Unheated greenhouses?
Seems I remember as a kid, us having a homemade greenhouse constructed of heavy duty plastic. I remember we started plants in it, but I dont remember it being heated. Everything I've been reading on here talks about heated greenhouses. I'm just wanting a place to start my seedlings in, as my space here in the house is limited. I live in zone 5, IL. Would a greenhouse need to be heated for starting seedlings?
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