PlantPumice.
A porous volcanic rock used as a mineral ingredient in growing media.
What it means for your plants
Pumice typically adds more weight than perlite. Its effects depend on grain size and proportion in the blend. Choose horticultural material and control dust during handling.
IN PRACTICE
A heavier mineral amendment can be useful in a mix for a top-heavy plant that needs a stable container.
Put it into practice
Compare perlite and pumice for indoor plants, including weight, water behavior, particle size, and how to choose an amendment.
Perlite vs. pumice: which potting-mix amendment fits?