I need some weed control fabric to use on an install for a hillside. We will be planting Blue Rug and I need about 7500 sq. feet. I can get the 5oz Pro-5 weed barrier from Gempler's at $199.95 for 1500 sq. feet. This is the heavyweight woven fabric with a 20 year life. Or I was wondering can I use the woven polypropylene ground cover also from Gempler's at $184.50 for 3600 sq. feet. This is the material used at the nurseries that they sometimes sit the plant stock on. It also allows water to pass through. What do you think?