Melcourt's potting grit works great both on top and inside of your compost mixes.
Need to some extra drainage for herbs or Mediterranean plants? Add some grit
Have a big cactus that needs re-potting? Add some grit
Fed up of looking at the top layer of bare soil in your pots? Add. Some. Grit.
Essential for any gardener who knows their stuff.
(1-4 mm nominal particle size and washed)