Planting time: Cosmos is planted in April every year. Prepare the soil: Use leaf mold soil, garden soil, sandy soil, and base fertilizer to prepare the soil. Seed selection and germination: Select fresh, plump cosmos seeds and soak them in warm water for germination. Sowing with sand: Evenly mix the seeds and fine sand, and then plant them into the soil.

Cosmos planting method

1. Planting time

Cosmos is usually planted in April every year. Sow seeds at this time and they will bloom in June. The flowering period lasts for three months, but the northern region is relatively cold, so planting can be postponed for one month. In addition, if you want the plants to bloom early, it is best to plant in February.

2. Prepare the soil

Before sowing cosmos seeds, you must first prepare suitable soil. You can choose sandy loam with deep soil, loose and breathable soil, and good drainage. If it is a potted plant, For maintenance, you need to use leaf mold soil, garden soil, sand soil, and base fertilizer to prepare soil, disinfect the soil, and then put it into flower pots and wait for sowing.

3. Seed selection and germination

Select cosmos seeds with consistent color, freshness, and full particles, and then soak them in warm water for one to two hours to allow the seeds to absorb water. Sufficient water will help improve the survival rate of plants and shorten the germination time of seeds. Note that the water temperature for soaking seeds should not be too high.

4. Sow seeds mixed with sand

Mix cosmos seeds and fine sand evenly, then spread them on the soil surface, and cover them with a layer of fine soil to prevent exposure to strong light. To affect the germination rate of seeds, after sowing is completed, use a small watering can to slowly sprinkle water to keep the soil slightly moist and maintain the temperature at fifteen to eighteen degrees.