Thank you for pointing me to CEC. After learning about it, I have a much better grasp on the situation :) Mix: 12.5% Red Scoria, 50% Pumice, 6.25% Decomposed Granite, 6.25% Zeolite | 15-25% Compost, 0-10% Worm Castings, (add Coir to non-cacti) (some of my earlier mixes were closer to 18.75% per inor...

Hi, I've recently started using the liquid fert in reverse osmosis water. All my cacti are clay-potted in 75% inorganic/25% sieved compost/castings. Humidity swings wide in Central Texas, and this works for me to prevent rot throughout the year. In the case of 100 degrees Spring/Summer the soil drie...