Looks awful, right? However, the logs/branches are there on purpose to hold down the chicken wire. The chicken wire is there to keep outdoor cats from using my garden as their own personal bathroom. And the leaves...the leaves... well, it's windy here! Stuff blows in.
Now, to protect my plants from the still-below-freezing nights, a sun box is necessary. I picked up this window for $7 at our local Habitat for Humanity ReStore.
Then, my wonderful husband built some simple square frames. (The beauty of these being separate is that I can move and arrange this by myself.) Next, I stacked the frames around the plants I want to protect.
Because I stack the frame on the bed at an angle, to take advantage of the sun, there is a gap on the left side of the frame. I used some styrofoam to cover this gap. It worked perfectly! Last year I had small wood blocks, and they did not work as well as this seal I made.
Then I stacked the next frame, and added the window. It sits in perfectly, but because the window and/or frame are imperfect, there is another small gap I had to cover with styrofoam.
Above is the gap. It would let out a lot of hot air, which defeats the point of creating a sun box!! All of this styrofoam is just leftover packaging that I stored away this winter. Look around, and see what you can find, if you have a gap to fill. Last year I used a rolled up t-shirt to fill this top gap. But, this works so much better!
Finally, here is a picture of my completed sunbox, with happy plants inside!
The above idea is from Mel Bartholomew's book, Square Foot Gardening.