Peonies forum: cladosporium

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Name: kathy
Michigan
Zone 4b, near St. Clair MI
Cottage Gardener Lilies Organic Gardener
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katesflowers
Apr 1, 2017 2:34 PM CST
@magnolialover
I love my vintage peonies, but I don't love the brown leaf spots. I do clean and dispose of all foliage in fall, deadhead before petal drop, but have never used a fungicide.
Can you recommend a type, brand that works?
This spring I am trying drug store peroxide [4oz/gallon] root drench for my clematis wilt problem. I'm thinking since my peonies have not broken ground yet, maybe it is time to address the black spot.
"Things won are done, joy's soul lies in the doing." Shakespeare
Name: Jerry
Salem, IL
Charter ATP Member
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Oldgardenrose
Apr 1, 2017 8:18 PM CST
Found this after searching for peony leaf spot. May be of some help. My advice is never water peony foliage.
http://www.missouribotanicalga...
Name: Jerry
Salem, IL
Charter ATP Member
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Oldgardenrose
Apr 1, 2017 8:27 PM CST
https://en.wikipedia.org/wiki/...
Name: Tracey
Wisconsin (Zone 5a)
Forum moderator Hybridizer Tomato Heads Pollen collector Hosted a Not-A-Raffle-Raffle Cat Lover
I was one of the first 300 contributors to the plant database! Plant Database Moderator Charter ATP Member Garden Photography Seed Starter Region: Wisconsin
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magnolialover
Apr 2, 2017 6:25 AM CST

Moderator

I haven't really ever used a fungicide. I don't water foliage and am always careful to clean up old leaves and debris at the end of the season to lessen any chance of pathogens overwintering.
Tracey
Name: Liz Best
Elizabeth Colorado (Zone 4b)
Peonies Enjoys or suffers cold winters Winter Sowing Region: Colorado Plant and/or Seed Trader Irises
Hummingbirder Cat Lover Lilies Daylilies Dog Lover Celebrating Gardening: 2015
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LizinElizabeth
Apr 2, 2017 7:24 AM CST
My only damage to the leaves is from hail, at least early in the season. Late season I don't think you can avoid it on some varieties regardless of treatment. I agree with Jerry though--drip lines (or ground watering however you manage it) is the way to go.
LizB
Name: kathy
Michigan
Zone 4b, near St. Clair MI
Cottage Gardener Lilies Organic Gardener
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katesflowers
Apr 2, 2017 8:17 AM CST
Thank you, Jerry, Liz, Tracey
just the info I am looking for.
I think I'll look into Mancobez fungicide.
Here in Michigan, I don't need to water. My perennial beds have weed mat, and 4" of mulch and very good drainage [amended sandy loam]. We get ample rain during the growing season. And that is probably part of my problem.
"Things won are done, joy's soul lies in the doing." Shakespeare

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