How to care for primroses

Lighting conditions

Primroses prefer a warm and sunny environment, but are afraid of strong light. Therefore, during the summer seedling stage, the plants should be placed in a cool, ventilated place with sufficient scattered light. Starting from September, the sunlight will not be so strong, so the potted plants can be exposed to more scattered light. Starting from October, all the plants can be placed under the light so that they can receive more light in late autumn when the temperature drops, which will promote their growth and differentiation of flower buds.

Growth temperature

Primroses prefer warm and relatively cold-resistant climates. The suitable temperature for their growth and development is about 15℃. The indoor temperature should be kept at around 10℃ in winter. The two extremes of the growth temperature are 0℃ and 30℃. Overheating or overcooling will cause the plant to wither and prevent it from developing normally.

Moisture conditions

Primroses prefer a humid climate environment, but do not water them too much to prevent root rot caused by excessive moisture in the potting soil. Improper watering in summer will cause the plant to stop growing and the leaves to fall and turn yellow. In summer, you can water the plants once in the morning and once in the evening. The weather is dry and hot at noon, so you need to sprinkle water around the plants to maintain the humidity of the potting soil and the surrounding environment, lower the temperature, and create a cool and humid growing environment. Gradually reduce watering in autumn. After winter, as the buds begin to bloom, you should water appropriately, but do not water too much.

How to fertilize

Apply nitrogen, phosphorus and potassium compound fertilizer once after about 8-10 days of seedling growth. After autumn, the climate gradually becomes cooler, and primroses also enter their vigorous growth season. At this time, the fertilizer and water of the flowers should be increased; in the later stage of primrose growth, phosphorus fertilizer should be appropriately increased, and 0.3% potassium dihydrogen phosphate solution should be sprayed on the leaves every half a month, which can promote bud formation and flowering.

Pest control

Primrose seedlings are weak and easily attacked by pests and diseases, especially damping-off disease. Prevention and control should be stopped immediately. You can spray 800 times the concentration of dichlorodiphenyltrichloroethane on the soil surface for prevention and control.

How to prune

During the flowering period, remove some of the flower branches of the plants that have just produced seeds, and apply 1-2 times of compound phosphorus and potassium fertilizer to make the seeds grow full. When the flowers fade, they should be cut off in time and a thin layer of fertilizer should be applied 1-2 times. This will help promote and grow the flower branches and enable the plant to continue blooming.