Burdock in the open ground cultivation, spring and fall can be sown, production to spring sowing, late March to early April sowing, early July began to harvest, warm areas can be linked to harvest to the following April. Fall cultivation can be sown in early August to early September, warm areas can be harvested in December, the north needs to be covered over winter, harvested in May of the following year. General 667 meters 2 production can reach about 2000 kg. In the northern cold areas, burdock can also be used in greenhouses or solariums for early or post-Ting cultivation.

Two, selecting the land, land and fertilization

Planting burdock should choose the terrain to the sun, drainage and irrigation is convenient, the soil layer is deep, fertile loam or clay loam soil plots. Burdock taboo crop, should be practiced 3-5 years of crop rotation, the previous crop to cereal crops or leafy vegetables are more suitable.

After the plot is selected, it should be ploughed and sown early, ploughed to a depth of 40-50 centimeters, to be fully frozen or sun-disturbed, broken up and raked, every 667 meters 2 fully rotted fertilizer or compost 2500-3000 kilograms, mixed with 30 kilograms of calcium superphosphate and 20 kilograms of potassium chloride, turned into the soil, raked flat. Do 2-3 meters wide (with ditch) raised beds, or 65-70 cm wide, 15 cm high high ridges, ready for sowing.

Three, sowing

In order to prevent disease, seed disinfection should be carried out before sowing. The method is: rinse the seeds with water, put into 1000 times methoxyethyl chloride mercury solution immersed in 1 hour, fish out and put in water and then immersed for 24 hours, take out the sowing.

The burdock can be sown in the field by direct seeding, strip sowing and spot sowing. Strip sowing according to 30 cm rows of plant spacing to open a shallow ditch (ditch depth of 3 cm) 667 m 2 seed amount of 500 grams or so: spot sowing rows of plant spacing of 30 cm x

20-25 cm, each hole under the seed of 4 to 5. After sowing mulch 2 cm, the soil is too wet, mulch can be thinner. early March sowing need 10-15 days after sowing seedlings; early April sowing, about 7 days after sowing seedlings.