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dark browning edges shrubs

i recently planted a young rhodedrum white flower but after a bright start in 2 weeks the edges of the leaves turned dark brown. two months on its growing really well bu the brown is still there with no sign of disappearing. It cant be lack of water and i did put some granule feed around the base. Also the exat same thing happened to my azealia another very yound plant which is not going to ecover from the dark brown edges. 
However it has not attacked the young hydranger or any of the flowers and i am beginnin gto think it is definitely the soil but i dont know if its acid alkli or what but i can say when i planted them they were dug in ot years old grass lawn cut by the council which i have now taken on so I am hoping there is someone can save these bveautiful shrubs.
Norman Gateshead 


  • LoxleyLoxley Posts: 5,399
    Often when you move a plant from it's nice sheltered spot at the nursery surrounded by other plants (or in a shade tunnel) into the final position out in the open, the new conditions the plant finds itself in causes some or all of the leaves to curl, brown at the edges, or go yellow. That would be my first thought. If the soil is too limey that will show up in due course with mottled yellow leaves.
  • Lizzie27Lizzie27 Posts: 11,622
    edited July 2020
    Hello Norman,  That's a shame that's happened but I don't think the plants will be harmed in the long run. Are all the leaves affected or just the bottom ones and are they in shade or full sunshine?  Most plants look a bit sad and struggle until the roots get established and need more water than you might think. I wouldn't feed them any more but give them two full watering cans of water each slowly twice a week over the next month (unless it rains quite heavily) and see if that perks them up. It's been such a funny weather pattern this year that lots of plants are suffering - they don't know whether its summer or winter!

    Good luck, I hope all your plants survive. 
    North East Somerset - Clay soil over limestone
  • LynLyn Posts: 22,852
    The brown leaves on Rhododendron won’t recover, once brown they stay brown, as you said it’s growing well now, I would just pick off the brown leaves they’ll probably fall off on their own soon.
    If the Hydrangea is happy, then the other one should be, both hardy plants. 
    Dont feed a sick plant, wait until it’s got a nice lot of fresh growth then and  pile on some home made compost and make sure they both well watered in the hot weather. 
    Gardening on the wild, windy west side of Dartmoor. 

  • TheGreenManTheGreenMan Posts: 1,957
    Are they in pots, Norman? I had the same thing last spring with the brown leaves (seemed to be growing ok) and I thought I'd lift it out of the pot to see what the roots looked like etc. I found about ten vine weevil grubs. Less likely if they're in the ground though. 
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