Moss grows on any surface in the right conditions.

How to Kill Moss on Pavement

by Mary Lougee

Moss (Bryophte) thrives in shady, damp areas, especially in the fall and early winter when it is cooler outdoors. More than 15,000 varieties of moss grow in all U.S. Department of Agriculture plant hardiness zones in moist areas with little sunlight. Pavement that remains damp with little sunlight harbors the correct environment for moss growth and multiplying. Lower areas of pavement with cracks in it are prime areas for this annoying weed. You can remove moss easily with a few household items, clean the green stain it leaves behind and squelch new growth all at once.

1 Cover shrubs, bushes and grass near the moss area on your pavement with plastic sheeting to protect them.

2 Scrub the moss off your concrete with a stiff-bristle brush. Moss has tiny fibers instead of roots and comes off easily with a brush.

3 Measure 1/2 cup of bleach for each gallon of liquid that your garden sprayer holds. Pour the bleach into the sprayer and fill it with water.

4 Put the lid on the sprayer tank, and swirl it in a circle to mix the bleach solution.

5 Pump the handle on top of the sprayer lid to pressurize the bleach solution. Point the spray wand at the green moss stains on the concrete, and squeeze the trigger to disperse bleach solution on them. Keep each moss stain wet with the solution for about five minutes.

6 Scrub the concrete with the brush again to remove moss stains. Reapply the bleach solution as necessary to remove all moss stains and discourage future growth.

7 Remove the plastic sheeting from nearby vegetation.

Items you will need

  • Plastic sheeting
  • Stiff-bristle brush
  • Garden sprayer
  • Measuring cup
  • Bleach

Tips

  • Prune trees and shrubs that overhang your pavement to allow light on it and dry up areas that hold moisture to prevent future moss growth.
  • Adjust water sprinklers and irrigation systems so the spray heads do not water concrete areas and leave the pavement moist to encourage moss.

Warnings

  • Remove moss as soon as you see it growing to prevent falls from slipping on the damp foliage.
  • Rinse your garden sprayer out with ample amounts of water to remove bleach from the tank. Store the sprayer in an enclosed area with the lid off to prevent the seals from drying or cracking.

Photo Credits

  • Hemera Technologies/AbleStock.com/Getty Images