I received my laterite this week. I’d ordered two different kinds from two seperate suppliers. One is from a large aquarium supplier, and its more like 2-4mm granules covered in a fine dust. The other is pure powder, very very fine. With the quantity I’ve got here, I should be OK for quite a while it seems!
Granular
Powder form
I think most folks use this as 10% of their mix. I’ll try it out soon in a series of experimental plantings. Stay tuned…