What to use to protect the inside of a raised bed (part brick part wood)?
I'm in the process of finishing off a triangular raised bed. Two sides of the triangle are brick, and the remaining side will be thick wood.
Would it be a good idea to line the inside face of the bricks so that they are not damaged by the soil resting against them? Or will they be ok left as is?
The wood will definitely need protecting because we are most likely going to use untreated stuff. What can I use to protect the wood? I was thinking of using some of the damp proof plastic rolls you can get, or some pond liner, or some other black plastic. Are there any other options? What would be the most effective and the cheapest?