I put onions in whenever in the summer. They are not like spinach or peas that need the cooler weather, they should do fine.

I may order some more sets.

Short day onions do better in the winter.

I'm pulling the last of my short day out now, I planted long day red onions a month ago.

what temp zone do you live in?

Are Copras long day or short day?

Also they store really well.

Good luck and post picts when you harvest.

Cheers!

The latter two put out extensive root systems even if the produce isn't edible because of weather. That builds the soil. Onions are just good. They grow easily from seed and sets, but seed is cheaper. You can also sow them in the late summer and over-winter them for spring harvest.

But they are taking for-dang-ever.