Build a Seed House/Mini Greenhouse. Make a small greenhouse for starting seeds earlier to extend the growing season! The window will help trap heat inside the box so that it will warm up and you can plant seeds a little earlier.
3 Easy DIY Greenhouses for Under $300. It’s seed-starting season and spring is just around the corner. If you’re looking to start seeds indoors and realize that you don’t have enough windows space to sprout seeds indoors, or don’t want to raise your electrical bill by installing grow lights, building a greenhouse from recycled and salvaged items might be the solution you need.
DIY Raised bed cold frames. Good concept, example shown is too wide to service center square feet when the frames are installed for the winter. (Rule of thumb says, "Never have to reach further than 2 ft. into a raised bed which makes four feet the widest span with access from both sides; 2 ft. the widest span if the raised bed is against a wall or obstruction or has a hinged cover mounted on one edge.)
How to KEEP CRITTERS OUT of your Raised Beds ~ My Aunt has the neatest way to keep critters out of your raised beds. She made this simple lift off frame with 1×1 and chicken wire. They let her easily access her 'Square Foot Garden' but keep all the critters out of her veggies! GREAT idea!