When is the best time to plant cosmos seeds?

Cosmos seeds planting time

Cosmos is a perennial herb whose seeds are usually sown in spring from April to May. When the temperature is stable at 20℃, it is most suitable for seed germination. It usually takes only 5-8 days from sowing to germination.

How to plant cosmos seeds

1. Soil preparation: Cosmos likes soil with good air permeability. It can be prepared with humus soil, garden soil, river sand, and add appropriate amount of base fertilizer to the soil.

2. Seed germination: Cosmos seeds must be soaked for germination before sowing. Soak the seeds in warm water for about half an hour, and then place them in a wet paper towel for germination.

3. Planting: Spread the seeds evenly on the surface of the soil, then cover with a thin layer of sand, and do a good job of post-management.

Cosmos seeds collection

The flowering period of Cosmos is from June to August, and the fruiting period is from September to October. The seeds are very easy to collect. Generally, they are collected after the flowers have faded. The collection part is the top of the flower. After the fruit turns black, it can be collected.

What does cosmos seeds look like?

The seeds of Cosmos grow inside the fruit. They are black-purple in color, about 8-12 mm long, hairless on the surface, with a long beak at the top, and the seeds have a good ability to break through the soil.