Mold/mildew on concrete - Knowledgebase Question

Mililani, Ha
Avatar for karenasano
Question by karenasano
June 30, 2010
My backyard is covered with cement and I water my plants every day. The concrete is turning black with mildew??. What can I do to eliminate this unsightly condition and keep it from reoccuring?

Answer from NGA
June 30, 2010
Power washing or scrubbing with a stiff brush will remove the mildew but it will return as long as the concrete remains wet or gets wet on a daily basis. About the only way to stop it is to put trays beneath your plants so the excess water doesn't run out onto the cement. Wish there were a permanent solution!

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