Water the plant deeply when the top of the soil feels dry. Let the pot drain completely and never allow the plant to stand in water. In winter, water sparingly and allow more time between each watering so the soil has time to dry a bit more than usual.
Your peperomia plant will thrive when it's fertilized regularly with a 20-20-20 fertilizer containing equal parts of nitrogen, potassium and iron. Dilute your fertilizer to half strength and apply it every two weeks during the spring and summer. Reduce the rate to once a month in the fall and winter.
Needs medium light, will grow best in bright indirect sunlight. Keep away from direct sunlight. Well suited to an indoor location but also survive outdoors under a patio.
Peperomias prefer warmer temperatures but will easily tolerate cooler climates of southern states. Temperatures above 10oC are preferable, they will thrive between 18oC and 25oC.
You will not need to repot or pot up a size very often as this plant has a small root system. It's a good idea to change the soil or at least the top soil annually and if a young plant has out grown its current pot you may repot a size up during spring.