How to Install Weed Barrier Fabric: A Step-by-Step Guide
Weed barrier fabric works best when the bed is prepared, the strips overlap and the edges are pinned. This guide covers where to use it, how to lay it, how to plant through it and what to avoid.
Weed barrier fabric, also called landscape fabric, is a sheet that lies on the soil under mulch or gravel. It shades the ground so fewer weeds grow up from below, while a woven fabric still lets water through. It works best when you prepare the bed first and lay it carefully. This guide covers where to use it, the steps to install it and the mistakes to avoid.
Where weed barrier fabric works well
- Under gravel or stone in paths, around patios and in dry garden beds.
- Under mulch or bark around shrubs, trees and permanent plants.
- Around raised beds to cover the strips of ground between them.
It is a poor fit for beds where you often sow seed, divide plants or dig in compost each season. Weeds can also grow from seed that lands on top of the mulch, and the fabric does not stop those.
What you need
- Weed barrier fabric in a width that suits your bed
- Landscape staples or pins
- Scissors or a utility knife
- A rake, a tape measure and gloves
- Mulch, bark or gravel to cover the fabric
Step 1: Clear and level the bed
Pull out the weeds with their roots, remove sticks and stones, and rake the soil level. Big lumps will push up through the fabric and make it hard to lay flat. If you plan to plant, do any soil work and add compost now.
Step 2: Measure and cut
Measure the bed and cut the fabric a little longer than you need. Fabric tends to shift when you pin it, so a few extra inches at each end give you room to adjust. A woven fabric cuts easily with sharp scissors or a utility knife.
Step 3: Lay the first strip
Unroll the fabric along the edge of the bed. If the roll has guide lines, run them along the row so the strip stays straight. Smooth it out with your hands, and pull it snug but not tight, so it can follow small dips in the ground.
Step 4: Overlap the strips
When you need more than one strip, overlap the edges so that no soil shows through. A common overlap is about 4 to 6 inches, and the manufacturer's instructions may call for more. Any gap lets light in, and weeds find gaps.
Step 5: Pin it down
Push landscape staples through the fabric along the edges and across the overlaps, roughly every 3 to 4 feet. Add extra pins on slopes and in windy spots. Press each pin all the way in so that the head sits flush and does not snag a rake or a trimmer.
Step 6: Plant through the fabric
Cut an X where each plant will go, slightly bigger than the root ball. Fold the flaps back, dig the hole, set the plant in and fold the flaps down around the stem. Do this before you add mulch, so you can see the fabric clearly.
Step 7: Cover it with mulch or gravel
Spread two to three inches of mulch, bark or gravel over the fabric. A cover shades the fabric from the sun and holds it flat. Do not leave it bare for long, because open fabric can wear out faster in strong light and the pins may loosen.
Common mistakes
- Laying it over existing weeds instead of removing them first.
- Skipping the overlap, or using too little.
- Using too few pins, so wind lifts the edges.
- Covering it with a thin layer of mulch that lets the fabric show.
- Piling soil or compost on top, which gives weed seeds a place to root.
Keeping it in good shape
Check the pins after winter and after strong wind. Pull out any weeds that sprout in the mulch while they are small, and keep sharp tools and string trimmers off the surface. If the mulch thins out, top it up.
A quick checklist
- Clear the weeds and rake the bed level.
- Cut the fabric a little long.
- Lay it straight, with guide lines along the row.
- Overlap the strips by at least 4 to 6 inches.
- Pin the edges and overlaps every 3 to 4 feet.
- Cut an X for each plant.
- Cover with two to three inches of mulch or gravel.
If you need a roll, the weed barrier fabric, 3 x 50 ft, 5 oz is a black woven ground cover with green guide lines along the roll. One roll covers about 150 sq ft before overlaps and weighs about 5.1 lb. Landscape staples and edging are not included. You can find more garden items in our Plants & Garden collection.