Green cauliflower is also called broccoli and broccoli. Green cauliflower is delicious and delicate in quality and rich in nutritional value, and is very popular among consumers.

Green cauliflower likes a mild climate, and the suitable growth temperature is 15-20℃. Plants above 25℃ tend to grow leggy and can withstand short-term light frosts.

(1) Variety selection Green cauliflower varieties for spring greenhouse cultivation should be early-maturing, low-temperature tolerant, disease-resistant, and high-yield varieties, such as Zhongqing No. 1, Zhongqing No. 2, Green Ball, Green Ridge, and Yu Crown green cauliflower, etc.

(2) Sowing and raising seedlings. For spring greenhouse cultivation, seedlings are generally raised in mid-to-late January, planted in greenhouses in mid-March, and harvested in mid-May.

Seedlings can be raised in electric hotbeds or greenhouses, and 20 to 25 grams of seeds are required per acre. Before sowing, water the seedbed thoroughly. After the water seeps out, spread the seeds evenly on the seedbed, then cover it with 1 cm of soil and buckle the small shed. After the shed is closed, the ground temperature should be kept at 20-25°C, and the seedlings can usually emerge in 3 days. After emergence, cool down appropriately to prevent the seedlings from growing too long. Keep the temperature at 20°C during the day and 10°C at night. When the seedlings grow 2 true leaves, divide the seedlings into nutrient pots or seedbeds. The distance between seedlings is 8 cm × 8 cm.

After the seedlings are divided, the shed is closed for heat preservation. After 5 to 7 days, the seedlings can be ventilated to resume growth. Keep the seedbed temperature at 15 to 20°C during the day. When the seedlings grow to 5 to 7 leaves, they can be planted. The seedlings should be exercised 5 to 7 days before planting to adapt them to the environment after planting.

(3) Management of planting and post-planting. Before planting, sufficient base fertilizer should be applied. Apply 4,000 to 5,000 kilograms of decomposed organic fertilizer, 30 kilograms of superphosphate, and 100 kilograms of plant ash per acre. The ground should be plowed deeply and leveled. Make a flat border with a border width of 1 to 1.5 meters. Before planting, dig a trench 50 to 60 centimeters deep in the border. Apply urea intensively in the trench at a rate of 20 kilograms per acre. After mixing the soil and fertilizer, plant seedlings along the water in the trench. The spacing between early-maturing varieties is 40 centimeters, and the spacing between mid- and late-maturing varieties is 50 centimeters. Bury The soil should be deep.

After planting and before slowing down the seedlings, the greenhouse should be sealed, and the temperature should be increased and insulated to promote the slowing down of the seedlings, so that the greenhouse temperature should be maintained at 18-20°C. After slowing down the seedlings, pay attention to ventilation during the day so that the greenhouse temperature does not exceed 25°C. The temperature should be kept between 15 and 20°C from the formation of the curd to the harvesting period. If the temperature is too high, the surface of the curd will be rough and spread out. If the temperature is too low, the curd will grow slowly and be harvested late.

After slowing down the seedlings, add slowing water, pour 1,000 kilograms of manure dilute per acre or apply 15 kilograms of ammonium sulfate, and then carry out cultivating and squatting to promote root growth and make the plants strong. When the flower bulbs begin to form, apply both fertilizer and water. Apply 2,000 kilograms of human excrement, or 20 kilograms of ammonium sulfate, and 100 kilograms of plant ash per acre. After that, water once every day or so to keep the soil moist. Ventilation and moisture removal should be strengthened after each watering.

Boron deficiency in green cauliflower will cause yellowing of the leaf bulb surface and cracks at the base. Manganese deficiency will cause yellowing of the leaves and transparent leaf veins. Foliar spraying fertilizer can be used to supplement trace elements such as boron and manganese.

(4) Harvest at the right time. The harvesting period of green cauliflower is very short, so it should be harvested in time. Once the flower buds open (turn yellow), they lose their commercial value. When the flower bulbs are mature and the buds begin to feel loose to the touch, or the flower buds on the edges of the bulbs are slightly loose, it is the right time for harvesting.

Green cauliflower, unlike cauliflower (cauliflower), can be harvested multiple times. After the main stem curds are harvested, apply fertilizer once more to promote the growth of side branch curds. Generally, you can choose to leave 4 to 5 side curds and harvest them 2 to 3 times.