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Large shrubs dying in one part of my garden

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one side officer my garden shrubbery is dying bit by bit. It started last year with a large ceanothus dying almost overnight, next was a climbing rose which covered a pergola, then another ceanothus and now a red robin is also dying.  All plants are 10-11 years old.  There is also a silver birch tree in this border which is also not looking very healthy.  There is nothing in the ground, bugs, mildew etc.  It's a dryish bed but has a watering system, regularly fed.  Neighbours haven't used any weed killer.  Any ideas?

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  • BobTheGardenerBobTheGardener Posts: 11,384

    It could be the dreaded Honey fungus or Phytophthora root rot.  Inspect the base/roots of the affected shrubs to see if you can find any signs:

    https://www.rhs.org.uk/advice/profile?pid=180

    https://www.rhs.org.uk/advice/profile?PID=542

    A trowel in the hand is worth a thousand lost under a bush.
  • Paul B3Paul B3 Posts: 3,154

    I think Bob may be right about Honey Fungus ; I used to 'do' a garden where they lost 11 specimen shrubs in one season .

    If you dig down look out for the dreaded black 'boot-lace' strands . There used to be a fungicide called Armillatox (copper based) but I think it's (yet another one) , been removed off the shelves !

    I don't know of an effective cure against this , other than dig out and burn everything .

  • Thank you, I'll have a dig tomorrow and see if there are any strands

  • Tree and shrubs taken out and hard mushrooms showing, i thought it was a buried golf ball at first, darkish brow, so assume its honey fungus.   Now trying to get someone to dig out the soil and get rid of soil etc.  Picture shows mushrooms on left, however they appear to be dying, is it honey fungus?

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  • Paul B3Paul B3 Posts: 3,154

    I honestly can't answer with certainty ; maybe you ought to start a new thread with the pictures you've posted . Hopefully someone on the forum can advise better than me !

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