What is the solar term for sunflower growth every year?

According to the application requirements, it can be sown all year round. If flowers are used in May, sow in February-March; 65438+ flowers in October, sowing in August. Ornamental sunflower seeds are large, with 25-50 seeds per gram, and the optimum germination temperature is 2 1-24℃. In the open field, hole sowing is commonly used, and on-demand discs are used for on-demand sowing, and germination occurs 7- 10 days after sowing. The germination rate is 80%-90%. Take potted dwarf species as an example. It takes 50-60 days from sowing to flowering.

Please adopt it without doubt.