The seeds can be obtained by picking the fruits in September to October every year, drying the fruits, rubbing them to pieces and removing sundries. Before sowing, the seeds should be soaked in cold water for 2-3 hours and wrapped with wet cloth.
To sow in windless weather, you can use the way of bed surface sowing or row sowing. The soil covering should not be too thick after sowing. Keep the bed surface wet within 30 days, and seedlings can emerge in about 20 days.
During the growth of the seedlings of broccoli, weeds should be pulled out frequently to control insects. The growth period of broccoli is longer by sowing method, which is generally used for mass propagation.
Cuttage is a common method of propagation of broccoli.
In general, the cuttage of broccoli is from June to July in summer. Select the thick branches and cut them into about 15cm long inserted Cymbidium. Only keep the upper 2-3 leaves. Prepare a sand bed, or a seedbed of peat trees. After insertion, shade should be built, and heat preservation and moisture preservation should be paid attention to. Generally, rooting can take place more than 20 days after insertion. Hardwood cutting can also be carried out in March of spring, with high survival rate. Cuttings usually bloom in 2-3 years.
The method of layering is also a simple and easy method of reproduction.
The branches of broccoli are creeping. Select the robust branches of broccoli, remove the skin, press them into the soil in the growing season, and wait for their rooting. After rooting, in the spring of the second year, separate the branch with root and mother plant, and then replant.
The propagation of broccoli can be carried out in early spring and autumn and winter. Generally, it is carried out in combination with transplanting when the plants grow again in spring.
When broccoli is propagated by plants, the whole plant shall be dug out, several plants shall be taken as a cluster, divided into several clusters and planted separately.
