What season is Platycodon grandiflorum? How do you plant it?

Platycodon grandiflorum is a kind of ornamental flower whose flower color is dark purple or dark purple-white. The flower shape is beautiful, so it is especially suitable for planting in the park or making flower sea. The root system of Platycodon grandiflorum has certain medicinal value and edible value. Platycodon grandiflorum flowers are mainly distributed in China, Korean Peninsula, Japan and eastern Siberia. Let's take a look at the season of Platycodon grandiflorum. How to plant

What season is Platycodon grandiflorum?

Platycodon grandiflorum blossoms from July to September every year. Flowering is in the middle of summer, Platycodon grandiflorum is purple, very fresh and refined, unique, the shape of the flower is also very special, there are generally five petals, drooping very much like the ancient clock, so people call it a bell-shaped flower.

Second, how to grow Platycodon grandiflorum?

1. Land selection and preparation

Platycodon grandiflorum is a deep-rooted plant. Humus soil or sandy soil with deep soil layer, loose and fertile soil and good drainage should be selected. After selecting the ground, turn it more than 30 cm deep, flatten and rake fine.

2. Sowing seeds at the right time

Platycodon grandiflorum is mainly propagated by seeds, which can be sown in spring, summer, autumn or winter. Can also raise seedlings and transplant, because the direct seeding yield is higher than transplanting, and the root straight bifurcation is less, easy to scrape processing, good quality, multi-use in production. Attention should be paid to using seeds to propagate with new seeds produced in the same year, the new seeds germinate quickly, the germination rate is high, and the seedlings are uniform, robust and beneficial to management. the germination rate of the old seeds in the next year is low or even can not germinate.

In order to improve the germination rate of seeds, the seeds can be treated first. Soaking the seeds in warm water for 12 hours before sowing, mixing well with appropriate amount of wet sand, stacking for a few days and then planting can obviously improve the germination rate. The strip sowing method was used to trench the finished border surface according to the row spacing of 18-21 cm, the depth was about 2 cm, and the soil cover was 1 cm after sowing. Or adopt the more advanced wide strip sowing method, that is, the width of the trench is 10 cm, the line spacing does not change, cover the soil after sowing, wide strip sowing method has many advantages, such as simple management, good quality of finished products, and so on. The temperature is suitable and the seedlings can emerge in about 15 days.

3. Field management

Reasonable close planting: too dense, weak plant growth, vulnerable to diseases and insect pests. Too thin, low yield. If the seedlings are suitable for wide strip sowing, the seedlings are not crowded, and there is no need to remove too many seedlings. Proper close planting is the key to increase production.

Ploughing and weeding: Platycodon grandiflorum grows slowly in the early stage and is easy to breed weeds, so it should be pulled out in time to prevent the spread of grass famine. The planting site should be watered thoroughly first, and when it is dry and wet, the soil should be loosened once, so as not to dry and crack the ground and cause dead seedlings. Mid-ploughing should be carried out when the soil moisture is moderate. After the plants grow up and close the ridges, there is no need for intermediate ploughing and weeding.

Topdressing: rarefied human feces and urine should be applied 1-2 times at seedling stage to promote seedling growth. At the end of June, more fertilizer was applied at flowering stage, mainly phosphorus and potassium fertilizer, to prevent the growth from being affected by excessive nutrient consumption due to flowering and fruiting. After entering winter, it is necessary to re-apply overwintering fertilizer, combined with fertilization to cultivate the soil. In the following year, when the plant height is about 1 meter in spring, the amount of nitrogen fertilizer should be properly controlled, combined with topdressing phosphorus and potassium fertilizer to make the stem grow sturdy, which can prevent or reduce lodging.

4. flower thinning, fruit and vegetable thinning and drainage

Platycodon grandiflorum has a long flowering period, which consumes a lot of nutrients and affects root growth. In addition to staying in the field, thinning flowers and fruits can improve the yield and quality of roots, and buds can be removed manually, such as cutting buds with a sickle. Or with multiple frustrations, sprayed in full bloom, can prevent flowering.