Here are some ideas for Apartment Greenhouses.
I just love how mini greenhouses look! Plus, I can put ferns in them, so the cats can't eat them. I have the SOCKER greenhouse from Ikea.
Willab Garden - Balkongväxthus Juliana
I have been wanting to buy a bigger one for my balcony. But they are quite expensive.
I have been also wanting to make a DIY Mini Greenhouse out of old picture frames. Like this one:
DIY Picture Frame Mini Greenhouse
This one is out of old windows and could be nice in a living room or balcony.
Old Window Greenhouse
Another idea that I found recently was making a greenhouse out of an aquarium or reptile habitat.
Boho Aquarium Greenhouse/Terrarium
DIY Greenhouse from an small aquarium.
Old Aquarium Greenhouse
Do you have any more ideas? Have you ever made a mini greenhouse?