What zone are you in? I am in zone 9 and grow them year round. As soon as the ground is not frozen, get them in!
Here in MD zone 5 we plant in the spring when the frost is over.
Not sure what zone VA is in but I plant them in March. Even though there are onion seeds use onion sets which are similar to bulbs for spring flowers.
I plant mine end of January first part of February.
Get my onions tips here: