donna Dixson) on Mar 31, 2012Carole you may want to consider having a soil test run to see if their is something out of whack. I suspect that it might be over-fertilization but a soil test might aid in the diagnosis.Helpful Reply
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Douglas Hunt on Apr 01, 2012If you mulch the beds, Carole, you should pull the mulch off the rhizomes. They definitely should not be covered.Helpful Reply
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Merlene Reynolds on Feb 17, 2015Iris like very poor dry ground, and do not respond well to deep planting.. You can even lay them on top of the ground and cover with top soil and they will thrive.... Also they can not toll irate being to close to Oak and I think it because Oak is real acid and kills the blooms.Helpful Reply
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Carole on Feb 17, 2015Thanks everyone, I have thinned them and they are only mulched with just a sprinkling of pine straw, I am not going to fertilize them this year and see what happens.Helpful Reply
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Jeanette S on Jun 06, 2015I grow beautiful, bountiful Iris and here's what I do. Iris have a rhizome...that long tater. When you plant Iris and roots at the back where the foliage is. Cut off the foliage and plant with the roots buried, but only about half of the rhizome. If the Rhizome gets covered, they will not bloom...and they need to be separated occasionally. Do not over plant iris, that is space them pretty far apart so they can get going!Helpful Reply
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Carole on Jun 06, 2015Thanks I will definitely give you advice a try and thin them out this fall.Helpful Reply
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Wanda sinnema on Aug 02, 2015time to divide them.. like everyone has said, plant shallow, like poor soil do not mulch deeply.. less is better for them.. I remember my mom always sharing the rhizomes with friends at work while growing up.. she had 3 rows about 20 varieties.. always giving some away..Helpful Reply
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Carole on Aug 02, 2015Thanks Wanda, I plan to get started but it is going to have to get a little cooler, before I tackle that big of a project. Maybe half this year and half next year.Helpful Reply
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Sherry H. on Dec 23, 2015I just don't know, it fraggles me so. I have tried them in the sun and shade. They just don't bloom. They do have to be spaced . Maybe thats the reason. Let us knowHelpful Reply
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