Star flower is a perennial herbaceous flower of the genus Rubiaceae. The plant height is 30 cm to 40 cm, the stem is erect, the branching force is strong, the leaves are opposite, the lanceolate shape, the tip of the leaf tip is sharp, the length is 6 cm to 8 cm, the top is umbel, the small flower is cylindrical, the color is 5 split into a five-flowered star, hence the name five-star flower.
There are dozens of clusters of five-star flowers, which are very beautiful. Native to tropical Africa or cultivated, it is a perennial grass flower with perennial roots. It is drought-tolerant, high-temperature resistant and has a long flowering period. It has pink, blush, peach, white and other flower colors. The flowering period is mainly concentrated in March-October. It is suitable for potted plants and flower arrangement. , flower beds and landscape layout.
In the seedling stage, the star flower is often used for seeding because of the small seed size. The commonly used medium for sowing is a medium rich in humus, well-drained and sterile, with a pH of 6.5-6.8 and an EC value of 0.75 ms/cm. Sowing in a tray, seeding 1 seed per hole. The hole size of the hole is 1.5-2 cm. Germination begins about 10-14 days after sowing, and the temperature is 23-26 °C. The seeds need to be germinated and cannot be covered. During germination, it is necessary to fully water the water to accelerate the dissolution of the outer layer of the powder and promote germination.
Starry flowers are bright and radiant. After germination, the seedlings receive sunlight as soon as possible, so as not to grow up and promote the rapid growth of plants.
The upper pot can be transplanted 7-9 weeks after sowing, and the diameter of the pot is preferably 10-15 cm. Appropriate fertilization should be applied before the upper basin to make the plants grow strong to reduce the impact of the upper basin on the plants. The cultivation medium uses peat soil which is sterile, slightly fertilized and well drained. PH value is 6.5-6.8, warm and sunny enough to help the growth of the star flower, during the growth period should maintain the night temperature above 17-18 ° C, daily temperature above 22-24 ° C, temperature below 10 ° C, will Flowering is not neat and delays or hinders the opening of flowers.
Starry flowers have a good sunshine environment, and the light can enhance the quality of the plants. The stronger the light, the tighter the plants. Winter cultivation should pay attention to supplement the light.
During birth, the relative humidity in the air is low, which can reduce the disease of the leaves. Star flower should not be over watered, keep the cultivation medium slightly dry, and promote flower bud differentiation and growth.
The fertilization of the star flower is often applied to the "Jade Green" 800-1000 times aqueous solution, once every 7-10 days, to promote the stretching of the leaves. After the mid-growth period, apply 15-30-15 (N:P:K) formula of "flowering essence 800-1000 times aqueous solution, every 7-10 days to promote flower bud differentiation and growth. Cut off the residual flowers, can bud and flower again, planting in East China requires greenhouse wintering.
The main pests and diseases of the flowers are gray spot, red spider, whitefly and aphids. Preventive methods include keeping the cultivation site clean, using sterile soil, cultivation media, and pots.
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