Soil Strategies for 3 foot (3') Raised Bed
I am looking for strategies to minimize the amount of soil I need to add to some moderate sized but fairly tall raised garden beds. (3 ft tall and 72 sq ft - 8 cubic yards each).
We will be planting vegetables in these beds. The beds are tall for decoration, convenience, and to attach benches to the beds to accommodate social gatherings.
My concerns (no particular order):
- Weight at the bottom of the box for soil 3' tall.
- Leaching (if using plastic products as a filler).
Lumber will be 2x12 Redwood or Cedar on the box. Boxes are framed in concrete with dirt bottoms. Bottom board will be submerged about 1 inch below concrete for support. I also have posts submerged in concrete about every 4 feet for support of the box.
Thanks for any insights and recommendations you may have.