concrete

I've seen discussion about crushed bricks as a soil additive but I haven't seen the same for concrete. If this is a well trodden path, just point me in the right direction. I know the issue is mainly that water retention is pretty low for high fired bricks, plus there doesn't seem to be the...

Been stusying Bonsai for 4 months now. I have 8 indoor trees and plan on creating bonsai pots of my own, using cement. I see videos on youtube of people making them with molds and wiring. At the end they paint them of course. The inside of the pot as well. I keep wondering what kind of paint...