Cultivation techniques of Forsythia suspensa

Cultivation Techniques of Forsythia suspensa

Biological characteristics: like warm and humid climate. Adaptability is strong, cold-resistant, bear barren. I love sunshine. The soil requirements are not strict, humus soil and sandy gravel soil can grow.

Cultivation techniques: seed, layering, cuttage propagation. Seed propagation: sowing in the north from the end of March to the first ten days of April and in the south from the first ten days of March. Soak the seeds in warm water at 50℃ for 10~12 hours before sowing, take them out, dry them and sow them. Or in September to October, the seeds were stratified with wet sand, and then taken out and sown in spring, which could improve the germination rate. The row spacing is about 30cm, the soil is covered with 1~ 2 cm, and then the grass is covered to keep the soil moist. seedling height of 15~20cm, seedling spacing of 10cm, and topdressing with human and livestock manure, transplanting in autumn of that year or early spring of the second year. Laying propagation: before the rainy season arrives, the longer branches of the mother plant will be bent downward, buried in the soil near the mother plant for 3~4cm, then irrigated, often kept moist, transplanted in early spring of the second year. Cuttage propagation: After autumn defoliation or before germination in early spring, choose 1~2-year-old healthy branches, cut about 20cm long, leave only the upper 2~3 leaves, and remove the rest of the leaves. According to the row spacing of 5cm× 15cm, insert into the seedbed, make the cuttings expose 1~2 nodes on the soil surface, irrigate immediately after insertion, keep wet frequently, fertilize 20~30 days after cuttage survival, 3~4 times, transplant in the same year. When transplanting, open the holes according to the hole spacing of 2m ×1.5m, apply a small amount of humus mature compost or manure, make the roots stretch naturally when planting, bury and compact. Forsythia fruit bearing rate is very low, must make the long style plant and short style plant alternate cultivation, can improve the fruit bearing rate.

Field management: reasonable pruning must be carried out during the growth period to remove the weak and leave the strong in order to bear more fruits. When winter pruning, thinning is the main method, short pruning is the auxiliary method. In addition to each pier to maintain 3 to 7 vigorous trunk, the rest of the thin, withered branches can be cut off as appropriate. After pruning, topdressing or manure, compost plus calcium superphosphate, etc. should be applied, and soil should be covered after furrow application beside the plant. In June, the redundant long branches newly emerging from the base should be removed, and the work such as intertillage weeding and topping should be carried out according to the specific conditions.

Pest control: diseases have blight.