Irises forum: What's happening?

Views: 310, Replies: 3 » Jump to the end
Name: Darcy
Reno, NV (Zone 6b)
Jun 2, 2017 9:06 PM CST

Thumb of 2017-06-03/djinnevada/7e5e05
So. On several of my iris the buds are sort of getting squishy before they can open. I thought it was the black bugs I had posted about earlier, but the entomologist ruled them out. Here is a photo of the bloom right above it, which was just fine.
Thumb of 2017-06-03/djinnevada/e1d2fb
I am also finding that "dry" rot on the underside of a bunch of my iris rhizomes, some with the flower problem and some without. Not sure if it's related.
(Zone 9b)
Region: California
Jun 3, 2017 12:15 AM CST
What kind of rot are you experiencing on your rhizomes? Are they soft and spongy? Are they soft and squishy with a bad smell? Are they drying up and shriveling up?

As for the squishy bloom...that's how my blooms look after a "hot" day in the sun.
Name: Tom
Southern Wisconsin (Zone 5b)
Irises Vegetable Grower Butterflies Region: Wisconsin Keeps Horses Cat Lover
Dog Lover Keeper of Poultry Daylilies Celebrating Gardening: 2015
Jun 3, 2017 4:24 AM CST
I've had some stem rot this year. Some blooms got rot right at the base of the flower and fell off. Some got rot right in the bloom, which looked a lot like your picture.
I am not afraid of an army of lions led by a sheep; I am afraid of an army of sheep led by a lion. - Alexander the Great
Name: Arlyn
Whiteside County, Illinois (Zone 5a)
Irises Beekeeper Region: Illinois Celebrating Gardening: 2015
Jun 3, 2017 6:46 AM CST
I've had he same tings as Tom described........more often than usual, this spring. Lots of rain, here, and then really warm temps is what I'm blaming Shrug! . I'm not sure about YOUR conditions, there.....I doubt you've had "lots of rain", there, but, maybe as Rob said.....the hot sun is causing the buds to "abort" Shrug! .
As to the rot.......there are a couple "kinds", with different causes, so I would suggest sending a sample to your University Plant Pathology lab (Your County Extension Agent should be able to help you do that) and then take the recommended steps.

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