As most of you know, I’m a certified plant geek. One of my favorite houseplants is cape primrose, also known as false African violet (Streptocarpus saxorum).
Cape primrose is in the Gesneriaceae family and is a cousin of African violets. It’s not as finicky as violets and is a perfect houseplant selection for a hanging basket or container. Native to Southern Africa, it can be found growing along rocks and cliffs. The species name, saxorum, is Latin for “of the rocks.”
Cape primrose (Streptocarpus saxorum) is a beautiful houseplant that is non-toxic for pets.
Barbara H. Smith, ©2025 HGIC, Clemson Extension
Cape Primrose Growth Habit & Appearance
Mature cape primrose plants will get 8 inches tall with a width of 12 inches. They will form branching stems that have velvety two-inch-long leaves. The tubular, five-lobed flowers are produced on wiry stems that float gracefully above the foliage. Flower colors range from purple to light blue. The plant is non-toxic to pets.
Cape primrose has velvety green leaves.
Jordan Franklin, ©2025 HGIC, Clemson Extension
The purple to light blue flowers are produced on wiry stems.
Barbara H. Smith, ©2025 HGIC, Clemson Extension
How to Care for Cape Primrose
What Kind of Soil Does Cape Primrose Prefer?
Well-drained, organic potting mix that does not contain a moisture control product, as it will stay too wet.
How Much Sunlight Does Cape Primrose Need?
Filtered bright, indirect light is best, with no direct hot sun in the afternoon. The hot sun will burn the leaves.
What is the Best Temperature Range for Cape Primrose?
Cape primrose grows best when indoor temperatures are between 60 °F and 75 °F. Avoid placing the plant where a heat or air conditioning vent blows directly on it.
How Often Should You Water Cape Primrose?
The soil should remain uniformly moist but not soggy. Overwatering can lead to root rot. For more information on proper watering practices, see HGIC 1459, Indoor Plants-Watering.
How to Fertilizer Cape Primrose
Use a balanced house plant fertilizer, such as a 10-10-10 or 20-20-20, every 4 to 6 weeks from spring until early fall. Stop fertilizing throughout late fall and winter to allow a rest period for the plant. Another option is to use a slow-release fertilizer, such as Osmocote.
Common Insects and Diseases of Cape Primrose
Cape primrose may occasionally have aphids and mealybugs. It is seldom bothered with disease issues. For more information on controlling common houseplant insects, see HGIC 2252, Common Houseplant Insects & Related Pests.
How to Propagate Cape Primrose from Cuttings
Cape primroses are easy to propagate. Take a 4- to 6-inch stem cutting and remove the lower leaves on the 1 ½ inch part of the stem that is inserted into potting soil. It will take about 6 to 12 weeks for a good root system to form.
Resources
North Carolina Extension Garden Plant Toolbox – Streptocarpus saxorum
