You likely have a concrete drive if you searching for ways to get rid of moss on a drive. True moss plants thrive in damp shade, but certain species tend to grow on concrete. The Barbula vinealis and Bryum capillare species find concrete irresistible because it provides access to water and nutrients. Physical and chemical methods effectively work to get rid of moss on a drive, but if you do not change the conditions that favour moss growth, the moss will return.
Scrub small moss patches with a wire or stiff-bristled brush. Fill a spray bottle with a 20 per cent chlorine bleach and hot water solution. Spray the area and allow it to set for two minutes before scrubbing. Continue to apply the solution until the moss is removed, then rinse with clean water.
Use a backpack sprayer to get rid of large moss patches. Combine one part bleach to three parts hot water in the sprayer tank. Spray the area and let stand for 30 seconds before rinsing. Repeat the application until the moss lifts away from the drive surface.
Dust wet moss with powdered copper sulphate as an alternative to bleach. Or spray areas up to 1,000 square feet with a mixture of 3 tbsp copper sulphate to 5 gallons of water. Copper sulphate reacts with water and releases slowly. Copper sulphate does not stain concrete but does stain brick.
Prevent future moss growth on the drive. Allow more sunlight to reach the surface by pruning tree branches that provide shade. Sweep up leaves and clods of grass that retain moisture. Adjust the sprinklers so the spray does not hit the drive.
Test the bleach solution on a small area of concrete before applying it to a large area. Bleach products that are specifically designed to treat moss are available in garden centres.
Do not use bleach near flower or vegetable gardens or landscaping as the chemicals burn foliage. Wear gloves and old clothes when using chemicals.