I bought a Curio Mount Everest from Lidl 1 week back. Since I am in northern Germany, it does not get much sunlight or sun in winter. So, I am watering it only when it is totally dry and I am also keeping it under a growth lamp for 12 hours.
Still, after 2 weeks I am seeing that lower leaves are drying out and when I touch the leaves, it looks like some white powdery substance comes out and also the leaf color changes to green.
Any suggestions on how can I take care of it?
Here are the images of the plant: