Problems with Plumbago


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Hi All,

My outdoor, container-based plumbago (plumbago auriculata, cape leadwort) is finally growing well but still shows signs of problems.

I have just re-potted it in acidic soil and added 10% sand to help with drainage, as I know that's important. I think I had been over-watering so now only watering once per week. It's quite hot and dry now (I live in Madrid, USDA Zone 9a) so I wonder if I should water it more. I have two queries and I'd be very grateful for anyone's help!

Firstly, new leaves are sometimes shrivelling and turning completely brown, like in first photo. What could be causing this?

Secondly, there seems to be a fine white powder gathering on some of the leaves, like in second photo. Is this normal or could it be some kind of bacterial infection?

The third photo is of the whole plant in its container...

Once again, thanks so much for any help!
 

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I think you have the start of powdery mildew, and have included a link for you to look at. Welcome to our forums.


Make sure you give enough water to keep those roots damp at all times.
 

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