[Platycodon grandiflorum planting technique] Ten points for attention in Platycodon grandiflorum Culture

Platycodon grandiflorum flower has both ornamental and medicinal effects, so it is very worth breeding, so what do you need to pay attention to?

Growth habits: Platycodon grandiflorum has the characteristics of light, humidity, cold resistance and wide adaptability. The germination rate of annual seeds is 50%, 60%, and the germination rate of biennial seeds is about 85%, and the germination is fast and uniform.

Land selection and preparation: it can be very cold-resistant, the soil should also be deep, fertile and well drained, and the sandy loam rich in humus is the best. It is not suitable to grow it in low-lying and stagnant places. Apply soil circle fertilizer 3000kg per mu, add calcium superphosphate 20kg or diammonium phosphate 15kg, spread evenly in the ground, deep ploughing 25-30cm, level Harrow fine, make 1.2m-1.5m wide, 15m high border, long and short depending on the topography.

Seed treatment: Platycodon grandiflorum seeds should be more than 2 years old non-mature seeds, 1.5-2 kg per mu. The seeds of Platycodon grandiflorum were soaked in about 40 ℃ of warm water and stirred constantly to let the seeds be heated evenly. Rinse with clean water until the temperature dropped to about 20 ℃ to remove impurities. Soaking the seeds for another 12 hours, or soaking the seeds with 0.3% potassium permanganate solution for 12 hours, then mixing well with appropriate amount of wet sand, stacking for a few days and then planting can significantly improve the germination rate.

Sowing at the right time: the sowing time of Platycodon grandiflorum should be in April or September in Jiangnan, and it will blossom every other year after planting. According to the summary of some planting units, sowing in April is better, because the seedlings are slightly larger, which is conducive to overwintering management. Cover soil 1 cm after sowing, often keep moist, germinate at an appropriate temperature of 15 to 20 ℃, and emerge in 15 to 20 days. The height of the seedling is 3 cm, and when it is 6 cm, it is planted or on the pot. In the family, ramet reproduction is the easiest, which is carried out in spring and autumn.

Weeding and loosening soil: Platycodon grandiflorum flower after emergence, it is necessary to weed it, and when its seedling grows 4 leaves, it is necessary to remove the weak seedling for it. It is suitable to loosen the soil when it is dry and wet, and we should always keep the soil loose so that its field is free of weeds.

Light temperature: after flowering, it is appropriate to shade properly to prolong the flowering period. Cut off the ground over the winter and put it in a place where there is plenty of sunshine and no freezing in winter, and new branches will be issued from the old roots next year.

Irrigation and drainage: spring and autumn are generally watered once every 3 to 4 days, once after 5pm every day in summer, and generally not watered in winter. Platycodon grandiflorum planting density is relatively high, so it is afraid of stagnant water, so we should timely drain ditch water for it in the hot and humid plum rain season, so as not to prevent the rotting roots caused by stagnant water.

Appropriate fertilization: apply calcium superphosphate 1 or 2 times before flowering to make the flower color pure. After flowering, apply a mature bean cake liquid fertilizer in time to benefit the growth of roots.

Flower picking and pruning: the flowering period of Platycodon grandiflorum can be as long as 4 months, it will consume a lot of its nutrients when it blossoms, and it will be easy to sprout lateral branches, so our flower picking is an important measure to increase the yield of Platycodon grandiflorum.

Pest control: red spiders are harmful to drought. Dimethoate can be sprayed with 2000 times dilution.

The above ten items are the things we most need to pay attention to in the process of planting Platycodon grandiflorum. I hope that through the above introduction, we can improve everyone's confidence in planting Platycodon grandiflorum and raising Platycodon grandiflorum flowers.