This plant needs moist soil so prepare a potting mixture that can retain moisture well. I grow my Peperomia Rubella in a loamy potting mixture that is rich in organic matter.
You can also prepare your own mix with ½ part peat moss and ½ part perlite. But make sure the mixture drains well because the potting soil should not remain wet.
Peperomia Rubella grows well outdoors in USDA hardiness zones 10 to 11. The soil pH should be ranging from 5 to 7.5.
This Peperomia species has average watering requirements. Even though this plant needs slightly moist soil, it is highly sensitive to overwatering. Overwatered Rubella plants start wilting and have scab like protrusions on the leaves.
I always water my indoor plants in the morning between 8 to 10 am; this is great because it allows the plant to dry throughout the day.
Water this plant moderately in summer using room temperature water. In winter, you can reduce watering frequency and quantity for this Peperomia.
Peperomia Rubella should be kept in indirect light for the best results. You can choose any location with moderate to high light levels for this plant.
The ideal lighting condition for indoor planting is bright, indirect light, but it can also withstand low light levels. Protect the plant from direct sunlight by diffusing the sunrays. Especially afternoon sun as it can damage the foliage, causing sunburns. Few hours of morning or evening sun are great for plant growth.
This plant is not picky about temperature; it will thrive in average household temperature throughout the year, 60 to 80 o F (15.5 to 26 degrees Celsius). The minimum temperature should not be lower than 59 oF (15 degrees Celsius).
In sub-tropical, warm areas, this plant may be grown outside as ground cover. You can keep this plant at any outdoor location like a balcony or patio as long as the temperature remains around 70 o F.