Chrysanthemum alias: Juhua, Qiuju, rijing, Jiuhua, Huanghua, imperial flower, Jiehua, Yiju, chamomile.
Common varieties of chrysanthemum: according to the flowering period, there are early September chrysanthemum, autumn chrysanthemum that opens from October to November, and late chrysanthemum that opens from December to January; according to the flower diameter, it can be divided into large chrysanthemum (diameter of more than 10 cm), medium chrysanthemum (diameter of 6-10 cm) no, small chrysanthemum (flower diameter less than 6 cm), etc.
The propagation method of chrysanthemum: 1. Cutting method: bud cutting, generally in late autumn, cutting the foot bud of the plant as cuttings, and transplanting and planting in the next year; softwood cutting, generally in April to may, cutting 8-10 cm of tender branches as cuttings, this method is the most widely used; leaf bud cutting, from the branch to cut a piece with axillary bud for cutting, this method is less used, generally only used for some rare It is very important to breed. 2. Division method: before and after the Qingming Festival, the whole plant is dug out and divided according to the natural morphology of the root system, and it is respectively implanted into the basin. 3. Grafting method: it is usually carried out in sunny days from May to June. Artemisia annua or Artemisia annua can be used as rootstock for grafting.
Chrysanthemum light and temperature: like cool, very cold resistant. The optimum growth temperature is 18 ~ 21 ℃.
Chrysanthemum medium: suitable for growing in loam with thick soil layer, fertile and loose soil and good drainage.
Watering of chrysanthemum: the best way to water chrysanthemum is to store rainwater, and the water temperature is close to the soil temperature. It is suitable to water at noon in winter and in the morning or evening in summer.
Fertilization of chrysanthemum: like fertilizer, fertilization should be based on phosphorus and potassium. 0.2% potassium dihydrogen phosphate solution was sprayed from the beginning of autumn to before flowering.
Chrysanthemum pruning: keep only the plump and healthy buds on the top, and cut off the side ones.
Prevention and control of diseases and insect pests of chrysanthemum: the most serious disease is leaf spot, spray 1000 times of 50% tobujin during the growth period; after the diseased leaves are found, spray 500 times of 65% mancozeb WP once every 7-10 days, 3-4 times continuously, which can inhibit the disease; if the disease is serious, the diseased branches and leaves should be removed and destroyed in time. Aphids and red spiders can be sprayed with dimethoate emulsion.
Shopping tips: try to choose tall and green leaves, flowers are not too crowded plants.
