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Mouldy retaining wall

At the bottom of my rockery is a rendered 4ft retaining breeze block wall. It has plenty of drainage at the bottom and some half way up but the whole wall constantly turns green and cracks and peels. We've painted it in everything from cheap own brand masonary to the expensive dulux weather shield premium. What can I do on a minimal budget to cover the wall or fix it!! I would rather not screw screening onto it... 


  • nutcutletnutcutlet Posts: 27,142

    let it be green, It will be damp, you can't alter that.

    Grow something that hangs down over it 

    In the sticks near Peterborough
  • If it's breeze block, could you possibly create pockets within it, to plant directly into? Turn it into a living green wall and go with the flow image

  • ButtercupdaysButtercupdays Posts: 4,402

    Paint it with yogurt to encourage the algae? Or paint it slime green so the algae shows less?

    My drystone walls in the sun get lichened, but stay fairly clean and dry. Those in the shade go completely green and grow moss all over, then the ferns move in.!

    My rockery wall gets a fair bit of sun at one end and is shaded at the other. In the sun I have Helianthemums and Stachys lanata (Lamb's ear) growing over the edge together with a Potentilla fruticosa planted right on the edge that reaches down to the ground. The shaded bit has Vinca (Periwinkle), perennial candytuft (Iberis), and Alchemilla mollis. I would have aubrieta in the sunny bit, but it doesn't like it here!

  • Hi MillyMilo, you can buy a fungicidal wash from Wickes, it's£8.49 for 4L.

  • ButtercupdaysButtercupdays Posts: 4,402

    Green is algae, not fungus!

  • nutcutletnutcutlet Posts: 27,142

    you can always find something to kill something. Not a road I'd recommend

    In the sticks near Peterborough
  • pansyfacepansyface Posts: 21,877


    Apophthegm -  a big word for a small thought.
    If you live in Derbyshire, as I do.
  • nutcutletnutcutlet Posts: 27,142

    image yes Pansyface

    In the sticks near Peterborough
  • FairygirlFairygirl Posts: 52,005

    One part, in particular, of my north west facing, narrow border along a fence has created it's own little green colony, with moss on the adjacent path blending in with the other planting including a little saxifrage which loves it there. 


    And moss is so sculptural in it's own right 


    What's not to like?  image

    Are we persuading you MillyMilo?  image

    It's a place where beautiful isn't enough of a word....

    I live in west central Scotland - not where that photo is...
  • Hi MillyMilo, I use Wickes fungal wash on my fence and  the house wall. It kills LICHEN,ALGAE and MOULD as it says on the label.If you use it ,apply it on a dry takes a few days to work.

    If it looks anything like Fairygirls , I'd stick some ferns in the gaps and make it a feature.image


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