In plant taxonomy, it is a perennial herb of Compositae and Chrysanthemum. According to the cultivation form, it can be divided into many cultivation types, such as multi-headed chrysanthemum, single-headed chrysanthemum, big chrysanthemum, cliff chrysanthemum, artistic chrysanthemum, desk chrysanthemum and so on. According to the appearance of petals, it can be divided into garden hug, retreat hug, reverse hug, disorderly hug, happy hug, flying hug and other cultivation types. Different types of chrysanthemums are named after different varieties.
Chrysanthemum is the dry flower head of Compositae. Location: Zhejiang, Anhui, Henan and other places. September-165438+1October flowers are picked in batches, dried in the shade or baked, or smoked and evaporated. Eat raw. Medicinal materials are divided into "Boju", "Chuju", "Gongju" and "Hangju" according to origin and processing methods. Because of the different colors of flowers, there are Huang Juhua and white chrysanthemums.
Chrysanthemum is a short-day plant, which can blossom early under short-day conditions. Love sunshine, avoid shade, be more drought-tolerant and be afraid of waterlogging. I like the warm and humid climate, but I can also resist the cold. Roots can overwinter underground in severe winter. Flowers can withstand slight frost, but higher temperature is needed for seedling growth and bud formation. The optimum growth temperature is about 20℃, the highest growth temperature is 32℃, and the lowest is 10℃. The low temperature tolerance limit of underground rhizome is generally-10℃. The lowest night temperature at flowering stage is 17℃, and it can be reduced to 15- 13℃ at flowering stage (middle and late stage). I like plenty of sunshine, but I also tolerate shade a little. More resistant to dry, the most taboo waterlogging. I like sandy loam, which is located in Gao Qian, with deep soil layer, rich humus, loose fertility and good drainage. It can grow in slightly acidic to neutral soil, and the pH value is PH6.2-6.7. Avoid continuous cropping. Autumn chrysanthemum is a long-night plant, and its stems and leaves grow nutritionally under the long sunshine of 14.5 hours every day. Darkness of 12 hours per day and night temperature of 100 degrees Celsius are suitable for flower bud development. But different varieties have different reactions to sunlight.