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Should I be worried with these black canes?

Good morning everyone,

I have just noticed that a cane used to grow my Claire Austin rose has a black powder/residue on it. I noticed that some of the leaves on the rose have blackspot and wondered if it was anything to do with that. Is this anything to be worried about and do I need to replace the cane?

Many thanks,



  • PlantmindedPlantminded WirralPosts: 1,011
    That looks like sooty mould to me.  I'd remove the cane, treat your rose and then replace the cane with a new one.  This guide from the RHS will help you decide on which treatment to use: Sooty moulds / RHS Gardening

  • FairygirlFairygirl west central ScotlandPosts: 46,168
    I know nothing about roses, but if you have it tied in to other supports [and it looks as if you do] you probably don't need any canes anyway.  :)
    I'm sure someone else can confirm that if it's the case. 
    It's a place where beautiful isn't enough of a word....

  • Pete.8Pete.8 Billericay, EssexPosts: 8,516
    I agree to get rid of the cane.
    It appears you have training wires, so use them instead, but don't tie the stems in too tightly - they expand as they grow and you may end up strangling them.
    I have about 15 roses, most of them get black spot. I don't treat it.
    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
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