a simple list of blackspot resistant roses....
serenasyh
14 years ago
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sammy zone 7 Tulsa
14 years agowesley_butterflies
14 years agoRelated Discussions
A blackspot resistance study
Comments (7)Thank you, Mike. I've added a field on my rose database for blackspot resistance, giving a P for perfectly resistant and then 1, 2, 3. I've lumped cercospora and anthracnose with it--I can't always tell the difference and the purpose is the same. So far, all my rugosas and most hybrid musks are P and all the modern hybrid teas and floribundas are 3. So are bourbons. I'll post the breakdown when I've finished it....See More2007 MBG List of Disease-Resistant Roses
Comments (18)MadGallica and Anne; I can testify to the existance of some strange new blackspot-like disease on rugosas. The last couple of years, I have had issues with every one of mine, to the point of wanting to get rid of them. Normally, I only get a little BS in the fall, but the rugosas seem to have disease problems as soon as they finish the first flush. Beause they get so big, they stand out like a sore thumb. Since I live in Montreal, maybe it is a problem that is so far restricted (more or less) to my area. The only Canadian rose I grow is Morden Blush, and have never had any speck of disease on it. I agree, the list is a little odd, but being in my area, it certainly gives me some ideas for resistant roses to take a look at next year. Judith...See MoreBlackspot resistant roses other than Knock-Outs
Comments (26)Far different zone and growing conditions than yours and all of my roses are own root as root stock does not do well for me. I had close to 350 rose bushes here. When I decided to go no spray it took two years to eliminate all take were not healthy. I was left with mostly Kordes, Ping Lim (Easy Elegance), Flower Carpet and a few misc. The midwest has the highest humidity index after the gulf states in the US. So good disease pressure here. However we don't have rust or downy mildew issues here. That I know of. I've had my kordes roses for ten plus years and many have been renamed.Ex.my Petticoat Fairy Tale is a gorgeous apricot orange pink blend. Size is 4' by 4' here starting with no cane in spring. Petticoat is now sold as a white rose. I only ordered the Kordes roses that have won an ADR that said none have ever had any disease at all. As a whole they grow much larger than their stated average size at least here in my yard. Buy Kordes adr roses you won't regret it. Ping Lim roses are sold own root. Don't know if you can get them on fortuniana stock if thats what you need.The best of the best is sunrise sunset (shrub type). Size here is 4' by 8'. All that I've tried are disease free but some have lacked in vigor. Other disease free roses in my yard are- Gartendirektor Otto Linne Kateryna Betty Prior Easy Does It Roserie de l'Hay Cape Diamond- don't prune it or will throw wild growth from every dormant bud on cane- ask if you wish to know more Flower Girl Home run White Out- thou I have heard some have problems mine has been perfect-own root don't now that it matters Pretty In Pink Sunshine Daydream Quietness...See MoreBlackspot resistant Bourbons
Comments (6)It's kinda something you have to figure out for your particular area. I have a few Bourbons here, and they vary with respect to blackspot resistance -- but that also has to do with the particular strains of blackspot in my area. The cleanest for me is 'Souvenir de Victor Landeau' but this is, unfortunately, no longer in commerce. If you look it up on HelpMeFind, the most recent pic is of my plant. Here, it doesn't get spotty leaves until about October, and then only on the lower 1/3. But honestly, by then it's of no concern to me, since everything is getting ready for sleep anyway. I'm hoping to propagate this in Spring, so if it catches your fancy, I'll put you on the list for one. 'Mme de Sevigne' is the next cleanest for me. Think of it as along the lines of 'Mme Isaac Pereire', but with even more of a climbing habit. So far for me, its canes are stiff enough to be basically self-supporting, so in my garden it's like a free-standing climber. If it gets too heavy with the first flush, I just prop it with a tree branch stuck in the ground. 'Honorine de Brabant' is a close third for me. It will get naked legs by mid-Summer, but the leaves it keeps are barely affected. The ones it loses seem more due to it growing up and out than disease -- those lower leaves just seem to become "no longer necessary" and are shed. But this is just the lower two feet or so on a rose that topped six feet by the end of the season. "Maggie" is a Bourbon often touted as being rather healthy, but mine is too young to comment about it. Mine came less than a year ago, and is all of 12" now. It kept healthy leaves so far. I also have 'Souvenir de la Malmaison', and it is also very clean here as far as blackspot goes. But mine is in a bit of a challenging spot right now, and it does get a touch of mildew when it's cold and wet. Here, that's just a bit in Spring before blooming, and again in Autumn. It's nothing major, and clears up on its own when it gets either drier or warmer -- or both. For me, 'Mme Dore' and 'Mlle Blanche Lafitte' will go naked in mid-Summer, then refoliate. But keep in mind that I don't use fungicides, so if you do, they'll likely be fine. For me it's not worth the trouble or the side-effects. There are three which come to mind as being notorious for blackspot issues -- 'Mme Pierre Oger' and its sport-parent 'Reine Victoria', and 'Louise Odier'. You didn't mention having them, so I'm just throwing that out there if you were considering them. But keep in mind that many people say the same about all the ones you did mention, except for 'Souvenir de la Malmaison'. So if those are doing well for you, perhaps you're not in an area as prone to blackspot. There are also a few Hybrid Perpetuals which lean toward the Bourbons in appearance. The class is really a hodge-podge -- basically, if it rebloomed at all and wasn't clearly one of the other types from that time, it got the Hybrid Perpetual label. So if you line them all up, you see how variable they are. One I'd recommend to someone looking for a "healthy Bourbon" would be 'Pierre Notting'. Note that there is also a Tea called 'Souvenir de Pierre Notting' -- I'm not talking about that rose. The one I mean is a somewhat like 'Mme Isaac Pereire' in habit and bloom form, but smaller in plant size and a deep wine-red in bloom color -- and also very fragrant. My plant is very healthy -- almost as clean as 'Souvenir de Victor Landeau'. But as I said before, keep in mind that that's how it is for me. One thing I'm finding with blackspot-prone roses is that if they are kept well-fed and well-watered, they will quickly replace shed leaves. In my garden, it's as though their first set of leaves is made for Spring conditions -- perhaps enduring some late frosts -- rather than Summer conditions. If blackspot makes those first leaves fall, the second set seems more "Summer-ready" and will last through the season. Of course, there are a small handful that seem to struggle anyway, and I just may give them a little help with sulfur this year. And I want to try giving everything a wash-down with Castile soap in a hose-end sprayer. Supposedly, it both washes off the spores and leaves a residue that prevents new spores from germinating. We'll see if that works. If you're not sure what will work for you, I'd suggest growing them in pots around the garden for a year or two before deciding to stick them in the ground. Of course, you'll have to deal with those potted roses for Winter. But I find it easier to dump a poorly-performing plant when I don't have to dig it out of the garden. :-) ~Christopher...See Moreserenasyh
14 years agowesley_butterflies
14 years agohidden oasis (7b)
7 years ago
Terri S
7 years ago
Vaporvac Z6-OhioRiverValley
7 years agoTerri S
7 years agoTerri S
7 years agohidden oasis (7b)
7 years ago
lavenderlacezone8
7 years agolast modified: 7 years agoVaporvac Z6-OhioRiverValley
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