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Chicago Peace, very strange

BethC in 8a Forney, TX

7 years ago

I have three Chicago Peace right beside each other. All were purchased at the same time from the same place.

Two of them have almost completely defoliated from blackspot and haven't re-bloomed since their first flush.

The third one has absolutely gorgeous foliage, hasn't dropped a single leaf and has about 15 buds on it. It had the same first flush as the other two.

Any suggestions on why this has happened?

Featured Answer

oldrosarian

7 years ago

Many gardeners think that there is only one type of black spot but there are quite a few strains of it. The rose that stayed healthy had better resistance to the strain from where it was grown and got BS. The other two were prone to this strain and so re-act badly. But next year if there is a new strain of black spot in your garden, the healthy one may look poor and the other two will be healthy. Don't give up on these roses because roses can regrow three sets of leaves before it effects the vigour of the rose and starts to kill it. I have got roses from a nursery that had bad BS, dropped all their leaves and then grew healthy ones. If the BS they got from where you bought them isn't in your area, they have a good chance of being healthy when the new leaves come. Certainly next year they will give you pleasure.

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Comments (6)

dublinbay z6 (KS)
7 years ago
The erratic nature of Chicago Peace.

I grew some years ago. I never saw any particular pattern, but sometimes it would break out in heavy BS, other times not. I finally could take its erratic nature any more, spaded it, and haven't grown one since.

But I have to admit those blooms are simply gorgeous!

Kate
jim1961 / Central Pennsylvania / Zone 6
7 years ago
last modified: 7 years ago
I'm guessing it's just BS prone for your area but the resistance on the one CP is stronger for whatever reason...The one CP might get BS later in the season... Who knows?
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BethC in 8a Forney, TX
Original Author
7 years ago
They are on my short list to shovel prune them. A few more too. I contacted the local Rose society and no one wanted what I want to get rid of. I wouldn't offer them to neighbors who only want easy to care for roses. It makes me sad because they all have beautiful blooms.
zack_lau z6 CT ARS Consulting Rosarian
7 years ago
The leaves have to stay wet long enough for the spores to germinate--perhaps the one that has leaves dries off faster? Perhaps it doesn't get as wet?
ValRose PNW Wa 8a
7 years ago
Hi BethC, I'd like to know how long that they have been in the ground. If they where planted recently then maybe 2 of your roses are going through transplant shock.

I find roses of the same varieties cycle together, getting blackspot at the the same time and bloom at the same time . What you are describing it very strange. Can we see pictures, please?

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