Forum home› Problem solving
This Forum will close on Wednesday 27 March, 2024. Please refer to the announcement on the Discussions page for further detail.

Nostoc Help Needed

rasputin.roseaqPozbmnrasputin.roseaqPozbmn Posts: 4
in Problem solving
Last year I saw what I thought was seaweed on my car parking space, which is made up of loose chippings/pebbles. Turns out it is something called Nostoc (witches snot) and no weedkiller will work on it, in fact it thrives on it. I really don't want it spreading to my lawn....goggle gave me lots of lists of things that won't kill it..... any advice on something that will please ..... I'm new on here so apologies if this is a subject already being talked but I couldn't see anything.....

Posts

  • AnniDAnniD Posts: 12,585
    Hello and welcome  :)

    There are a few threads on here, here are links to 2 of them. Hope this helps. 

    https://forum.gardenersworld.com/discussion/comment/2618029#Comment_2618029

    https://forum.gardenersworld.com/discussion/comment/1820793#Comment_1820793
  • Pete.8Pete.8 Posts: 11,340
    I had a patch appear on a shaded part of my fairly new block-paved drive.
    I just put a few pinches of table salt on it and within a few days it was dead.
    That was last summer and it's not (yet) reappeared

    Billericay - Essex

    Knowledge is knowing that a tomato is a fruit.
    Wisdom is not putting it in a fruit salad.
  • floraliesfloralies Posts: 2,718
    We have a lot of it in the winter on our gravel drive, it just disappears when the warmer dryer weather returns, we have never done anything to get rid of it.
  • bédébédé Posts: 3,095
    edited 9 January
    I kill mine on  a flat roof with a spray of THIN bleach.  Thin, because it sprays better.  I bought 15% and thin it to 10%.  It is difficult currently to buy from a supermarket at the usual 5%.

    Take care.

    The spray kills it, but the dead nostoc looks  the same until it dries out, which can take some time in wet weather.  It may come back from spores in the air.
     location: Surrey Hills, England, ex-woodland acidic sand.
    "Have nothing in your garden that you don't know to be useful, or believe to be beautiful."
Sign In or Register to comment.