Horticultural grit is used by the Coastal Succulents, Cacti & Alpines team to add drainage to their succulent compost & to top dress our plants at the Nursery.
We offer 2 x different types that we use as part of our soil mixture and for decorative purposes; a local Somerset quarried Grit & a Cornish Granite Grit - both are equally good from our experience; its just a personal preference to what you prefer if you are using as a top dressing!