Pumice provides the necessary moisture balance of soil with excellent aeration and gas exchange in the root zone, creating an ideal setting for rooting and germination.
Pumice makes an excellent soil conditioner, as it is highly porous, giving it excellent water and air-holding properties. The advantages of using pumice in potting media and garden soils include:
Holds vital nutrients. The porous nature of pumice allows it to hold vital nutrients in the microscopic surface pores, which helps regulate fertilizer feedings.