Posted: 29/07/2015 at 20:04
Sharp sand is just sharp sand, no salt. That's not the same as builder's sand which is soft sand (rounded grains) you can feel the difference between the two.
Perhaps I wasn't clear. I know the difference between sharp sand and soft sand but what is the difference between builders sharp sand and horticultural sharp sand? I thought it was the salt content.
I used to think that Hogweed but have never found any salty sharp sand (yes, I have tasted it!) and have been using sharp sand from builder's merchants for decades. I suspect that salt would also affect the ability for concrete to set which is why it doesn't have any. Might be a myth?