How to Remove Green Algae From Vinyl Fences

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Vinyl fencing requires less maintenance than a wood fence with its chipped paint and annual or biannual painting. Like vinyl siding, the fence only requires infrequent washings to keep dirt and algae at a minimum. Algae growth normally forms on the side of the fence with less sun exposure. Sun kills algae, but if it cannot reach it, the fungus grows, leaving a dark green swath over the vinyl fencing. Remove green algae and brighten your fence and landscaping.

Things You'll Need

  • Gallon bucket
  • Dish soap
  • Garden hose
  • Stiff-bristle brush
  • Fill a gallon bucket with warm water and 2 tbsp. dish soap. Wet a 6- to 8-foot section of the vinyl fence with a garden hose.

  • Wet a stiff-bristle brush with the soapy water and scrub the algae stains. Use medium to hard pressure with the scrub brush to loosen the algae from the vinyl. Clean the entire wet section with the brush.

  • Rinse the soap and algae from the vinyl with the garden hose. Spray the water starting at the top of the fence, moving downward. Move to the next 6- to 8-foot section and wet with the hose. Scrub the fence in the same manner, working in sections, cleaning the entire fence.

Tips & Warnings

  • For white vinyl fences, you may add 1/4 cup of chlorine bleach to the soapy water to help whiten the structure, but use caution as bleach kills surrounding vegetation.
  • Use a broom to scrub the bottom fence sections to keep from bending or stooping to reach the lower fence level.

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