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Leylandii Trees

Im hoping that you very knowledgable and helpful folk can help me.  I have some conifers on the boundary of my property which are turning brown. They have recently been cut back very harshly by a third party (to the trunk, all branches removed on one side).  The depth of the trees has been reduced by about two thirds of their original size . Would such a harsh ‘prune’ cause the trees to turn brown? Thank you in advance. 


  • nutcutletnutcutlet Posts: 27,295
    If the green part is cut off, exposing the brown underneath, it stays like that. But I wouldn't expect any remaining green parts to turn brown

    In the sticks near Peterborough
  • Thank you ! Do you know why they would have turned brown? There are no signs of disease....
  • nutcutletnutcutlet Posts: 27,295
    Sorry, I have no idea, I'm not very 'up' in conifer issues
    Have you got a photo? It might help.

    In the sticks near Peterborough
  • DovefromaboveDovefromabove Posts: 86,037
    There's a large conifer  (a beautiful Cedrus deodara aurea) a few houses away from here that is turning brown over the past few weeks ... looks to me as if it's suffering from drought.  Don't think it's prospects are good.  :(

    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.

  • LynLyn Posts: 22,852
    They don’t live for very long, how old are the trees , we’ve  just had to cut all these down been there for 30 years, on the moors here they fell them every 30 years. You can see the one that fell down, fortunately it didn’t reach the property. 
    So maybe yours are just coming to the end of their life. 

    Gardening on the wild, windy west side of Dartmoor. 

  • FairygirlFairygirl Posts: 53,933
    They do get brown 'inside' but that looks like a water shortage issue there.

    Is that a nice dissectum Acer next to it? I'd be keeping that and getting rid of the leylandiis if at all possible. The Acer will suffer from the competition - especially for water.  :)
    It's a place where beautiful isn't enough of a word....

    I live in west central Scotland - not where that photo is...
  • LynLyn Posts: 22,852
    Those are huge trees, you don’t normally have to water old trees like that. You will need a professional tree feller to cut it down. 
    Gardening on the wild, windy west side of Dartmoor. 

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