Gritty mix is : 1 1 1 ( 1 part each of turface, granite grit and bark fines) can add gypsum. I find its good for succulents/cati
5 1 1 is 5 parts bark fines, 1 part peat, 1 part perlite ( add 1 TBS lime per gallon of mix. I use a modified use with some turface and DE added in.
Bark fines should be 3/8" to 1/4" , you should screen for optimum size. I am using pumice in place of granite for more moisture/fert-nutrient retention-less weight for veggies/herbs. I use fir bark at smaller size for smaller pots, larger size for larger pots.
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