Hardy only in USDA Zones 10 and 11, the cold-sensitive peperomia won't tolerate even the lightest frost. While peperomia has thousands of relatives, the most common varieties enjoyed as houseplants share basically identical cultivation requirements. The peperomia is an attractive and relatively inexpensive plant, commonly available at garden, department, home improvement and grocery stores.
Create a planting medium by combining two parts all-purpose potting mix, three parts Perlite, two parts compost or leaf mold and one part aquarium charcoal. Add bone meal according to the packaging instructions. Crush up two eggshells to add some lime.
Plant your peperomia in a well-draining clay pot slightly larger than its current container.
Pour some gravel into the pot's drainage dish. Cover the gravel about halfway with water and set the potted peperomia on it. Don't allow the pot to come into contact with the water.
Place your peperomia in the brightest room of your home, but out of direct sunlight. These plants prefer 75 to 85 degrees F during the day and 62 to 65 degree nighttime temperatures.
Soak the soil thoroughly, but not so much that it's soggy. Don't water the peperomia again until the surface dries out to the point of being just barely moist to the touch. These plants are semi-succulents, meaning that their leaves and stems reserve water naturally. This makes them more susceptible than many other plants to the rotting effects of overwatering.
Feed your peperomia once in April and once in July. Use an all-purpose water-soluble fertilizer diluted to half-strength. Follow the manufacturer's recommendations carefully.
Reduce watering during the winter months. If the soil surface feels at all moist during this time, do not water it.