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rose plant problem

Juniper4Juniper4 CheshirePosts: 77
Hi all Rose lovers,
I have a rose plant that has got lots of black spots on its health green leaves that then turn yellow.
I have also noticed that the stems have turn to a brown woody looking colour. 
Has my rose plant got a disease and how can I treat it? 
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Posts

  • Hostafan1Hostafan1 Posts: 32,360
    I' cut out the stems on the left of the second photo and give it a feed.
    Devon.
  • ObelixxObelixx Vendée, Western FrancePosts: 28,045
    You need to prune out all the dead brown wood, going back to healthy green wood.  Remove all the spotted or yellow leaves and bin them along with any leaves that have fallen to the ground.  Do not compost them.   

    Give the affected plants an instant tonic of liquid tomato feed and a handful of slow release BFB or rose or tomato fertiliser then a mulch to stop fresh black spot spored getting from the soil back onto the plants.
    "We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
  • Hostafan1Hostafan1 Posts: 32,360
    snap!! :D
    Devon.
  • Juniper4Juniper4 CheshirePosts: 77
    Thank you @Obelixx @Hostafan1 I have prune all the brown woody stems back to healthy green. Now looks like I've got nothing left, given it a good prune. 
    Done what you have suggested @Obelixx feed it. Hope it will grow back healthy. I'm hoping that the only stem left will not get any worse.
  • Hostafan1Hostafan1 Posts: 32,360
    If you have any more compost, you can mulch to about the diameter of where you've watered and you can go as deep at 50 - 75mm ( or 2"-3" )
    Devon.
  • ObelixxObelixx Vendée, Western FrancePosts: 28,045
    Good job and yes, be much more generous with the compost mulch now - after a good watering - and again in autumn after some heavy rain.
    "We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
  • MarlorenaMarlorena East AngliaPosts: 6,781
    There are 2 ways I would go about that one.   First, you haven't cut out enough cane.  You have left a disease ridden cane, the one with the green leaves at the top, you can see it's diseased with all the brown canker and brown spots all down the cane, indicating black spot and powdery mildew infection within the cane.  I would prune that right off, leaving the main green cane and 3 other short ones that look to be clean, reducing the height I imagine to about 2 foot. Your rose would be denuded of foliage completely but that's ok, it would reshoot very quickly.  That is a diseased cane you have there..

    Alternatively, depends how sentimental you are, I would dig the thing up and get rid of it, it's pretty ugly, and there are better plants out there, better roses or something else.. life's too short to put up with rubbishy plants in my opinion..
  • FireFire North LondonPosts: 15,550
    I agree with M, bring them all right down. It feels brutal, but you will have a healthier plant.
  • ObelixxObelixx Vendée, Western FrancePosts: 28,045
    Me too - didn't look closely at that stem.   Be brave - it will recover.
    "We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
  • Lily PillyLily Pilly Central southern Scotland Posts: 3,845
    I have a very similar problem which only started to show after I had put a good heap of bourse manure down. I am seriously thinking some roses are dying   Think I had contaminates manure!
    Weeds are flowers, too, once you get to know them.”
    A A Milne
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