More than 1,000 types of Peperomias exist, but not all are cultivated and grown for distribution to the public. Plant collectors may have an unusual variety, as may arboretums or indoor displays at botanical gardens. Several types of Peperomia houseplants can brighten your indoor displays.Grow Peperomia plants in a light houseplant mixture with perlite or coarse gravel included to allow roots to receive air circulation necessary for the health and development of your plant. If your peperomia plants are wilting, in spite of regular watering, the plant is likely not getting enough oxygen to the roots. Water Peperomia houseplants sparingly and allow the soil to dry as deep as 5 inches between waterings.