I've started a new bed in front of the bay window of our house. I dug about 2' down and about 2-4' across (yes, that's a lot of dirt). Our soil is caliche and clay so I'm starting with all new soil.
I put landscape fabric in the bottom but I'm at a loss what to put along the sides. We have a couple of trees and tons of weeds and centipede grass, so I don't want those to get into my bed. What can I use to deter unwanted growth?