Peperomia watermelon peperomia sanderiiwith leaves that are reminiscent of a ripe watermelon, the watermelon peperomia is an easy to care for plant. light: bright, indirect. In its natural habitat it lives under the canopy of larger plants, shielding it from harsh light. water: allow the plant to dry out about half way before watering, and then deeply water allowing the soil to become soaked again. if in doubt, wait a day, this plant would rather be a little dry than too wet.