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Yellow and green spots on rose leaves

rledonaldsonrledonaldson Posts: 11
in Problem solving
Can anyone tell me what these spots are on the leaves of my roses. Do I need to do anything about it? 

Posts

  • BorderlineBorderline Posts: 4,700
    The pictures show rose black spot. Very common, especially towards the later part of summer. Usually made worse due to humid and damp conditions. There is not a lot that can be done to remove them, it's more about prevention and limiting the spread.

    As the leaves drop, promptly remove them from the base. In the winter time, rake off any leaves and scrape off the top inch of soil and replace with a new layer of compost. Hopefully next year, you start fresh.
  • rledonaldsonrledonaldson Posts: 11
    Borderline said:
    The pictures show rose black spot. Very common, especially towards the later part of summer. Usually made worse due to humid and damp conditions. There is not a lot that can be done to remove them, it's more about prevention and limiting the spread.

    As the leaves drop, promptly remove them from the base. In the winter time, rake off any leaves and scrape off the top inch of soil and replace with a new layer of compost. Hopefully next year, you start fresh.
    Thanks for the response, I tried spraying the rose plants with fungicide yesterday although leaves are so turning yellow so not sure if there's much else I can do. 
  • Jason-3Jason-3 Posts: 391
    Fungicide, feed and cut back is about all you can do. At some point all roses will a degree of black spot. I guess its how bad yours are. Out of all my roses I think only 2 don't have any sign of BS currently.

    I have noticed a link between severe BS and when the plant has been damaged by the wind and now rocks when touched or when the wind blows. If this is case with your own I'd suggest firming it back in and applying a heavy mulch
  • MarlorenaMarlorena Posts: 8,705
    This is once again really nothing to worry about and you should not be reaching for a fungicide bottle for this minor leaf issue.   All you are doing is keeping the chemical manufacturer's  happy and wasting your money as a result..

    You may have a mixture of minor black spot and perhaps some mineral deficiency.  Nothing uncommon in that.   Black spot occurs when temps consistently reach about 21c 70F with high humidity levels, which is what we get from mid June onwards here.  It happens... 

    Here are some photos of one of my roses today.   Do I worry about this? not at all..
    and neither should anyone else really... just pull off the manky leaves..

    ..you will soon get nice news ones, like this...

    ..still producing blooms.. and I don't worry about aphids either... they're food for something else..



    Please try and enjoy your roses, and try and accept something less than perfection at this time of year.. dryness at the root, heat, humidity, mineral issues, all after the main first flush is over, you get this sort of thing.. just remove the worst affected foliage, even if you have to totally defoliate the rose, it will soon reshoot..


    East Anglia, England
  • ChrisWMChrisWM Posts: 214
    Very helpful guidance as ever, @Marlorena.  What rose is the pink bud at the bottom of your post?
    If you have a garden and a library, you have everything you need. Cicero
  • MarlorenaMarlorena Posts: 8,705
    Oh thanks Chris.... that's 'Baronne Prevost',  an old hybrid/damask perpetual rose introduced originally in 1842 bred by Jean Desprez, a noted French breeder of roses..[Baronne is female so named after a lady]... roses like these do get diseases and one has to accept that, otherwise you don't grow them.... I never spray roses for any reason...  
    I appreciate your interest...


    East Anglia, England
  • MarlorenaMarlorena Posts: 8,705
    @ChrisWM

    I actually grow it on an obelisk with a rose called 'The Generous Gardener' a David Austin rose.  You can see them both here at the top of the obelisk flowering together, photo from a couple of weeks ago..


    East Anglia, England
  • ChrisWMChrisWM Posts: 214
    Interesting, @Marlorena.  Thanks.  It returns my thoughts to my DA “James Galway” - my first rose, and a test of my ability and patience as a novice gardener.  I’ve resorted to growing it as a shrub this year as you may recall, but despite DA’s team’s advice, may try an obleisk next year. 
    If you have a garden and a library, you have everything you need. Cicero
  • MarlorenaMarlorena Posts: 8,705
    @ChrisWM... sure, you can watch how it grows and then you can feel your way around with it, learning as you go, and then decide if you want to experiment and train in a different way...  it's good to be adventurous with roses...
    East Anglia, England
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