1、 Morphological characteristics

1. Stem: the stem is relatively strong, generally hairless, or a little hairy

2. Leaves: the lower stem leaves are divided in a harp shape, with a length of 18 to 25 cm and a width of about 4-8 cm. The middle and upper leaves are oval or rectangular, and the base will hold the stem

3. Flowers: usually bloom from March to May. Calyx has 4 pieces, green. The petals are also 4, bright yellow and obovate

4. Fruit: the fruit period is from April to June. The fruit is 2-4 cm long and contains seeds. The seeds are black or dark reddish brown and round

2、 Curing method

1. Soil: the requirements of rape flower on soil are 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 during and after flowering. The water demand during flowering is large, so it is necessary to replenish water in time. Watering after flowering is beneficial to its fruit

3. Fertilization: for poor growing rape flowers, nitrogen fertilizer can be applied in winter. Before flowering, potassium fertilizer can be applied properly to improve the disease resistance of plants and yield. In addition, some phosphorus fertilizer can also be applied to promote flowering and early maturity

3、 Picture appreciation