Primroses (Auriculas) have an unjustly deserved reputation for being fussy and difficult to grow indoors as potted plants. Give primroses the following growing conditions indoors and they will reward you with spring and summer blooms for many years.
Soil Requirements for Primrose
Primroses need fast draining soil as they will not tolerate ‘wet feet’, but require moist soil at all times. Fill the planting pot with fast draining soil and after the primrose is planted, top the planting soil with a layer of compost to help keep the soil moist.
Fertilize and Deadhead Primrose
Primroses need to be fed twice per year, once in the early spring (March) followed by another feeding about mid-July. Use a balanced fertilizer, such as fish emulsion, to feed primroses. To encourage primroses to re-bloom, pinch off the spent flowers.
Light and Temperature for Primrose
Potted primroses love to be in the shade with a nearby sunlight source that provides indirect light. During the cooler winter months, primroses like to be moved a little closer to the light source, but still not in direct sunlight.
Primroses prefer cool temperatures, below 80 degrees is a must for healthy, happy primroses. If a prized primrose becomes overly heated, place in a cool, shady location for a few days it will usually will recover. Primroses can be over-wintered indoors, then placed outdoors in the spring (in their pots), just remember to place the pots of primrose in a cool, shady outdoor location.
Spider mites enjoy feasting on primroses and indoor primroses are not untouchable by spider mites. Check potted primrose regularly for pest infestation and treat with insecticide at first signs of pest infestation.
How To Propagate Primrose
Primroses are easy to propagate and new plants can be created each fall. Primroses need to be re-potted annually, fall being the best time for the re-potting procedure. While repotting mature primroses, remove off-shoots that have developed at the base of the primrose and plant them directly into individual pots containing fast draining soil.
Primrose Dish Garden
Primroses grow very well when planted in a dish garden. Use different bloom colors of primrose to plant in a dish garden, then cover the gaps in the soil between primroses with moss and small rocks. The moss will help retain soil moisture while looking aesthetically pleasing as part of the dish garden.