Good way to kill algae / moss on structures?

agoldenbeeMarch 7, 2013

The picture below shows my problem. Obviously there is some overspray (I'm guessing?) but this was mostly this way when we moved in 2 years ago...and maybe has gotten worse over I want to put an end to it.

What product can I use to spray that will kill/remove/clean this green plague off my structure? :)

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calistoga_al ca 15 usda 9

There is a product made for the purpose called 'Wet & Forget'. I bought it on special somewhere but have not used it yet. Al

    Bookmark   March 8, 2013 at 10:05AM
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Fix the sprinklers to prevent it and cut back the ivy. My guess is most of the water is being reflected back out onto cement.
Bleach will kill it also...temporairly.

    Bookmark   March 8, 2013 at 7:58PM
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hosenemesis(SoCal Sunset 19 USDA 8b)

Gee, and I try to propagate the stuff on purpose. I even painted some of my broken concrete to make it look mossy.

    Bookmark   March 9, 2013 at 2:17AM
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nil13(z21 L.A., CA (Mt. Washington))

You can spray a ferrous sulfate solution to kill moss and algae.

    Bookmark   March 9, 2013 at 5:32PM
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We get that every winter during the rainy season,then when it gets nice,warm and sunny it bleaches it out,so I don't worry about it anymore,just let nature take it's course.
Easy peasy.

    Bookmark   March 9, 2013 at 9:12PM
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