Not all of us can devote the money or space to a full-size greenhouse, but anyone can get into gardening with a mini greenhouse. Instructables user kcrox1017 posts simple plans for a mini greenhouse will help you protect your seedlings from any unexpected cold snaps, and start growing them ahead of mother nature's schedule. While he used an old window, with a little extra tweaking, you can use a sheet of scrap glass or acrylic instead. On the other hand, if the idea of keeping a greenhouse and the accompanying garden sounds like too much work, you might find a wine bottle terrarium to be all the green you need. For details on his project, check out the full tutorial below.