The morphology of rape flower is characterized by a straight clumped plant, cylindrical stems, stem-borne leaves, usually alternate, flowers of both sexes, and 4 petals arranged in a cross.

1, stem: the stem is relatively thick, generally glabrous, or a little hairy. 2, leaves: the lower stem leaves are lycopodium divisions, between 18 and 25 centimeters in length, and about 4-8 centimeters in width. The middle and upper leaves are ovate-elliptic, or oblong, and will clasp the stem at the base.3. Flowers: usually bloom in March-May. The calyx has 4 pieces and is green in color. The petals are also 4-part, bright yellow, and obovate.4. Fruit: Fruiting occurs in April-June. The fruit is 2-4 centimeters long and contains seeds, which are black or dark reddish-brown and rounded. Second, maintenance methods 1, soil: canola flowers on the soil requirements are not strict, as long as it is not too poor can grow healthily, generally with loose fertile garden soil culture can be. 2, watering: canola flowers watering to be more, especially in the flowering period and after flowering. Flowering period requires a lot of water, to timely replenishment of water. After flowering, watering is good for its results. 3, fertilization: for poor growth of rapeseed, winter can apply some nitrogen fertilizer. Before flowering, you can properly chase potash fertilizer to improve the plant's disease resistance, but also to improve the yield. In addition to this, you can also apply some phosphorus fertilizer to promote flowering and early maturity.