Planting time of Artemisia annua L.

Chrysanthemum is also called Artemisia, Artemisia. Originated in our country. The edible part is tender stem, rich in nutrition, less fiber, excellent quality and unique flavor. It is a regulating variety of vegetables, and also an indispensable refreshing dish for fast food industry, hot pot city and buffet. Chrysanthemum not only has pleasant flavor, but also is easy to cultivate, grows fast and has short cycle. It can be used as the first and last crop cultivation and interplanting and interplanting cultivation of protected main crops.

The planting time of chrysanthemum

The whole plant of chrysanthemum has a special fragrance and has a unique repellent effect on pests. Therefore, pesticides are rarely sprayed and it is an ideal pollution-free vegetable. It belongs to semi-cold-resistant vegetables, in cold and mild, soil relative humidity maintained at 70%--80% of the environment, conducive to its growth. Under suitable temperature conditions, annual sowing can be carried out. In recent years, winter, spring and autumn protected land planting has become more and more common. After sowing, it is generally harvested 40--50 days, and the growth period is extended to 60--70 days when the temperature is low.

1, planting time is generally good for spring and autumn cultivation. Rent in the south, spring, autumn, winter three seasons can be cultivated.

2. The sowing method can be direct seeding or seedling transplanting, mainly direct seeding. The seeds will be evenly spread on the culture soil, after sowing soil cover degree to about 1 cm is appropriate, water, heat preservation moisture. 4-5 Days can emerge, in the seedlings grow to 2-3 true leaves, need to thin seedlings.

3. Planting utensils Plant chrysanthemum on balconies, rooftops, or courtyards. The cultivation containers that can be selected include flower pots, wooden pots, professional cultivation boxes, foam plastic boxes, etc. The depth of tillage layer is preferably 20 cm.

The cultivation method of chrysanthemum

1, temperature: chrysanthemum growth temperature of 17--20℃, early spring sowing weather is still relatively cold, and accompanied by late spring cold phenomenon, so after sowing need to cover plastic film or old shed film on the ridge surface, all around with soil compaction, cold insulation, until the weather turns warm, seedlings unearthed before the film opened. When the temperature exceeds 25℃, open the vent to let out air.

2. Thinning and weeding: When the seedlings grow to about 10 cm, the lobular seeds are plucked according to the plant and row spacing of 3--5 cm, and the large-leaf seeds are plucked according to the square of about 20 cm, and weeds are eradicated at the same time.

3. Watering and fertilization: After the seedlings are unearthed, they should be watered. The watering time and frequency should be flexibly controlled to keep the soil moist. 10--15 days before each harvest, apply quick-acting nitrogen fertilizer once, apply potassium nitrate 15kg and urea 8kg per mu.

Control of diseases and insect pests of chrysanthemum

The diseases and insect pests of chrysanthemum flower mainly start with agricultural prevention and control, reasonable fertilization and watering should be applied to avoid fluctuation; temperature management should not be high or low, create good ecological environment, promote healthy growth of plants, reduce diseases and insect pests harm and pesticide application, and maintain ecological balance.

The harvest method of chrysanthemum

When the seedlings grow to 18--20 cm high, the small leaves are cut once on the ground, washed with soil at the roots, and bundled into small bundles for listing. The harvest of large leaf chrysanthemum is relatively flexible, which can be harvested at one time, or it can be harvested many times by sowing once. When harvesting, 4- 5 leaves or 1- 2 lateral branches at the base of the main stem shall be left. The upper tender main branches or lateral branches shall be cut by hand or knife, tied into a market, and pinched once every 20 days or so. Water and topdressing in time after harvest to promote lateral branch germination.