Ask a Question forum: Graham Thomas Rose Pest

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Savannah, Georgia (Zone 8a)
willsjamie
Mar 22, 2018 11:24 AM CST
I ordered a Graham Thomas from Heirloom a few months back. I spotted black spot on its leaves and have treated it for the last five weeks with Bayer's Black spot treatment for roses and shrubs. Do you think the images below are still black spot on it's leaves or something else? I'm pretty new to growing roses and I don't want it to fail.

I've got an Earth Angel rose in a container that can't possibly be doing any better. I don't see why the Graham Thomas is struggling like it is.

Can anyone help?

Thumb of 2018-03-22/willsjamie/d03a56
Thumb of 2018-03-22/willsjamie/b97334

Name: Philip Becker
Fresno California (Zone 8a)
Image
Philipwonel
Mar 22, 2018 12:01 PM CST
I'm going to take it for granted, that you followed label directions.

Damage to existing leaves, isn't going to go away.

I don't see any new growth.

Any sudden temperature swings ?
Alot of rain ?
Is the ground allowed to dry a few inches before watering ?
All important, let us know.

Otherwise, I would suggest getting a rose food with systemic pesticide.

We, and I'd, like to hear back from ya. Ya hear ?👍😀
😎😎😎








Anything i say, could be misrepresented, or wrong.
Savannah, Georgia (Zone 8a)
willsjamie
Mar 22, 2018 12:16 PM CST
Hi. Thanks for your reply.

Oh yes, I followed all planting and pesticide application instructions to a T.

I pick off the affected leaves. The temperature has fluctuated a lot here. It was mid 80's the other week and now it gets to below freezing at night to 50's for daytime highs.

I hope the soil is allowed to dry but with the rain we've had, probably not completely allowed to dry.

I've got the Alaskan Fish fertilizer recommended by Heirloom and I fertilized about a month ago. How often do you recommend?
[Last edited by willsjamie - Mar 22, 2018 12:17 PM (+)]
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Long Island, NY (Zone 6b)
Garden Ideas: Level 1 Celebrating Gardening: 2015
MargieNY
Mar 22, 2018 8:02 PM CST
willsjamie, I believe part of your answer is in one of your own statements.
"I've got an Earth Angel rose in a container that can't possibly be doing any better."
1)If it were my own root rose I would plant it in a container. I would carefully, gently transplant this rose Into a pot with "drainage holes" with a mixture of compost and organic potting soil. The potting soil should be organic. I would NOT use a potting soil that contains a granular fertilizer. It will void your guarantee and possibly kill the roots. After planting I would use diluted Alaskan Fish fertilizer once. Than follow up with plain water at regular intervals. I would fertilize using the Alaskan Fish every 3 to 4 weeks. Then site the containers into a sunny area.
2) Early tomorrow morning I would water the rose while still in the ground. The weather in your area tomorrow calls for Sunny, temps 66/48 degrees. In the later part of the afternoon I would follow the suggestions in the above first paragraph.

3) I would leave both roses in the containers till they have built up a sufficient root mass. At that point, I would plant them in the ground with mulch in a sunny area.
4)I don't know what type of soil you have in your garden. But it would be worth it to test the pH where you intend to plant your roses. I see from your photos that there are some bordering rock-like decor. If they are composed of cement it is possible they might have lime in them - (alkaline). I would test the pH in that area.
Lastly, I would use rainwater as opposed to tap water whenever possible.
Keep in mind, container planting requires more frequent watering.
5) As for the fluctuating temps, containers can be moved temporarily into a garage or sheltered area.
Please feel free to join the Rose forum.
Savannah, Georgia (Zone 8a)
willsjamie
Mar 23, 2018 3:18 PM CST
Thank you for the response. This rose actually was planted a few months ago in a different location but due to snow and other factors, I had to transplant it to this new location. It's been planted here for about 5-6 weeks. I hate to dig it up yet again, but I'll do what's needed.

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