The general plan… The cost of wood for such a high raised bed was more than I wanted to spend. I switched my plan to corrugated metal, which should hold up better than wood in the long run. I ended up cutting the bottom couple of inches off the metal sheeting on two sheets so I wouldn’t have to dig as deep in the clay. My backyard slopes a couple of inches, so cutting the metal for the higher side was easier than trying to dig in the metal any deeper than I had to.
I cut the metal with a metal blade on my jigsaw. No need for all the other fancy tools Home Depot said I needed!
Trying to dig the trench for the perimeter of the raised bed was much harder due to the existing trellis… In hindsight, I should have made the raised bed first and then the trellis. Oh well!
By securing the two 8′ sections together with more metal screws, the raised bed became much more stable.
How do you cut an 8′ board by yourself? I realize this isn’t the proper way to do it, but I had to go with what I had. I supported the end on a leftover bag of cement and an extra board. It worked!
Adding on the 1″x6″ topper not only increased stability, but also makes a nice bench. They are secured to the 2×4 posts with little triangles of left over 2x4s which mimic the support spans on the trellis and add stability.
I used a scrap pallet to support the middle as I filled the bed with a 50/50 mix of screened topsoil and compost. Originally I was thinking of filling most of the bed with lower quality soil, but the price difference wasn’t that much.
The top 6″ is a square foot mix of peat, vermiculite, and compost. Had I known exactly what I was doing, this project would have taken about 4 days… I spread it out over multiple weekends though.
Materials I used for this project:
- 3 4″x4″x8′ posts, 5 2″x6″x8′, 10 1″x2″x8′, 2 4’x8′ lattice. 3 post caps
- 2 bags Quickcrete
- 5 26″x8′ corrugated metal sheeting, 4 2″x4″x8′, 5 1″x6″x8′ lumber
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