Gronomics Rustic Elevated Garden Bed and Oil review

This is my review of the Gronomics Rustic Elevated Garden Bed + Oil. You'll see the project:
1) Unbuilt
2) Built and oiled
3) with casters and filled with a garden.

I used this particular oil because it's supposed to be food-safe.

Links to things:

I made a comment that the garden bed was wobbly - I want to clarify, I don't recall it being wobbly until after I added the casters to it, so the wobbliness may just be a consequence of me doing something Gronomics didn't anticipate consumers doing.

I hope someone learns a thing or two from this!

[venetiajohnson]

So I know nothing about gardening but my mother loves it. She's 73 and bending to garden is not very good for her. I bought a couple of these for Mother's day. I see that Miracle Gro makes a raised bed soil that's 1.5 cubic feet. So based on what you said, would I get four bags for the bed?