Help! What is this on my rose leaves?

2 years ago

Only one of my rose seems to have this problem. Not on older leaves. Please see comments for pic coz it wont post here..

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Comments (5)

ladybug A 9a Houston area
Original Author
2 years ago
ladybug A 9a Houston area
Original Author
2 years ago
Did some searching and it looks like rust? A couple other Rose's also seem to have it. How do I deal with it? Prune everything off?
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Brown tips and edges of leaves can be caused by heat stress, moisture stress, or excess salts from fertilizer or spray. These factors can reinforce each other, and there is less room for error with potted plants. The sodium in the soap may have contributed, particularly since you didn't measure. It might be wise to change to commercial insecticidal soap to get a consistent product with instructions for how much to use. Also those potassium-based soaps are better for the plant. Different brands of dish soap are more concentrated than others, and the formulas can change over time. But I've used Ivory liquid at 1 TSP/quart without harm. However, I mostly ignore aphids until the predators control them.
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Help! What is wrong with my rose leaves?
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Comments (16)
Your ph is a little high and the roses may be re-acting to it as this can cause what looks like to me as a mild manganese deficiency starting. If it is, the leaves will go to a brighter yellow. I would give the roses a rest from any spray or fertilizer. Just water and see if the new leaves are normal looking. If they do go yellow then there is a foliar spray for mineral deficiencies. Don't give up on the roses as there is always some thing you can do to solve most basic rose problems.
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Browning leaf tips usually do mean it's not getting enough water. But that said, if your indoor temperatures are not very warm it may be a good idea to let it go dormant for the winter and keep it very lightly watered. The leaves may drop but that's better than the roots rotting. Or if you can keep your temps above 70 degrees and plenty of sun exposure, you may be able to increase watering and keep it actively growing indoors. I had the same problem with mine last winter. I didn't water enough but they were warm enough that they didn't really want to go dormant, but I forced them dormant anyway for lack of enough water. Soon as I was watering them more, they fattened up and put out new leaves.
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some leaves of of my rose plants are turning yellow need help
Q
Comments (2)
My guess would be iron deficiency, or over watering can do it too. Is it on new growth only? There is a lot of good info in this thread http://forums2.gardenweb.com/discussions/1663016/iron-deficiency-in-some-rose-varieties
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User
2 years ago
That is not Rust. Have you applied anything to the plants in recent days, and if so, what was the weather like that day?
ladybug A 9a Houston area thanked User
ladybug A 9a Houston area
Original Author
2 years ago
Thank you Paul. I dont spray, atleast not started yet as I keep thinking each year that I need to start because of blackspot and thrips. Not have not done anything lately. Maybe watered with some seaweed a few weeks ago. It's been cooler than normal, 60 to 80 degrees. We did get some rain a week or so ago. Only 3 Rose's out of several in a row are affected, and they are not close to each other. Not sure what is going on. Removing most of the affected leaves for now.
User
2 years ago
It looks like something has gotten on the foliage and caused a burn.
ladybug A 9a Houston area thanked User

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Help! What is this on my rose leaves?

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ladybug A 9a Houston area
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ladybug A 9a Houston area
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Help! What is this on my rose leaves?

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ladybug A 9a Houston areaOriginal Author

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ladybug A 9a Houston area
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ladybug A 9a Houston area
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ladybug A 9a Houston area
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