To remove moss from concrete, saturate the moss-covered areas with undiluted vinegar, scrub with a hard-bristle brush and rinse with cold water; then sprinkle the concrete with a thin layer of baking soda. Allow the soda to rest for 24 hours before sweeping the area clean.Continue Reading
Pour undiluted vinegar directly on moss-covered concrete. Allow the vinegar to soak in for 10 minutes. Be careful to not spray vinegar on surrounding plants, as it may burn plant leaves.
With a hard-bristle brush, or a steel wool sponge, vigorously scrub the moss-covered areas. Immediately discard any moss debris.
Once all moss has been treated and scrubbed, rinse away the vinegar with cold water, and allow the concrete to dry.
When the concrete has dried, apply a thin layer of baking soda wherever moss was found. Concentrate on any areas where green staining is present.
Allow the baking soda to rest directly on concrete for a minimum of 24 hours. Do not allow the baking soda to come in contact with water during this phase.
Carefully sweep the baking soda into small piles, scoop up the piles in a dust pan and discard.