What disease is this?

Safa1July 19, 2014

My Double Delight rose is getting some of its ;eaves turned red from the tip - it has happened on my other roses before too- is this a watering issue ora disease?
Many thanks

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seil zone 6b MI

Where are you at? At least what zone? Has it been very hot where you are? It looks like burn to me. If not from heat maybe from spraying something?

    Bookmark   July 20, 2014 at 12:03PM
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Safa1

I am in Palo Alto, in Silicon Valley - Zone 9. I haven;t sprayed it recently, and though it has been a little hot, I think it get enough water (daily).

    Bookmark   July 20, 2014 at 2:57PM
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dublinbay z6 (KS)

Too much fertilizer? I don't really know--just guessing.

Kate

    Bookmark   July 20, 2014 at 4:03PM
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campv

My two DD's look like that and it is heat this time of year. I find leaves on DD to be highly sensitive to just about everything. Sun and heat.

    Bookmark   July 20, 2014 at 4:16PM
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hoovb zone 9 sunset 23

That's undoubtedly sunburn. When heat waves are predicted, give your rose a soaking at the roots on the first day of the heat spell. That will help.

    Bookmark   July 21, 2014 at 10:57AM
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michaelg(7a NC Mts)

Did you fertilize recently? If so, flush the soil with plenty of water. Excess nitrogen in ammonium form produces this look. Heat, scant water, and fertilizer can all contribute to burn. The plant will recover.

    Bookmark   July 21, 2014 at 4:11PM
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