In order for the seedlings bloomed at the same time the seeds should be planted in late summer or early fall In the spring sowing on seedling emergence to the entry of plants in the flowering stage is 4 months old

What is the correctly punctuated version of this sentence?
In order for the seedlings bloomed at the same time, the seeds should be planted in late summer or early fall. In the spring sowing on seedling emergence to the entry of plants in the flowering stage is 4 months old.