I was curious if I could recycle some corrugated cardboard to lay down under my dirt/soil to protect from weeds/animals or if that black mesh that is typically used is far superior. Thanks, David
Starting an in-Ground Raised Veggie Bed
Certified GKH Gardening Expert
You can use a metal mesh or hardware cloth at the bottom of the raised beds to keep any critters from tunneling under the garden bed.
I personally do not have an issue with tunneling animals in my garden, and skipped this step.
I would avoid using the cardboard at the bottom of the bed, unless you use the 'lasagna method' in the raised beds.
Here are some links with more information.