I'm not sure I've seen canned spinach? Surely they could can it, but I've always bought fresh or frozen. Have you looked for frozen?
You've never seen canned spinach?? I see it all the time in the stores and it's what I grew up with. Remember when Popeye would squeeze the can of spinach and it would open? Now, while I've seen plenty of regular canned spinach I can't say as though I've seen any organic.