How Do I Clean Mold Off Of Landscape Curbing

[GeoGeo]

How do I clean mold off of our landscape curbing? I asked the guy who washes houses and he tried it, but ended up giving our money back. I don't know if it wasn't working or if it was doing damage to the concrete or what. But I was wondering if anyone else has cleaned mold off of theirs. I would like to give the whole thing a good cleaning, yet not kill my plants.

[raynan]

We just use our power washer on it.

[kaydee]

Power washing will do the trick. I've often wondered if after power washing if one could give the blocks a coat of some kind of sealer to prevent the mold from coming back. Anyone have any thoughts on this?

[CFrance]

Power washing will do the trick. I've often wondered if after power washing if one could give the blocks a coat of some kind of sealer to prevent the mold from coming back. Anyone have any thoughts on this?

They are supposed to be sealed when they are installed, so I would think they could be sealed after cleaning.

[tippyclubb]

My husband uses Wesley's Bleach White which he buys at the auto store. Spray it on the mold and let it sit for 20 minutes or so and scrub it with a wired bristled broom. Hose it down and mold is gone.

[getdul981]

Our landscaper told me that sealing the stone walls would not work. Just use a pressure washer and blast it off a couple of times a year.

[CFrance]

Our neighbor's was sealed, and it looks fine.

[Bobcuse]

I had my blocks installed in Feb 2011 and I sealed them with a heavy coat of sealant recommended for stone and brick pavers. It worked for about 18 mos and then i saw the black mold starting so I pressure washed the wall and resealed. 12 mos later the mold reappeared so I don't think sealing works that well so I just pressure wash annually.

[Billyworld]

power wash and spray household bleach to stop it from coming back.