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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.
  • raised bed and trellis, gardening, raised garden beds
I cut the metal with a metal blade on my jigsaw. No need for all the other fancy tools Home Depot said I needed!
  • raised bed and trellis, gardening, raised garden beds
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!
  • raised bed and trellis, gardening, raised garden beds
By securing the two 8′ sections together with more metal screws, the raised bed became much more stable.
  • raised bed and trellis, gardening, raised garden beds
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!
  • raised bed and trellis, gardening, raised garden beds
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.
  • raised bed and trellis, gardening, raised garden beds
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.
  • raised bed and trellis, gardening, raised garden beds
It took 2.5 cubic yards of soil to fill this monster bed.
  • raised bed and trellis, gardening, raised garden beds
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.
  • raised bed and trellis, gardening, raised garden beds
Now it’s time to wait for the weather to warm up to plant and enjoy the backyard.

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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