Hoya Kerrii Turning Yellow
I am a newbie to gardening and have bought one of these single-leaf Hoya Kerrii plants (heart-shaped) about 8 month ago. It was doing fine until recently when it has started to turn yellow. A small brown spot has also appeared on the plant.
I have tried to water the plant only when the soil looked dry but there has been something like white mold on the soil recently. Could you please help me by giving some advice on how to save my plant?
Is it too late?
Thanks a lot in advance for your kind helps.