What is this fungus, mold, etc?
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Wanda Forrest on Jun 29, 2013I see a pipe there. Does rain water come down that pipe? That might be enabling mold to grow. We have one side of our house that molds on the vinyl siding (the north side that is shadiest), so I understand what you mean.Helpful Reply
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Joan on Jun 30, 2013Could be calcium or salt build-up from water or mulch...could be accumulation of something from the concrete sidewalk as picture shows, to me, slight unevenness, causing build-up. Just some ideas.....good luck....Helpful Reply
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Nancy Hand on Jun 30, 2013Can't really see what it is, looks like snow. :) Need a closer pix.Helpful Reply
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Gloria Rosello on Jun 30, 2013well I can not see either , but fungus is a black stuff that can adhere in the superficies, alga is the green stuff that also growth with the accumulation of water, and the mold is a kind of fungus . Hold on no panic if it is in the floor well the solution of the problem is put bleach , bleach is the magic thing for almost every thing yHelpful Reply
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Terry Thomas on Jun 30, 2013If you are using chemical fertilizers instead of compost then it is very likely you have a buildup of excess salt. Send a sample to your State Agricultural Extension office.Helpful Reply
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Terry Thomas on Jun 30, 2013@Wanda Forrest look closely. That pipe is part of a chain link fence or gate.Helpful Reply
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Junk Gypsee on Jun 30, 2013My guess is, you're on the north side where it gets a lot of shade? This is normal because the concrete will hold moisture and it comes from the inside, then to the surface. Protect your plants..but get a solution of 50/50 bleach and water and simply put it on the concrete and do nothing except allow it to dry. You may have to do this several times but it works.Helpful Reply
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Laura Gammons on Jul 01, 2013Probably fungus. I have seen it growing in wet mulch. Dig a mini-trench along the sidewalk about 6-8 inches deep & wide & backfill with gravel or sand to drain water away from the area.You can cover that with some landscape fabric then cover it with dirt & mulch. Rock would be a better option instead of mulch. My guess is you don't have a gutter in that area and/or the concrete drains to this area. You could be setting yourself up for termite or rot issues to your foundation.Helpful Reply
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Joan on Jul 02, 2013What Laura suggests sounds like a great option....I noticed that method the other day at my pharmacy's landscaping......don't want any critters devouring your house. I have a fungus in my front yard (gotten from mulch around a tree trunk) Nasty stuff....so I would take Laura's suggestion. Thanks Laura...one smart cookie! :)Helpful Reply
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Meg on Jul 02, 2013looks like run-off of some type due to fertilizer containing lime, salt and/or calcium.Helpful Reply
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Julie Haller on Dec 09, 2014I have city water & that is what my potted plant dirt looks like.Helpful Reply
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Terrie Neudorf on Feb 14, 2015Hard to see if mold or water evaporation . I would remove all effected dirt and replace . If mold the spray with hotwater , vinegar and dawn dish soap only on the effected spot . It will also kill weeds .Helpful Reply
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Jan Munroe on Feb 15, 2015It could be saline from overwatering. Your soil becomes salty and won't grow things. You can sweeten it with "cactus juice" or any surfactant.Helpful Reply
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Cherie Kessel Fisher on Apr 01, 2015put some hydrogen peroxide on the white stuff. If it fizzes, it is a fungus of some sort and you can kill it the rest of the way with peroxide-also, this will not hurt the plants at all. If it doesn't fizz, it is probably a build up of salts, and you can scrape it away and keep it from harming your plants.Helpful Reply
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Jan Munroe on Apr 03, 2015It it is a salt(or soda) it will fizz with peroxide. Not a good test. Peroxide will fizz if you put it on a cut on your hand etc.Helpful Reply
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