How many months can grass heads pick seeds?

Grass heads are generally divided into: spring sowing, summer sowing and autumn sowing.

When you can plant seeds depends on where you come from, mainly for the safety of alfalfa planted in the first year.

If North China is generally planted from late May to early July. The first crop of alfalfa generally needs a growth period of 50 days, the second crop needs a growth period of 35 days, and the third crop needs a growth period of 35 days, and each crop can generally float up and down for 5 days. After the last crop is harvested, the growth period is generally 20-30 days. After turning green, it can grow when the daily average temperature reaches 5℃.