Alternative Gardning: Build a Greenhouse With Old Windows. I would do this if I had a bunch of old windows laying around.
Old Window Ideas - Modern Magazin - Art, design, DIY projects, architecture…
DIY mini greenhouse made of salvaged windows, reader remodel contest 2013
30 greenhouses made from recycled windows & doors. Some are just exquisite. Pigeon loft, Chicken house or Green House!