Flagstone Walkway



I have a flagstone walkway which is in heavy shade. It has now turned color and is getting pretty black and green with mold. I also have plants in between the stones and don't want to do anything that would kill them. What should I use to clean the flagstone?

ANSWER
That can happen, particularly with a flagstone walkway that gets little or no sun. I've done some research and came across two solutions.

The first is to use straight vinegar in a spray bottle. Let it sit for about 15 minutes and then rinse with water.

The second option is to use a product called Bio Wash. It will not hurt plants and is made to use on stone with Algae, Fungus, etc. problems.

If anyone else has any solutions, please post them here...thanks.

Susan

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Bluestone Walkway - How To Clean It Safely

by Jim J
(Atlanta)

We have a bluestone walkway and porch on the front of our house and want to know how to clean it safely; it is trimmed in brick and looks great, or should I say looked great; the bluestone needs cleaning, because it has darkened and stained through the years. I'm not sure if it is mildew or what?

What are your suggestions to get it cleaned...just powerwashing with soap & water or I've read about a product called HMK R60-Mildew/Organic Stain Remover. My concern it that I have zoysia grass next to the walkway and plants along the porch and certainly don't want to harm either one. Thanks in advance for any direction you may be able to provide.
Jim

ANSWER

Hi Jim,
Regarding your bluestone walkway, I just did some research for someone else who had the same problem. (It is probably a mildew.)

Below are links to the information I found. The chemical in the second link appears to be safe for plant material. (I took a quick look into the product you mentioned above, and did not see any mention about being safe for plants).

http://www.ehow.com/how_4895213_remove-flagstone-mildew.html

http://www.prosoco.com/ProductDetail.asp?ID={85969DA7-2C58-47D6-B313-53DF0200982D}

I would start with the vinegar first.

Good luck and let me know how you make out.

Susan

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"Susan,  what a pleasure it was to work with you.  You made me feel like I was your only client - responding late at night and always so quickly!  Your design is amazing and we only hope we can do justice to it when we plant.  You have such fantastic ideas and you are so open to suggestions and changes.  Loved working with you - now if you could only come to Canada and plant it!!!"
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