Our system is different to PB system first,
I’v seen many PB Jobs and he use different way to make it.
basicly, 2 layers of its felt and a kind of black root barrier material stapples all together. but seperatly !
layers by layers. i have a picture somewhere of its layers ..i’ll try to find it.
the planting in between the two felts.
spray fertilizer will not be effective as a low emmision injector.
