Raised bed / planters made of wood crates - what to line with
I have some really nice crates i am going to make raised beds / large planters. The planks have gaps though, so i need to either add more wood (but they look nice as they are) or line them with something.
I have some weed suppressant fabric, but this will allow any water to seep out, so i am thinking thick black plastic? I know that will degrade in the sun though, so not sure. Any ideas?,