How many days does rapeseed bloom: The answer is about 30 days. Rapeseed flowers begin to bloom in March or April every year, and the flowering time varies from year to year. Generally, it starts to bloom three months after planting, and the flowering period is about thirty days. Due to geographical influence, in southern Shaanxi, northern Sichuan, and the Jianghuai region, canola flowers open at the end of March and the beginning of April, and last until the beginning of May. The further north you go, the later the canola flowers bloom, and in the northern province of Qinghai, they don't even bloom until July. Rapeseed flowers begin to bloom around March and April each year, and the flowering time varies from year to year. The flowering time varies from year to year. It usually starts to bloom three months after planting, and the flowering period lasts for about thirty days. Due to geographical influence, in southern Shaanxi, northern Sichuan, and the Jianghuai region, canola flowers open at the end of March and the beginning of April, and last until the beginning of May. The further north, the later the flowering time of rapeseed, the northern Qinghai Province, even until July to bloom. 1, the flowering period of rapeseed is about 30 days. 2, rapeseed belongs to the cruciferous plants, if well-maintained, rapeseed can be once a year. The general sowing time is late fall, and can be harvested in early summer of the next year. The flowering time of rapeseed is different in different regions. The flowering period of rapeseed is from January to April, but it is mainly concentrated in March-April in spring. The flowering period is about 30 days, and usually begins to wither in May.3, flowering watering: canola flowers like moisture, so maintenance needs to provide relatively enough water, especially in the flowering and post-flowering, these two stages need a lot of water, so give more water to the canola flowers, generally canola flowers bloom for a month, watering is needed for 1-2 times in this month.4, flowering fertilizers: for the poor growth of canola, the winter can be appropriate to apply nitrogen fertilizers However, you can't continue to apply nitrogen fertilizer before the flowering of rapeseed flowers. Appropriate potassium fertilizer chase is needed, which can improve the disease resistance and yield of canola. In addition, phosphorus fertilizer can also be applied to promote flowering and early maturity. 5, flowering light: canola is a long sunshine crop, it is best to have full sunshine every day, which is conducive to canola flowers bloom more, more beautiful. If canola is in a dark environment for a long time, the growth of canola will be very slow and easy to get some diseases.