Maintenance and management of eight immortal flowers

Fertilization: eight immortal flowers like fertilizer, generally every half a month to pursue organic fertilizer. There is more nitrogen fertilizer in the early growth stage, and more phosphorus and potassium fertilizer in the flower bud differentiation and bud formation stage. 0.1% to 0.2% potassium dihydrogen phosphate can also be sprayed on the leaves for 2 to 3 times, and the fertilization can be stopped after the flower buds are transparent.

Watering: the transpiration of the leaves of the eight Immortals is very large, so it must be watered in time, even if the lack of water for a short time wilts, it can also cause the leaf margin to dry up and the flowers to die. Especially in summer, it is necessary to shade and cool down to reduce transpiration and maintain more than 60% air humidity. In addition, the flower color of Baxian flower is usually blue in acidic environment and red in alkaline environment, which is affected by soil pH value. Therefore, the pH value of the water should be determined according to the desired color.

Temperature: the eight Immortals can not bear high temperature, and the temperature should be between 15 ℃ and 25 ℃. The high temperature will dilute the color of the dwarf flowers and reduce the quality. After the flower bud is colored, the temperature is kept at 10 ℃ to 12 ℃ to improve the flower color and keep it fresh.

Illumination: the eight Immortals are shady, and direct sunlight will cause sunburn, so shade is needed. Usually 60% shading is needed during the growing period, and the inflorescence should also be shaded properly after the color is transparent, so as not to fade and lose its luster.

Pruning: the eight Immortals have a strong sprouting power and will sprout a lot of nutrient branches at the base of the plant. In order to reduce nutrition loss, it should be erased in time. If the old branch needs to be replaced, a robust vegetative branch can be selected as the reserve branch. Cut it short in time after anthesis and retain 2 or 3 strong buds to promote new shoots.

In order to make the eight Immortals bloom during the Spring Festival, robust plants of 3 to 5 years old can be selected. After 14 days of low temperature treatment of 2 ℃ to 4 ℃, they are moved into the greenhouse for heating, kept for 10 ℃ to 20 ℃, and can bloom in 50 to 60 days. Pay attention to regular ventilation, maintain good light conditions and high air humidity, and apply organic liquid fertilizer once a month until flowering.

Baxian flower has few insect pests, mostly aphids, leaf mites and so on, which can be controlled by spraying internal absorbent agents while ensuring good ventilation. Most of the common diseases are leaf diseases, such as white rot, gray mold, leaf spot and so on, so it is necessary to spray insecticides regularly to prevent the disease, and the diseased leaves can be removed and burned.