Land selection and soil preparation: Choose sunny land, plough ahead and apply base fertilizer.
Sowing in the soil: mix the seeds with a proper amount of fine sand, then spread them evenly on the soil surface and cover them with thin soil.
Post-management: proper shading, frequent water spraying and moisturizing, and seedlings can emerge in 7- 10 days.
First, seed selection treatment
Cosmos likes warm environment, and sowing is usually carried out in spring, probably in March-April. During this period, the temperature is suitable, which is convenient for post-planting management and beneficial to seed germination. Seeds with full grains and high maturity should be selected to ensure the emergence rate. In order to improve the germination rate, the seeds should be treated before sowing, and the seeds should be soaked in warm water of 30-40 degrees for about half an hour. After taking out, put the seeds in a dark environment, and the seeds will crack in about 3-5 days, so you can sow.
Second, land selection and land preparation
Cosmophilus likes a sunny environment and has low requirements for soil. It is best to choose a plot with good light when sowing. In order to promote vigorous growth and better flowering in the later period, it is suggested to turn over the soil once and apply sufficient base fertilizer to ensure that the soil is soft and breathable. If it is a potted plant, prepare a flowerpot of suitable size and prepare soft and breathable soil.
Third, sow in the soil.
The seeds of cosmos are very small. In order to spread them more evenly, it is suggested to add a proper amount of fine sand to the seeds. The treated seeds can be evenly spread on the soil surface and covered with a thin layer of soil to promote better germination.
Fourth, post-management
Although cosmos likes light, it is not suitable for exposure to the sun just after sowing. It is necessary to do a good job of shading. It is suggested to cover the soil with a layer of straw and water it properly to ensure that the soil is slightly wet. If the environment is suitable, the seedling raising time is about 7- 10 days. After the seedlings are unearthed, you can remove the straw and get more sunshine to promote vigorous growth and better flowering.