Irises forum→Bearded Irises

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Name: Granpops
England South Yorkshire
Granpops
Oct 16, 2021 2:27 AM CST
This year I've had no flowers from my irises, unlike previous years when I've had a good display.
Has anybody else suffered the same and what do you think is the reason.
My plants are relatively young, 2-3 years old.
Name: Andrea Reagan
Astatula, Florida (Zone 9a)
I collect seeds
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Kevalsha
Oct 16, 2021 4:34 AM CST
Hi! Granpops; I live in Florida and some of my bulbous plants such as Amaryllis have not flowered either. The ones that have flowered are also very few unlike other years.
Kevalsha
Name: Lynda Horn
Arkansas (Zone 7b)
Eat more tomatoes!
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gardenfish
Oct 16, 2021 5:39 AM CST
Bearded iris often have the main rhizomes die over the years, but the main rhizome grows a new, smaller rhizome. The new rhizome may take several years of growth before producing blooms. I have a large section of bearded irises in my perennial garden that have been there for 7 years, and I don't always have the original colors bloom every year.
Iris should be dug up every couple of years, the old, rooted parts cut away, and the newest rhizomes re planted for optimum health and flowering. I'm very tardy in getting this done. *Blush*
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Name: Robin
Melbourne, Australia (Zone 10b)
Region: Australia Irises Garden Photography Cat Lover Seed Starter
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Totally_Amazing
Oct 17, 2021 4:39 PM CST
Welcome! to the forum Granpops Smiling

It may also be possible that the irises have used up all the nutrients in the soil. I usually apply a thin layer of new topsoil each year over my irises.

There is a good answer to your question in one of my old iris catalogs from an iris expert:
"This can be caused by a number of factors and usually a combination of more than one. Planting in too much shade. Overfeeding with animal manure or blood and bone, or the reverse no feeding of anything. Planting too deep.... Mulching with lawn clippings and other organic matter. Over or under watering can also cause problems. They need replanting every 2 to 3 years or overcrowded starved iris will not flower". The ideal planting depth varies depending on your weather conditions. He also mentions that weeds and ground covering plants should be cleared away from the irises.
Name: Sherry Austin
Santa Cruz, CA (Zone 9a)
Region: California Irises Keeper of Poultry Roses Dragonflies Birds
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Henhouse
Oct 17, 2021 6:57 PM CST
I'll add one more, to the list you provided, Robin..
Iris don't like root competition. Tree roots can quickly move into a bed where the soil had been tilled, fertilized, and amended.. They can be greedy sucking up all the nice nutrients.
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[Last edited by Henhouse - Oct 17, 2021 9:24 PM (+)]
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Name: Evelyn
Sierra foothills, Northern CA (Zone 8a)
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evelyninthegarden
Oct 17, 2021 11:02 PM CST
Henhouse said:I'll add one more, to the list you provided, Robin..
Iris don't like root competition. Tree roots can quickly move into a bed where the soil had been tilled, fertilized, and amended.. They can be greedy sucking up all the nice nutrients.


I agree
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