Onion sets are cheap.
Cheap!
$1.50 for a bag of sets. You can't beat that.
Way better entertainment than a movie - and it'll keep the whole family busy.
Way cheaper than a gym membership and gardening is better exercise anyway [at least at my house. If you don't believe me, you're welcome to come help for a day and I'll prove it.]
We like the red and the yellow onions best.
I planted half of each of these bags plus the onions from the pantry that had sprouted. I plant them all the way around the edges of the garden beds where they're easy to get at.
The last half of each bag will go into the ground in the hoop house in September so we can have onions all winter long.
If you're going to plant just one vegetable this year, this is a good one to start with. Really easy.