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Cat litter

coccinellacoccinella Posts: 1,428
Does anyone use cat litter instead of horticultural grit or perlite for mixing in with compost? I saw this in GW, a man growing cacti that are not watered much. Would it be ok for seeds or indeed in beds? I fear it might clump up and invite cats ... any thoughts?

Luxembourg

Posts

  • DovefromaboveDovefromabove Posts: 88,147
    edited 9 February
    I would imagine that it clumps and then the rootlets wouldn’t get much air around them. Isn’t it usually made of a type of clay? Don’t think I’d try it. 

    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.





  • BenCottoBenCotto Posts: 4,718
    edited 9 February
    Be sure to use non clumping cat litter otherwise you’ll be trying to grow in cement! The problem is cat litter has risen sharply in price over the past 18 months. For a 10 litre bag expect to pay £5 - £8 compared to £8 - £10 for a 10 litre bag of perlite. A bag of horticultural grit is probably the cheapest of the three.
    Rutland, England
  • Beastie29Beastie29 Posts: 55
    Very good for storing dahlia tubers in, over winter, though.  Absorbent, helps draw out excess moisture.  Cheap own-brand stuff will do the trick.  About £2.15 a sack.
  • I would be concerned that cat litter is treated with deodorant and some kind of sterilizer. I am not sure plants would appreciate that.
    You could try crumbling polystyrene packaging, I tried breaking up blocks of packaging to use as drainage in the bottom of large pots but found after a couple of years it compressed and ended up blocking the drainage hole.
  • On top of all that the clay based one is horrible for the environment and we should all move away from it instead of leaning into it for unconventional uses. I've exclusively used wood pulp and corn derived litter for years for my cat...they have all gone up in price significantly over the last two years. 
    To Plant a Garden is to Believe in Tomorrow
  • bédébédé Posts: 3,095
    Certainly don't use 2nd hand cat litter.
     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."
  • bédébédé Posts: 3,095
    Joyce Goldenlily said:

    You could try crumbling polystyrene packaging, I tried breaking up blocks of packaging to use as drainage in the bottom of large pots but found after a couple of years it compressed and ended up blocking the drainage hole.
    I have successfully used broken up garden centre foam PS 6-packs.  They have lasted entire for years.
     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."
  • coccinellacoccinella Posts: 1,428
    I too use chunks of polystyrene at the bottom of pots. Thank you for your comments, I won't go for it I don't think. Grit is not easy to find here and it is heavy to heave from the trolley to the car. Perlite is light but I thought that cat litter was a lot cheaper! I will have a look at the supermarket tomorrow.

    Luxembourg
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