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Mildew on indoor sage plant

jess493jess493 Posts: 3
in Problem solving
Bought this sage plant a couple of months ago. It has been mainly sat by kitchen window, which has been mostly open. Haven't re-potted it. Try not to overwater - about once a week, but it never seems to dry out. 

About two weeks ago I noticed some of the leaves had a white powdery looking mildew on the surface. I removed these leaves and left it. Since then the mildew has continued to spread, and I continued to remove contaminated leaves. Went away for a few days and got back today to the attached picture. 

Is it salvageable? Not sure what I'm doing wrong, possibly overwatering? If it makes a difference the kitchen only gets proper sunlight late afternoon/early evening. Thanks 

Posts

  • DovefromaboveDovefromabove Posts: 88,147
    It’s a Mediterranean plant. It needs to be outside in a sunny spot with free draining gritty soil ... preferably the ground but it’ll cope with a pot as long as it’s in free draining compost that doesn’t hold on to the water.  Water it once when planting as and it won’t need watering again until there’s a prolonged dry spell next summer.  

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





  • JennyJJennyJ Posts: 10,576
    I agree with @Dovefromabove. Sage likes full sun and is hardy in most of the UK, so it would be happier outside if you have space (you don't say whether you have a garden). Otherwise try a sunnier windowsill in another room, and let the compost get quite dry between waterings.

    And welcome to the forum :).
    Doncaster, South Yorkshire. Soil type: sandy, well-drained
  • jess493jess493 Posts: 3
    Thank you for the helpful advice and the welcome. I am a complete novice with all things plants.

    I don’t have a garden but do have a roof terrace which gets all angles so will move it up there. Assuming I should pick off all the affected leaves (which is most of them 😢)? 


  • DovefromaboveDovefromabove Posts: 88,147
    I wouldn’t worry about picking the leaves off ... winter is coming and the plant may well drop them all. Just pick them up and bin them when they fall. While they’re still on the plant they can still do a little bit of work in the sunshine, photosynthesing and creating energy for the plant, even with a bit of mildew. 

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





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