31. Fill the pots with sandy soil or a light potting mix that contains plenty of perlite . 32. A brown potting mix with added perlite will provide good aeration and drainage and discourage disease. 33. Perlite , in case you were wondering, is a heat-expanded mineral like vermiculite.34. A good all purpose soil mixture is 2 parts coir and 1 part perlite or vermiculite. 35. :: Perlite is used to lighten ( improve drainage, aeration etc ) heavy soils. 36. Q . Many of the recommendations I see for soilless mixes call for both perlite and vermiculite. 37. A common 16 cordwood wall for moderate climates comprises of perlite or vermiculite insulation between mortar joints. 38. Use an ordinary commercial potting mix with 1 / 8 to 1 / 4 perlite mixed in. 39. Typical mixes include large-grade drainage material such as perlite , pumice, or ceramic balls. 40. There are important quantities of limestone, gypsum, baryte, perlite , feldspar, granite, etc.
