Biological characteristics of eight Immortals
The eight Immortals are native to China and Japan. Like warm, moist and semi-overcast environment.
The optimum temperature for the growth of eight Immortals is 18-28 ℃, and the winter temperature is not lower than 5 ℃. Flower bud differentiation takes 6-8 weeks under the condition of 5-7 ℃. The temperature of 20 ℃ can promote flowering, maintain 16 ℃ after anthesis, and prolong the flowering period. But the heat makes the flowers fade quickly.
The soil of the eight immortal pots should be kept moist, but it should not be watered too much, especially in the rainy season to prevent rotting roots caused by waterlogging. It is better to dry the eight Immortals indoors in winter. If it is too dry and wet, the leaves will rot easily.
The eight Immortals are short-day plants, which are treated in the dark for more than 10 hours a day and form flower buds in about 45-50 days. Usually cultivation should avoid the hot sun, and 60%-70% shading is the best.
The sandy loam with loose, fertile and well-drained soil is better. However, the flower color of Baxian flower changed greatly due to the change of soil pH. In order to deepen the blue, aluminum sulfate can be applied during bud formation. To keep pink, lime can be applied to the soil.
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Anthracnose of eight Immortals
Tianjin, Hebei, Liaoning, Henan, Guangdong, Shanghai, Jiangsu, Zhejiang, Fujian, Sichuan. [symptoms] mainly occur on the leaves. The lesions are brown dots at first and round after enlargement, with purplish brown to blue-black edges, light brown to grayish white in the center, with whorls and small black spots in whorls. Plaques vary in size, ranging from 1 mm to lO mm. [pathogen] the pathogen is fungus, Colletotrichurnhy-dr
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The commercialization of eight Immortals promotes the cultivation
After the necessary refrigeration treatment, the eight Immortals are usually transported and sold by ship from late autumn to early winter. Like dormant plants, they can be planted in 4-6-inch pots, or like bare-root plants in 4-inch pots. Newly introduced plants should stimulate root growth before final planting (about 2 weeks). The optimum temperature for Baxian flower to grow is 15.6 ℃-16.7 ℃, while keeping the air temperature slightly lower, about 15 ℃, which can promote root germination before sprouting. Keep the soil slightly dry before transplanting
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