What I am looking at has opaque lids. If I try this I will drill one inch holes all around the sides for venting. I also might use a thermometer and monitor the temps before trying it with plants.
I can start with few holes and add until I get what I need.
Or I could modify the lid by adding hinges and making it where I can adjust the opening like a real cold frame.
I figure part of the fun is trying different things. Even if in the end it doesn't work well it is something learned.
Will probably just build the real thing soon.lol
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