Where to buy rough grit potting grit?

My wife uses a lot of grit for her sempervivum garden. 
We used to buy the large RHS bags which were 3 for £12 and grey in colour. 
It was the potting grit, not the decorative smooth grit that you top the plant pot with to make it looks nicer. 

Have not seen the rough potting grit for several months. She finds using the topping grit instead in the soil mix is not as effective and the sempervivums are wet and rotting away because of this despite using more and more gravel in the mix. 

Has anyone seen the rougher potting grit around or found a good online source which isn't overpriced?

Posts

  • madpenguinmadpenguin Isle of WightPosts: 1,623
    I use this one for my Sempervivum and succulents.
    Can sometimes be a bit sandy so I rinse it through,but good stuff.
    https://www.marshalls-seeds.co.uk/search-results.html?fq=potting+grit
    “Every day is ordinary, until it isn't.” - Bernard Cornwell-Death of Kings
  • wild edgeswild edges The north west of south east WalesPosts: 3,448
    I like the Melcourt grit. It's basically weathered granite I think and comes in 2 grades which I mix together. The fine grade is great on it's own though.



  • I always found the grit sold for Chickens suitable for either top dressing or including in the soil mix.  Never had a problem with cacti/succulents using this.
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