can anyone advise, or tell me the difference between the horticultural grit that I pay premium price for at our garden centre, and the small 1-6 mm decorative gravel available from b&q at a quarter of the price.
The reason I ask is, because Iv'e always believed that the horticultural grit was probably super washed or treat or something like that.
The grit that I buy from the garden centre has to be washed/rinsed by me half a dozen times or so before I get a clean ready to use grit. puzzled???