Harticultural  Pumice

Star-ltd Horticultural Pumice is a natural lightweight volcanic pumice soil amendment. The pumice is chemically inert, high-silica rock with a neutral pH, and contains millions of interconnecting spherical voids. This porosity give Star-ltd Horticultural Pumice  an extremely high capacity for water absorption, an equally high rate of water retention, and the ability to release moisture back to the plant. The high-silica content gives Star-ltd Horticultural Pumice durability which eliminates the need for reapplication when recycling your potting mix: 

  • Horticultural pumice improves porosity and aeration.
  • Optimizes absorption, retention, and exudation.
  • Absorbs moisture, air and nutrients to promote root growth.
  • Lightens heavy soils and increases retention in light and sandy soils.
  • Functions continuously and permanently, will not break down by cultivation.
  • Regulates feeding by prolonging the availability of any given amount of fertilizer.
  • Retains neutralizers to more permanently rectify acid or alkaline soil conditions.
  • Realizes advantages with as little as 10% addition.
  • Enhances drought tolerance.
  • Ideal for Hydroponics



Pumice grades supplied for horticultural uses include:

  • 0-4mm
  • 0-8mm
  • 4-10mm
  • 0-16mm
  • 7-20mm
  • 20-40mm
  • 30-50mm
  • 50-70mm