Here is what you might expect if you plant onion seeds directly in your garden.
Corn is always planted directly in the garden where it will grow. Plant on the day of your last average frost in Spring, or up to a month after that date.
Thanks, james! Once again you helped me understand and quit blaming myself! I always wondered why I didn't get nice big onions. It's because I grow them from seed. Actually I get bigger onions than those, but that's because right now I am harvesting the last of last year's onions from seed and then planting more seed. So they stay in the ground from 9 to 12 months. And still they don't get nice big bulbs like the ones you grow.
Onion sets are just so expensive and tend to come in bunches of more than I can use. Onion seed is super cheap!