CURLING LEAVES:
Curling leaves are usually an indication that your plant is drying out too much, or that the leaves are getting too much direct sunlight.
DROOPING LEAVES:
Drooping leaves can indicate that your plant is thirsty and needs some water. Usually this is quickly fixed with a good watering.
YELLOW LEAVES:
The top cause of yellowing leaves on a watermelon peperomia is overwatering. Ensure that you are allowing the soil to dry slightly between watering and that you have proper drainage to avoid this. Pests can also result in yellowing leaves.
BROWN LEAVES:
There are several reasons that your peperomia’s leaves may be turning brown including new environmental stress or changes, pest damage, lack of humidity, overwatering (if they are brown and mushy). Establish what reason your plant has brown leaves then you can follow course to remedy that.