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Rose black spot.

Hi, my name is Linda and my question is about Rose black spot. I know about clearing away leaves and cutting back etc., but what about treating with fungicide over winter? Has anyone any experience? Should I wait until after the winter cut back before spraying and then at regular intervals as suggested by the manufacturer of the spray, or would anyone recommend spraying during the winter months? This is my idea of getting completely rid of any traces. If so, what would you recommend using and how often would you treat the rose?. Many thanks in advance for any tips and information. We are three rose fans, neighbours and friends who all have the same problem!

Posts

  • Lizzie27Lizzie27 Posts: 12,494
    Personally I wouldn't spray because it's a never ending and expensive solution and it's not good for pollinators. You don't spray in winter, only when the new leaves start to appear and then you have to keep on doing it I believe once a month. I started doing it but gave up pretty soon when I realized just how expensive it was going to be.
    I just learned to live with it, it usually doesn't get bad here until the autumn and that's okay with me.
    North East Somerset - Clay soil over limestone
  • Some roses are more susceptible than others to black spot - it's worth looking for resistant ones if you can.  It's also worth persuading yourself, if you can, that perfection is probably not possible, so you don't beat yourself up about it if your roses have a bit of black spot.   :)
    Since 2019 I've lived in east Clare, in the west of Ireland.
  • Thanks for your comments. My roses are not bad at all because I keep on top of the fallen leaves but my friend is having a lot of problems and therefore my idea to use fungicide at regular intervals throughout the winter. Any comments on such use would be highly appreciated. Again thanks for your reply!
  • Hi Lizzie,
    I did not see your reply at first. Sorry. Thanks also four your advise. Most of the fungicides say spray from spring onwards but I had read in a few books on roses where the author advised to disinfect the rose throughout the winter and I was not sure if they meant to use a fungicide spray or how to disinfect the rose. None of them explained this process. Thanks again for your reply!
  • Pauline 7Pauline 7 Posts: 2,246
    Our rose expert is @Marlorena . I have tagged her....hopefully she will be able to help. 
    West Yorkshire
  • Thanks a lot Pauline! Much appreciated. Perhaps I should add that I personally don´t get so many problems because I cut stinging nettles in summer and after 4 days bottle some up for spraying against various problems. The rest I let stand for a further 4 weeks and then use it sieved as fertilizer. I also started putting garlic bulbs, cut into slices around the roots of my first infected roses with with black spot and I was continuously hunting for the drop off leaves which I kept clearing away or I cut off badly infected stems. This problem arose on one certain rose which I have never had problems with in the past. My two friends did not do this and were consequently hit badly this year. We live in Germany and this year was a great year for roses again but this problem seems to have been a big one for a lot of people over here during the past few months. 
  • OmoriOmori Posts: 1,674
    You can treat the soil and stems during the dormant season with Sulphur Rose, I’m not sure how much difference it makes but could be worth a try. 
  • YviestevieYviestevie Posts: 7,066
    Unusually it was a bad year for blackspot in my garden.  I think the mild winter was the main cause of the problem.  It meant that many leaves stayed on the plant and so were not cleared away when I raked up all the fallen rose leaves.  This year I am going to remove all the rose leaves over the winter.  Clear up any that drop on the floor and give all the roses a good mulch to stop the spores from bouncing back up onto the plant.  I also spray but only at the very start of the season before the insects get active.  I find this helps a lot.
    Hi from Kingswinford in the West Midlands
  • Hi Omori and Yviestevie, Thanks for your tips. You have confirmed, with the other comments,  more or less my ideas and I will pass them onto my friends. Thanks for taking the time to post your tips everyone!
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