Fafard Professional Potting Mix Reviews . In addition, they both contain a wetting agent, although it is not specified what the wetting agent is. This item fafard 6400204 professional potting mix, 2 cu. Fafard® Ultra Potting Mix with Extended Feed VAS Agricultural from vasagricultural.com This lightweight formula has been ph adjusted and combines canadian sphagnum peat moss, processed pine bark, vermiculite, and perlite for excellent drainage and great results. Ready to use formula for all planting needs. The perfect formula that will enhance your plants and leave you with excellent results.