Since folk are quite interested in all this I have managed to obtain a 2-6mm chipping which is what the merchant classify it as. I bought this for £50 inclusive of VAT for 1 ton. In other places the same is £60-80 so I felt for a ton it was a good multipurpose chipping deal. I intend using this inside the potting medium and on the top of the pots. I thought it would be okay for planting in and even mulching if need be. Seems ideal to me!
Thanks for the advice it all so helpful!!
Grit, granite, gritty or chippy my head is nearly spinning! HO HO!
Be careful with the teeth David and thanks for your advice.
