In the past I've mostly planted the Stuttgarters. I need a long keeper, but want to plant one of the sweeter like Candy or Walla Walla. I'm Zone 5a.
My great uncle always said an onion likes sun on their shoulders and if you want large onions, space them out so they have room to grow. Onions will naturally grow out of the ground, but you can pull the dirt away from them too. When you harvest, let the sun dry them for a few days and don't braid unless the tops are really dry.
I usually dry mine on old window screens, taking them in to the garage if a rain or heavy dew is expected. I also clean off the dirt and loose skins.
