Potted soil
It is advisable to use fertile sandy soil, first small pots and then large pots, and after changing pots for 2-3 times, the pots can be fixed in July; 6 parts of humus soil, 3 parts of sandy soil and cake fertilizer residue 1 part can be used to prepare mixed soil. After watering, put it in the shade and move it to the sunny place after the plant grows normally. ? [ 12]?
water
In spring, chrysanthemum seedlings are young and should be watered less; In summer, chrysanthemum seedlings grow, the weather is hot, the evaporation is large, and the water should be sufficient. You can water it once in the morning and once in the evening, and spray water on the branches and leaves of chrysanthemum and the surrounding ground with a watering can to increase the environmental humidity. Before beginning of autumn, it was necessary to control water and fertilizer properly to prevent plants from jumping and growing wildly. Before flowering in early autumn, it is necessary to increase the amount of watering and start fertilization, and the fertilizer will gradually thicken; In winter, the flower branches basically stop growing, the water consumption of plants is obviously reduced, and the evaporation is also small, so watering must be strictly controlled.
It's best to spray water slowly with a watering can, not violently. In addition to the number and frequency of watering, it depends on the season and the weather. Water less or no water in rainy days; When the temperature is high and the evaporation is large, there is more water, and vice versa. Generally, when watering flowers, you should see that the soil in the basin is dry before watering. If you don't do it, water it thoroughly. But don't let the flowerpot accumulate water, otherwise it will cause rotten roots, yellow leaves and plant death.
Fertilize soil or land
When chrysanthemum plants are planted, sufficient fertilizer should be applied in the basin. Nitrogen fertilizer can be applied once every 10 day in the future. After beginning of autumn, when the chrysanthemum buds are pregnant to the present buds, slightly thick fertilizer water can be applied once a week; When the buds are ready to be released, fertilization will be suspended after applying thick fertilizer water again. If calcium superphosphate or 0. 1% potassium dihydrogen phosphate solution can be applied to chrysanthemum at this time, the flowers will bloom more brightly. ?
Picking and thinning buds
When the chrysanthemum plant grows to a height of more than 10 cm, it begins to pick the core. Only 4-5 leaves are left at the base of the plant when coring, and all the upper leaves are removed. When 5-6 new leaves grow, remove the heart to keep 4-7 main branches, and remove the branches and buds that grow later in time. Tapping can branch plants and effectively control plant height and plant type. When the core is removed for the last time, the chrysanthemum plants should be trimmed, too many branches and branches that are too strong and too weak should be removed, and 3-5 branches should be kept. When the buds appear in September, the buds at the lower end of the plant should be picked, leaving only one bud at the top on each branch. ?
Extended data:
growing environment
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℃.
Chrysanthemum has strong adaptability, likes cold and is cold-resistant. The optimum growth temperature is 18-2 1℃, the highest is 32℃, and the lowest is 10℃. The low temperature tolerance limit of underground rhizomes 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 6.2-6.7. 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.
References:
Chrysanthemum (a perennial herb of Chrysanthemum in Compositae) _ Baidu Encyclopedia