Too Late? (experiment farm)

I planted seed of corn yesterday thrice.
Is it too late?

A instruction of the corn seed says that the seed is improved variety.
It's OK to seed until last July.
So I did try that. Could I take in?

I did the corn a week ago at here after strawberry.

These cones were seeded a month ago.

It's evening strong shower with sunder at 9:00 pm.