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Black spot 2nd year in a row. Thinking of ditches roses for good.
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Posted: May/28/2008 6:22 PM PST
This year may be the last time I try to get this darn blasted blackspot under control. I know it came from a bush that someone gave me, though I didn't realize it at the time. Now my whole rose garden is affected. Out of 5 bushes, one has died, one is completely defoliated, and three have had all the diseased lower leaves removed. I'm thinking of scrapping the whole thing and planting something else. The warm winter we had may have made the problem worse. They never lost their leaves and started blooming in March. Is it possible to clear the whole bed and start with new roses? I'm scared that it's in the soil and will attack again. Any suggestions? Thanks in advance. |
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Posted: May/28/2008 8:34 PM PST
Maybe give some of those "Knockout" roses a try. They were developed for low maintenance and resistance to black spot and powdery mildew. |
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Posted: May/28/2008 9:23 PM PST
We use fungicide on ours. Even so, some roses are just bound to get blackspot. I am trying a carpet rose this year. They are suppose to be resistant. |
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Posted: May/29/2008 10:50 AM PST
THe fungus definitely can get in the soil, so unless you can move the roses, that location may be the soil equivalent of 'tyhpoid mary'. I have started using RosePharm, an organic spray of herbal oils that doesn't necessarily kill the spores but prevents their spread. Any soap spray solution might do the same thing. Certainly, getting BS resistant bushes helps, but we all love those tender hybrid teas, don't we? If you are dedicated to trying to save your existing plants, keep pruning affected limbs, pick off and discard (NOT in the compost) affected leaves, and remove dead leaves from the ground. I am not aware of any treatment for the soil - maybe someone will stop by with an idea there. Good luck - I know how hard it is to see your roses die - I've lost two Barbra Streisands and refuse to buy another, as much as I love that rose! |
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Posted: May/30/2008 10:30 AM PST
Thanks for the input, guys. I'll keep it all in mind. |
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Posted: Jun/07/2008 4:25 AM PST
I am wondering if something called micro-riser will improve the soil and help to rid the soil of the problem. I think that it is sort of a pro-biotic for the soil. I actually have such poor soil that I use it just to improve conditions. |
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Posted: Jun/16/2008 2:23 AM PST
Knockouts are a good choice an there are several other choices of Buck roses to choose from. Knockouts come in yellow, cherry red, double red, rainbow an pink. Also think about Heirloom roses, they have stood the test of time. I am assuming you have all Hybrid Teas here. I've never had any luck with the "new" roses either, an refused to grow them because of all their problems, then I discovered the oldies. Just a thought. |
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