Which side faces up on Weed-X and 20-Year Weed-Shield materials?

The black side of Dalen’s fabric should always face up. The black smooth side is more effective in preventing weed roots from penetrating from above. Placing the white (bottom) side underneath allows water to wick through the fabric and into the soil, which is necessary for plant growth. All of Dalen’s landscape fabrics are correctly oriented on the roll so when you unroll it, the correct side is facing up automatically.