How to Build a Square Foot Garden Frame

Square foot garden frame

This is how to build a Square Foot Garden Frame from 2x6s and 4×4 lumber. Mel Bartholomew, years ago, wrote the book Square Foot Garden and this frame is based on his 4 foot square design. Any wider and you can’t reach to the center. You can find info. all over the web on designs. This is how I did mine.

I made the sides from 2″x6″ common lumber 43 1/2″ long. End posts are 4″x4″s  9″ long. When I do it again I will use 2″x8″ lumber for the sides to get more depth. Then the 4x4s will be 3″ taller than the sides.

Square foot garden frame cutPosts Square foot garden

The posts are cut to a 30 degree angle for decoration. I used a table saw. You could use a mitre saw or even a circular saw with a cutting guide. Pre-cut the 4 posts and clamp them together for a stable surface, if you do it with a circular saw.

Attaching sides square foot gardenframe attached square foot garden frame

Using a Kreg Pocket Hole Jig I attached the sides. You could use dowels. Pocket hole screws were easiest. Since I didn’t used treated lumber, I don’t expect this frame to last forever. Using caulk, primer and paint will help it to last longer. I use thin strips of wood stapled together for the grid. You could just use string tacked to the sides.

Square foot garden frame plantedSquare foot garden trellis

The best thing I added was a trellis to the north side of the frame. I grow beans and peas on this. It is made from 1/2″ electrical conduit you can get at any home improvement store. You will need two 10 foot sticks of 1/2″ metal conduit, four conduit clips and 2 corners. You will also need trellis netting. The conduit was cut 60″ tall for the sides and 45 1/2″ for the top. It is best to cut and mount the sides loosely first and then measure the top length. There can be variations.

trellis cornerattach trellis to frame

I have been using this frame for 4 years now. What I would do different. Make the sides with at least 2x8s instead of 2x6s. Deeper the better. Look around on the web on how to make the soil. I used some from a local fertilizer place and it was terrible. Locate the frame where it gets sun all day.