Hope someone can help.
I help an elderly chap with his garden. He has a deep 3m border which only has a couple of shrubs and an apple trees in it.
Every time I help out I spend most of my time digging over this border in order to try and keep mares tail under control - ha!
His son has offered to put a weed suppressant membrane down and cover it with gravel. Would this work and enable me to attempt the rest of the wilderness Garden?
The rest of the garden is mainly crazy paving surrounding a few beds, all of which has been infested by mares tail and brambles. I intend ripping mares tail out by hand and just trying to keep that under some kind of control 
I'd like to get his garden under some kind of control for him - he lost his wife a couple of years ago and the garden was her pride and joy. It upsets him to see it gone to seed.
TIA