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Removing Fertilizer Stains from Patio Slabs

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  • 05-10-2023 5:18pm
    #1
    Inforapenny
    Registered Users Posts: 132 ✭✭


    Unfortunately got some fertilizer on parts of the patio paving slabs.

    Slabs are granite & light in colour, however, now lots of orange rust marks on the slabs due to the iron from the fertilizer

    Anybody have experience with something that works to remove the stains?

    Google tells you to try white vinegar or lemon mix but then reports from people that it didn't work.

    Thanks



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    #2
    okedoke
    Registered Users Posts: 924 ✭✭✭okedoke


    The same thing happened to me with 4 in 1 (lawn feed/weed killer and moss killer). Lots of ugly rust stains on limestone slabs. It’s the moss killer does it.

    it wore off eventually - it took several months. I just use plain lawn feed now, no moss killer



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    #3
    Jim_Hodge
    Registered Users Posts: 10,686 ✭✭✭✭Jim_Hodge


    A 1:1 mix of water and vinegar sprayed on it can sometimes sort it. Try on a small area first.



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    #4
    JackChapman234
    Registered Users Posts: 1 ✭JackChapman234


    Not allowing me to post a link but search for Rust Ex. Great product



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    #5
    The Continental Op
    Registered Users Posts: 6,733 ✭✭✭The Continental Op


    Net-trol might do it https://www.owatrol.ie/product/net-trol/ check the comments/reviews of the product.

    But sit down before you check the price.

    Wake me up when it's all over.



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    #6
    chrisd2019
    Registered Users Posts: 472 ✭✭chrisd2019


    https://www.boards.ie/discussion/2058316933/removing-fertilizer-stains-from-patio-slabs

    Vinegar will work, as the acid effectivly removes the strained stone layer on top. But it needs time to work and the stronger the acid the better. Phosphoric acid based gel toilet cleaner is another option. Do use suitable ppe gloves, glasses ect. and do a small spot first. the deeper the fertilizer penetrated the longer it will take to remove.



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