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Hydrangea Scale protection

I had one of my Hydrangea covered in hydrangea scale, which I found out what it was on here.

I am now wondering if there is anything I can do to protect my other hydrangeas from getting it, I keep checking them


  • BobTheGardenerBobTheGardener Posts: 11,391

    Only a systemic insecticide would prevent them but that would also poison any visiting bees so not something I would do or recommend.  Infestations only occur when adult scale is already present but goes unnoticed.  When their eggs hatch young scale insect nymphs run all over the plant before settling.  If you stay vigilent and rub-off any adult scales that you see it is unlikely you will get another infestation.

    A trowel in the hand is worth a thousand lost under a bush.
  • Thanks will keep checking other plants
  • What causes this and is there a prevention rather than a cure??
  • BobTheGardenerBobTheGardener Posts: 11,391

    It's a sap-sucking insect Lyndsay, but they don't move once they have chosen a place to suck the sap.  The young insects are highly mobile though and may arrive on birds feathers or cross from other hydrangea which are close by, especially if the leaves are touching.

    A trowel in the hand is worth a thousand lost under a bush.
  • Thanks for the info just found on my biggest and oldest hydrangea and have cut the stems out that were covered and will just keep checking.!
  • Having to remove a very lovely hydrangea as is covered in hydrangea scale can i plant a new one in the same place or is the soil affected also?????

  • BobTheGardenerBobTheGardener Posts: 11,391

    Scale insects don't infect the soil but I would mix some blood, fish and bone into the soil according to the directions on the pack to feed the soil before planting another one.

    A trowel in the hand is worth a thousand lost under a bush.
  • Hi thanks for the advise will do so.

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