Zephirine Drouhin mildew problem

jude2009

14 years ago

I have Zephirine about 8 years on a arbor it has always been a black spot magnet. This spring I took the arbor down and cut Zephirine down to about 5 feet.It bloomed from top to bottom and to my surpirse very little black spot. However now I notice mildew which it never had . My Question can size be a factor in which fungal disease a rose gets.

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strawchicago z5

2 years ago

My ZD is 6th-year-old own-root, never see blackspots nor mildew on it. Own-root roses are always healthier than grafted. Low-thorn-own-roots have cluster roots that spread out, thus more efficient in getting water & nutrients. Mine is planted on top of rock-hard clay (lots of limestone rocks below), so its roots go down to get calcium & potassium from the rocks. I pruned mine down to 3 feet after blooming.

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Comments (7)

jerijen
14 years ago
FWIW, out here on the West Coast, I find that some roses mildew for the first few years.
Then, when they really put on some substance, they seem to gain immunity to it.

I didn't know ZD was a blackspotter.
I've often heard complaints about mildew with her.

Jeri
hartwood
14 years ago
I don't know where you are in Zone 7, so I'll answer based on my location. Zephirine Drouhin is VERY prone to defoliation from blackspot here. (The first time I saw it in person was in a no-spray display garden in August years ago -- it was leafless.) This is the reason I waited till just last year to add her to my own garden ... I didn't know whether I could handle it or not. Bayer fungicide, applied every two weeks or so, has kept the blackspot to a level that I can accept. I have ZD paired on an arch with her 'sister' Kathleen Harrop.

If you're in the East, your mildew may be more a function of weather than plant maturity. This year, with it's unusually cooler and wetter weather so far this summer (until Monday, that is), has been great for mildew.

Connie
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Thanks for sharing such a beautiful lovely ZD! She clearly loves your climate. I really wanted to grow her, fragrant, thornless climber that can handle shade, what’s not to love. But once I read about how badly she mildews in California and seeing the specimen at Huntington Garden near my house in such a bad state I decided against it. But I realized there was another thornless pink climber, Climbing Pinkie, and so I got her last fall from ARE. Here she is just putting out her first cane that you can barely see in the shadows. The backs of her leaves have prickles, but otherwise so far completely thornless and a light fragrance, although ZD should be much more fragrant. For anyone in California she has spotless glossy foliage. I have her planted so she can eventually climb along the cable fence between our yard and the neighbors and we will be walking closely by to get down our respective narrow 5 ft wide side yards, houses are 10ft apart here, so I hope she stays thornless.
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scardan123
14 years ago
Here ZD is known as a mildew-magnet, I mean, even some catalogues sell it with a warning for mildew! This I why I never bought it. I did not know it is also BS-prone...
Doesn't sound like a great rose, alltogether, uhm? ...
catsrose
14 years ago
I put ZD on the arbor leading to my front door. After her spring flush, she regularly degenerated into a leafless bundle of blackspot twigs. Embarrassing! So I cut her back and moved her this spring. She is now in a shadier spot and she is doing much better. I have sprayed this year for the 1st time since bs has been so bad. I have her, so I'll keep her, but I wouldn't get her again. Definitely an overrated rose. Kind of like a Persian cat--gorgeous when she's clean and combed, but a pain to keep her that way.
susz52
14 years ago
For so many it is one of the odd summer weather cycles. I'm seeing some mildew and having to treat for it. For me at this time of year I never had to do this before and on roses that haven't had a problem in the past. I don't think I can judge a rose this year on mildew problems but if I see it next year I may SP a few.
beboldoritalic
2 years ago
I bought a ZD and haven’t planted it yet because it’s been so rainy here in MA. Today I noticed that it has Powdery mildew on the newest growth. Does anyone know if it’s better to cut the canes with mildew down or use a fungicide. And what fungicide has been successful for people? Lastly, should I plant it or wait to see if it responds to cutting or treatment?

Zephirine Drouhin mildew problem

strawchicago z5

Comments (7)

jerijen

hartwood

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