Pumice is an excellent soil conditioner, as it is highly porous, giving it excellent water and air holding properties. Advantages of using pumice in potting media and garden soils include:
—the porous nature of pumice allows it to hold vital nutrients in the microscopic surface pores, which helps regulate fertilizer feedings. It can even be supercharged with nutrients before it is added to the growing medium.
—excellent conditioner for soils that need increased aeration and drainage, as when growing cacti, bromeliads, succulents, or when rooting cuttings.
—loosens the density of heavy clay garden soils, letting in the air and water plants need. —increases water retention in light and sandy soils.
—makes tillage easier.
—reduces crusting, cracking, flooding and shrink-swelling.
—holds moisture in the soil, reducing watering requirements, yet pumice will not compact or become soggy.
—pumice is inorganic, so it will not decompose or compact over time, meaning it functions continuously and can be recycled and reused.
—pumice is pH neutral.
—pumice does not attract or host fungi, nematodes, or insects.
—pumice makes an excellent component to composts, mitigating volatilization during composting and then contributing in-soil. These advantages can be realized with as little as a 10% addition of pumice to the soil or growing medium.
Pumice Aids Turf Management For the same reasons detailed above, pumice is a high-performance addition to a soil when preparing a quality seed bed for new turf areas. Pumice-enhanced soils can solve issues with native soils being susceptible to compaction or having a poor water and nutrient retaining structure.
Public parks, sports fields and golf courses:
—which receive a lot foot and cart traffic and have extensive water and fertilizer demands to remain attractively green
—benefit greatly from the enhancements imparted by pumice in the soil. In arid regions, the water-retaining porosity of pumice will decrease irrigation demands. Pumice can also be used with existing turf as a top dressing after aerification on heavily-trafficked lawns or greens to restore or maintain proper soil structure.