no blossoms on cosmos

Question

No blossoms on cosmos plants that look very healthy otherwise. These plants are self seeded in raised garden plot.

Answer 1

Cosmos plants take a while before blooming, so depending on when you started them, they simply may not have reached maturity yet. Too much nitrogen in the fertilizer is also a common reason.

This article may help you determine the reason your Cosmos plants aren't blooming:

https://www.gardeningknowhow.com/ornamental/flowers/cosmos/cosmos-not-blooming.htm