1. Stem: the stem is thick, generally glabrous, or a little hairy.
2. Leaves: the lower cauline leaves are divided in the shape of zither, with a length of 18-25cm and a width of about 4-8cm. The upper and middle leaves are oval or oblong, and the base holds the stem.
3. Flowers: usually bloom from March to May. Calyx has 4 pieces, green. Petals are also 4, bright yellow, obovate
4. Fruit: the fruit period is from April to June. The fruit is 2-4cm long and contains seeds. The seeds are black or dark reddish brown and round.
1. Soil: the requirement of rape flower to soil is not strict. As long as it is not too poor, it can grow healthily. Generally, it can be cultivated with loose and fertile garden soil.
2. Watering: rape flowers should be watered more, especially at the flowering stage and after flowering. The water demand in flowering period is large, so the water should be replenished in time. Watering after flower is good for its result.
3. Fertilization: for rape flowers with poor growth, nitrogen fertilizer can be applied in winter. Before flowering, potassium fertilizer can be properly applied to improve the disease resistance and yield of plants. In addition, it can also apply some phosphate fertilizer to promote flowering and early maturity.
