Vermiculite, pearlite, bloodmeal, bonemeal, superphosphate, silica gel, sphagnum moss, course sand ...
My daughter has been buying tropical plants all summer and I am going to help her blend her own custom potting mixes for the various genera she wants to keep over winter.
Many succulents, but some bromeliads and typical house plants, too. She is learning so much, so fast.
I have not really talked about this, but my daughter has populated the house placing oxygen generating plants into damn near every nook.