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Does anyone know what is causing this?
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Posted by
julie_2006 Sunset zone 16 (
My Page) on
Fri, Jun 13, 14 at 23:04
| My Commonwealth Glory HT has some very strange-looking blooms. Sort of flat on top and brownish-green in the center with deformed petals. Please see photo....I'm not much of a photographer, but you get the idea, I hope. Is this caused by a disease or a bug/worm? |
Follow-Up Postings:
RE: Does anyone know what is causing this?
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- Posted by seil z6b MI (My Page) on
Fri, Jun 13, 14 at 23:49
| It's hard to tell but possibly thrips? |
RE: Does anyone know what is causing this?
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| Proliferation? It can be caused by high N levels -- some varieties are more prone to this than others. |
RE: Does anyone know what is causing this?
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- Posted by hoovb z9 Southern CA (My Page) on
Sat, Jun 14, 14 at 9:16
| It looks like proliferation to me as well. You'll see that on particular varieties, mostly in the spring. I've had some roses grow out of that-- my Rouge Royale did that for several years, but these past two has not done it at all. |
Here is a link that might be useful: Pat Welsh on proliferation.
RE: Does anyone know what is causing this?
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| Proliferation and bullnose (bullhead) are caused by a genetic susceptibility and triggered by cold weather at a very early stage of bud development. It's basically a birth defect. You can't do anything about it except pull off the flowers so you don't have to look at them. The nitrogen theory may seem plausible, but I think it has been discredited. |
RE: Does anyone know what is causing this?
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| I also understand that the nitrogen theory has been discredited. Some roses just DO that. In fact, some few roses do that more than they bloom normally. Austin's 'Fisherman's Friend' is one that did it here constantly. GOOD blooms were lovely -- but they were rare. So it is No Longer With Us. |
RE: Does anyone know what is causing this?
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| Thank you all for your input. I thought maybe thrips were to blame, but a closer look inside the bloom leads me to think proliferation is the answer. I'm glad to hear that possibly a rose can grow out of it. I hope mine does, because I love this rose! |
RE: Does anyone know what is causing this?
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| Yup, proliferation. Michael, grow Tequilla Sunrise. Every time I fed it anything with nitrogen, it threw proliferated blooms until the nitrogen either flushed through or was mostly used up. I could force that one to proliferate. Kim |
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