Kalanchoe with brown curled leaf tips
A basic grocery store bright pink Kalanchoe has done well since April. After it's first bloom I cut the plants (3 in a pot) back fairly hard, gave it some miracle grow and it bloomed again just as nicely.
However, all the big leaves have gotten brown edges, then curl and I pull them off.
What is causing this?
It is indoors and gets lots of sun. Enough sun to grow geraniums, amaryllis, etc.
Thank you for your time.