How to plant Platycodon grandiflorum seeds

Platycodon grandiflorum is a common flower in life, which has high ornamental value. Many people like to plant some at home. How to plant Platycodon grandiflorum seeds?

1. Seed selection

There are many varieties of Platycodon grandiflorum, which can be divided into early, mesophytic and late varieties. The suitable cultivation periods of early varieties are March, August and September, and the suitable cultivation periods of mesophytic varieties are March, July and August. The suitable cultivation period for late varieties is from March to July, while the seedling stage is usually two months. Therefore, according to different varieties, sowing should be chosen about two months in advance before it is suitable for transplanting.

2. Soil selection

First prepare the seedling soil or seedling block, if it is a substrate, choose a slightly alkaline substrate with a pH value of 6-6.5, you can use peat to add some vermiculite and perlite, stir in some carbendazim, and then disinfect the substrate. to prevent the growth of bacteria. Water the substrate thoroughly before sowing to keep it moist.

3. Sowing seeds

The seeds of Platycodon grandiflorum are very small, like dust, so you can use a toothpick to stick some water, click on the seed, stick to the toothpick, and then plant it in the seedling basin. After sowing, do not cover the soil, and then spray some with carbendazim diluent, which can improve the adhesion and antibacterial properties of the seeds. Keep the light, maintain the temperature at about 20-25 ℃, and keep the substrate moist at the seedling stage.

Generally, seedlings will emerge after two weeks. After emergence, transfer Platycodon grandiflorum to a ventilated place and lower the temperature to about 15 ℃. Pay attention to the temperature not exceeding 25 ℃ during the day and not less than 5 ℃ at night. 100-150ppm nitrogen can be applied at this time.

4. Transplanting

Seedlings can be transplanted when they grow two pairs of real leaves, and do not destroy the roots when transplanting. Low temperature, dryness, lack of light and too much nitrogen fertilizer can easily cause bud abortion.

The main results are as follows: (1) Light: tangerine pedicel flowers are sensitive to light, and long-day sunshine is very beneficial to the growth and development of Platycodon grandiflorum, which is helpful to stem and leaf growth and flower bud formation to achieve the purpose of early flowering. Generally, 16 hours a day has the best effect.

(2) temperature: Platycodon grandiflorum likes to be warm, the optimum temperature for growth is 15-28 ℃, and the night temperature during the growing period is not lower than 12 ℃. When the winter temperature is below 5 ℃, the leaves are rosette and can not blossom. It can also withstand 0 ℃ low temperature for a short time. When the temperature in the growing period exceeded 30 ℃, the flowering period was obviously shortened.

(3) watering: Platycodon grandiflorum likes wet environment, but excessive water is disadvantageous to the root growth of Platycodon grandiflorum and is vulnerable to diseases. After bud formation, high temperature and humidity should be avoided, otherwise it is easy to cause fungal diseases. At the same time, during the growing period, there was insufficient water supply, weak growth of stems and leaves, and early flowering.

Generally speaking, Platycodon grandiflorum seeds are very good, as long as choose a good soil or substrate, and then evenly sow the seeds on it, and finally cover the film, appropriate watering on it.