What seasons are suitable for planting rape in a year?

Hello, we have a local agricultural proverb: "Nine vegetables and ten wheat". Generally, rape is planted in September of the lunar calendar, and it is planted early. When rapeseed is picked before the Spring Festival, it will be affected by cold wave, freezing rain, snowfall and frost weather, resulting in reduced production. If it is planted too late, the rape will not grow, and it will stop growing when it is cold in the "March 9" and will also reduce production. Therefore, our local direct seeding rape began to be planted in mid-September of the lunar calendar, and transplanting began from the end of August to the beginning of September of the lunar calendar.

Transplanting rape, direct seeding rape, intertillage weeding in winter, and spraying 25% triadimefon emulsion again to control pests and diseases. Before spring, apply urea 15 kg per mu after rain. Promote bolting of rape after spring. Generally, nitrogen fertilizer is not applied at the bolting stage to prevent rape from "falling in love with green". At the bolting stage, it can be sprayed with chelating boron fertilizer or foliar fertilizer containing amino acids.