Wow! There are a ton of material options for square foot boxes and raised beds.

We finally settled on Orcaboard

We had several needs that directed us to this product. Termites are an issue here, so having wood on the ground isn't the best choice.

We wanted something that would last a long while. I saw them as an investment. 

 

I also wanted something earth friendly and liked that they were recycled milk jugs.

We got the weed barrier and plastic underneath them, and filled them with Mel's Mix of 1 part Compost, 1 part vermiculite, 1 part peat moss.