Outdoor Moss & Mold : how do I kill it

Forums › Home Workshop DIY › Outdoor Moss & Mold : how do I kill it

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# 175298 24-Jun-2015 11:58

Moss & Mold on the driveway & concrete area surrounding the house . How do I kill it ?

Ive tried Wet & Forget: didnt work
Janola : 1:4 mix (same as some commercial products) : didnt work (but has to some extent in the past)
Hitman (weedkiller) Ive had some partial success with that, not the best choice Im sure

Any ideas or recommendations ?
It does all die off in summer , so its really not a huge issue, I just dont like the look of it.

richms

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# 1330559 24-Jun-2015 11:59

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Its probably died but just still there because you need to either waterblast or scrub it off. Killing it just makes it stop growing, the black crap wont disappear.

Richard rich.ms

kiwitrc

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# 1330570 24-Jun-2015 12:06

Try Bio Shield

wellygary

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# 1330592 24-Jun-2015 12:16

Roundup...... kills most green things it touches

Handsomedan

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# 1330610 24-Jun-2015 12:29

Spray...walk away.

Then waterblast.

Handsome Dan Has Spoken.

ubernoob

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# 1330619 24-Jun-2015 12:34

We use Mostox at work on paths and wooden decks. Works well, but as stated above, most this stuff kills the moss but doesn't remove it. We now have nice yellow brown moss, not green. It does eventually deteriorate and disappear but takes months not days

scuwp

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# 1330620 24-Jun-2015 12:35

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Wet and forget et al take weeks sometimes months to work. How long did you wait before determining they didn't work? If you want instant clean, get a water blaster.

Always be yourself, unless you can be Batman, then always be the Batman

BTR

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# 1330691 24-Jun-2015 13:36

30 seconds, spray and walk away!

Note I haven't used this product before.

richms

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# 1330786 24-Jun-2015 15:56

BTR: 30 seconds, spray and walk away!

Note I haven't used this product before.

Clearly not or you would know it is pretty much ineffective ;)

Richard rich.ms

SepticSceptic

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# 1330792 24-Jun-2015 16:11

Is it that revolting globular rock snot that piles up in icky drifts ?

An algaecide or moss killer will work -

Glyco will not - wrong plant group.

Undiluted bleach kills it. Eventually, with an added bonus you can see the bits you have missed in about 5 minutes as it bleaches. I go thru about 10 litres every year. But it always comes back - any spores left around will dry and disintegrate into a thousand more spores waiting for winter rains to revive it, and multiply. Car tyres and shoes spread it around.

I suspect that it is an escaped bio-nonhazard, designed to really really annoy people

Good drainage seems to work as it seems to multiply in flat and pooled water areas.

My thoughts are no longer my own and is probably representative of our media-controlled government

bfginger

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# 1331005 24-Jun-2015 22:13

Kettle and boiling water. Just don't kill your feet too.

kiwitrc

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# 1331087 25-Jun-2015 06:23

A good Moss killer for lawns is Magnesium Oxide which is available from places that do farm/horse supplies such as PGG/Farmlands etc. It doesnt stain concrete like Iron Oxide so should work fine on your drive. I use it on the lawn and it kills moss well, plus you dont need to rake the moss out like. Its a powder so you just throw it on. I intend to see if I can mix it with water and spray it.

qwertee

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# 1331099 25-Jun-2015 07:53

I use McGregor's Moss Control fom Bunnings on the concrete pathway and drive.

It takes a few weeks for the fresh colour of the green to to turn dark brown/grey.

I dont bother with scraping them off, they just loosen up and the rain carries it away.

You might want a repeat treatment for areas that that are a bit stubborn or you might have missed.

cheers

BTR

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# 1331102 25-Jun-2015 07:59

Napalm!