terra cotta

My understanding is that a colander can be used for pine trees in an effort to make the roots compact and fiberous enough for placement in a bonsai pot. Any roots that are near the surface of the colander will dry out and die back creating a dense root ball. Doesn't terra cotta do a very...

I have been experimenting with terra cotta lately. I have performed numerous tests using varying dry/wet filtration methods relying mostly on particulate sizes and impurity concentrations of clay from different areas.