I am making a list of mediums that I can use to make soil more loose and improve airiness.
Soil will be used primarily in pots. I am interested in both home made mediums and commercially available, but more in the home made ones.
Currently on the list: 1. coir 2. forest soil
What other mediums can be used?
UPDATE: I use garden soil for pots (and so far had zero diseases and pests), but I need to mix it with something to keep it loose over a long time.
What about straw? Is it okay to add it to soil?