Hi guys, I'm insistent on getting the materials for my vegetable garden edging this weekend. I've delayed for too long and messed around with too many ideas that don't work! I was going to use corrugated tin sheeting cut in three (~1' high), pegged down with riobar. I then changed my mind to using PVC steaks from Bunnings, which ended up being PVC coated steel. There goes that idea... How about sleepers or rocks or something? What's the best material to use. Economics also play a factor. I really need something that's going to hold in my sheet mulching - I don't want to be walking all over horse poop! Cheers.