I live in apartment and that back deck is the only place that gets sun and only a couple hours where it's pretty dappled. So I was wondering if I can get a greenhouse if that will help at all and if I should let the sun shine in through an open window in the greenhouse or is it better off closed all up? Also I was thinking of adding a light inside the greenhouse to help and was wondering what kind thanks!
The short answer, is, sorry but no, your ideas are unlikely to work. As Vostok suggested, add some LED lighting. That will.
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the maine question i really want an answer about though is about weather or not to let the light that does shine in through an open window in the greenhouse or always keep the greenhouse closed for the most sun..??