Specialty Gardening: Container Soils and Water Movement in Containers (long post), 1 by tapla

tapla wrote:
I use pelletized dolomitic lime. I use crushed granite (turkey grit) extensively in my soils for woody plants, but find it unnecessary in short term soils (display or veggie plantings) where perlite is much less expensive & entirely adequate.

This year, I'm experimenting with gypsum as a Ca source & will occasionally use Epsom salts for Mg.

Turface on left, crushed granite on right. Disregard soil. It's from my raised beds and would hold too much water to be suitable for use in containers.

Al