It should be possible in a greenhouse
1. Small file of green vegetables
Alias: Chinese cabbage, rapeseed, small rapeseed
The seeds can be pressed for oil Brassica oleifera, also known as rapeseed, has two varieties: brassica and nori. Its leaves have pink frost, and the basal leaves are pinnately cracked, which is different from Chinese cabbage.
Planting season/August-October (can be planted every year, but autumn and winter are better. It is better to plant indoors in northern winter)
2. Green vegetables-seedlings
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When the temperature is high, the direct seeding method is suitable. When the temperature is low, it can be transplanted after sowing.
1. First, water the potting soil thoroughly. Mix the seeds with fine soil and then spread them on the soil surface. Cover the soil slightly to cover the seeds. It should not be too thick. You can spray the topsoil to wet it. Keep it moist. It usually takes about 3-4 days to germinate, and it takes about 1 week when the temperature is low.
You can also use the on-demand method, with 2-3 seeds per hole, with a spacing of about 3-5 cm. The spacing can be smaller when the temperature is high, and slightly wider when the temperature is low.
2. The soil needs to be kept moist during the seedling stage. Water once in the morning and once in the evening when the temperature is high. Spray a thin layer of decomposed organic fertilizer once with watering after 2 weeks of germination.
3. It can be transplanted and planted when it has 4-5 true leaves. The distance between plants depends on the size of the variety, usually about 15-20 cm. After planting, water it thoroughly and provide some shade. After it survives, manage it normally. If transplantation is not required, you need to start thinning out the larger seedlings. The principle of thinning is to make the seedlings more evenly distributed. You can choose to row multiple times until the spacing is appropriate. Apply decomposed organic fertilizer once after each thinning.
3. Green vegetables - daily management
1. There are many diseases and insect pests in summer. Pay attention to clearing old and diseased leaves in time. If there are insect pests, they should be eliminated as soon as possible. Appropriate supplementation of phosphorus and potassium fertilizers is also beneficial. Improve plant disease resistance.
2. It is not drought-tolerant and needs more water during the growth period. Pay attention to watering in time, but be careful not to accumulate water to avoid root rot or disease.
3. A lot of fertilizer is needed, mainly nitrogen fertilizer. The concentration of fertilizer should be small in the early stage, and the concentration can be increased appropriately in the later stage. Generally, mature organic fertilizer is sprayed once a week, and fertilization should be stopped 2 weeks before harvesting. .
4. Appropriate crop rotation can reduce pests and diseases. For example, you can first plant melons, eggplants, beans, root vegetables and other vegetables in spring and summer, then plant Chinese cabbage, and then plant cabbage and cabbage vegetables. You can also use onions, garlic, celery, spinach, etc. to sow mixed seeds.
4. Green vegetables - harvesting
You can pick the seedlings for consumption at any time when there are more than 4-5 true leaves. The general growth period does not exceed 2 months to avoid affecting the taste.
5. Green vegetables - nutritional value
Vegetables rich in minerals and vitamins, rich in calcium, phosphorus, niacin, vitamin B1, vitamin B6, pantothenic acid, selenium, etc. It can enhance the body's immunity, prevent the formation of cholesterol and delay aging.