Multiple onion harvests
My DH loves onions, especially the pungent cooking onions. I can only store about 2 months/40 - 50 pounds, so I need to harvest several times a year. We live at Latitude 42.66 (gotta love google!) in zone 6. I have a small unheated greenhouse, and am exploring Coleman style tunnels.
So far I have tried sets, Home Depot. Harvested about ten pounds of smallish onions in July. Tasty but that's not even 2 weeks worth around my kitchen, especially when he gets into Sunday omelets.
This year I am targeting copra, for storage, and the 'makes excellent french onion soup' line from Territorial. Any suggestions on how to get multiple harvests? Other varieties? Culture? Suppliers?