How to Remove Algae From Paths

If you live in a climate that gets a lot of rain, you may notice an unattractive green, powdery film or deposit developing on your stone or wood garden. It could be algae. Once algae starts to collect on a pathway, it may render it slippery when wet. In areas with large trees, you will notice that shade and moisture create an environment where algae thrives, especially in the late winter and spring months.

Water
Bleach
Water hose
Broom or scrub brush

Instructions

- 1
  Mix a solution of bleach and warm water. Use ¾ cup of bleach for each gallon on water. Household chlorine bleach will do the job. If you have concerns about the environment, use oxygen bleach instead. Avoid bleaches that gel or become thick since it tends to sit in one spot. This will make it harder to give the surface an even cleaning.
- 2
  Pour the solution onto the pathway and let it sit. After about five minutes use a broom or scrub brush with thick, hard bristles to work the solution into the pathway. If you have a large pathway, work in sections so that you can control the amount of bleach on the pathway.
- 3
  Rinse the bleach solutions from the pathway with water from a garden hose.
- 4
  Repeat the process two or three times if necessary to remove all of the algae.

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