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What is wrong with this rose
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Posted by
campv Arizona (
My Page) on
Sun, Oct 7, 12 at 17:22
| The rose is about 6 years old and about 5' tall, this time of year. It is on an east facing wall next to the house, with 6 other rose bushes. None of the other roses bushes have this problem and they are all treated the same. Same water, same sun, same spray etc. The bloom is about the size of a navel orange or small grape fruit. Other than the petal damage it is healthy. This is the way all the roses look on this bush. I don't recall what kind it is. Does any one know what is causing this petal damage. Thanks |
Follow-Up Postings:
RE: What is wrong with this rose
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| What spray are you using? The petal damage looks like it occurred while the rose was opening, not when it was forming or after it fully opened. Thrips can make your petals look like this. Both frost and sunburn can make the petals look like that. You're at a higher elevation than I am so you could have any of these events. |
RE: What is wrong with this rose
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RE: What is wrong with this rose
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RE: What is wrong with this rose
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- Posted by hoovb z9 Southern CA (My Page) on
Sun, Oct 7, 12 at 23:04
| It could be sun/heat toasting the edges of the petals. Some roses in the bud stage the petal edge pulls away from the bud and exposes that edge to heat and it toasts it. A cultivar-specific and color specific kind of problem. The deeper the color of the rose, the more vulnerable to toasting. Also the thickness or substance of the petals, and the thickness at the edge of the petals. Thicker ones hold up better. Just to be thorough, check for Thrips by shaking the bloom over a white sheet of paper. If there are Thrips you will see tiny brownish insects on the paper after a good shake, but after an Arizona summer, I wouldn't expect that, also no damage on your other roses in the same location. You might try an experiment: picking a few just as the sepals fall and bring them in the house and put them in a vase, and see how they open up, if they are damaged or not. |
RE: What is wrong with this rose
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| If it has been doing that all summer, I would first suspect sunburn. If it is just the current flush, I would suspect botrytis fungus, as Arizona has been having some rain and cool nights lately. |
RE: What is wrong with this rose
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| Hoovb-Thanks for the input. I know about thrips and have them on a regular bases. I thought they were only attacted to light colored flowers and like I said all the other roses on either side do not have this problem (light colored). I know its not botrytis the leaves and stems look great. I took another look at the buds just barely opening and the edges look the same, so it might be this rose is more sensetive to the heat than the others(like you stated) I also noticed that they do not open more than you see in the picture. What are sepals? |
RE: What is wrong with this rose
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| Michaelg- Thanks for your help. All the roses rest during the hot summer so very few blooms. If I remmember correctly this rose did the same thing last year this time. We have had no rain and the night have been around 55-60. Days have been around 85 so I just don't know. Anything else you can come up with would be appreciated. |
RE: What is wrong with this rose
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- Posted by hoovb z9 Southern CA (My Page) on
Mon, Oct 8, 12 at 12:01
| Sepals are the green covers on the rose bud before it opens. Might be 'Fragrant Cloud', which is sensitive to heat. Is it very fragrant? |
RE: What is wrong with this rose
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Dark-colored rose.
Up against a white wall.
Arizona. SoCal has had about 2.5 months of mostly-record-setting heat. Even here at the California coast, it's been hot enough to turn dark-colored roses (and even many pale ones) to potpourri. In gardens I've visited in AZ, kept by really serious rosarians, the roses were shaded, much of the year, by little tents made of shadecloth. The tents weren't glamorous, but the roses weren't fried. Jeri |
RE: What is wrong with this rose
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- Posted by campv Arizona (My Page) on
Mon, Oct 8, 12 at 14:29
California -sorry about the heat but it happens there, lived in N San Diego Co. all my life. No the crunchies very well, thats what happens here in July and August, but not here in Oct. We live just south of Sedona which is much cooler then Phoenix.
Hoovb- It has a very soft smell not strong like a dbl. delight also the picture is light it is more of a fusha color. Thanks Again everyone |
RE: What is wrong with this rose
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- Posted by seil z6b MI (My Page) on
Mon, Oct 8, 12 at 20:08
| In your zone that's sun burn and a lot of dark red roses get it. If it were mine, and with the chilly weather we've had lately, I'd say it was frost bite, lol. But then they're both burns of a kind so that's why they look alike. You don't say what rose it is but my Oklahoma looked just like that this July when the temps were steady in the high 90s every day. I wouldn't worry about it too much. Just keep it watered and the next bloom should be fine if the temps come down. |
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