When fabric makes sense
Non-woven geotextile fabric under stone or under mulch can slow persistent weeds on paths, commercial plantings, and beds converted from lawn. It is not a permanent weed cure — organic matter and wind-blown seeds accumulate on top.
Skip fabric in perennial borders where you divide and replant often. Roots and earthworms work best with direct soil contact; fabric creates a barrier that complicates planting and soil improvement.
- Good: stone paths, parking strips, severe weed pressure
- Skip: vegetable gardens, active perennial beds
- Use woven fabric under gravel; non-woven under mulch
- Never use solid plastic — blocks air and water
Installation steps
Remove weeds, smooth soil, and install edging first. Roll fabric shiny-side down (if marked), overlap seams 6–12 inches, and pin edges every few feet. Cut Xs for existing plants; slit lines for new rows.
Cover with 2–4 inches of mulch immediately — UV destroys exposed fabric in one season. Mulch hides fabric and holds it against wind.
Fabric and your mulch depth estimate
Fabric does not change volume math — depth and area stay the same. You may need slightly more mulch the first year as fabric prevents some settling into soil.
Plan for future refresh without adding fabric layers — double layers trap debris and roots. Calculate top-up mulch with our mulch calculator at normal 2–3 inch depth.