Premium Grade Horticultural Pumice 1-7mm 25L

$49.90 inc. GST

Pumice is a light, porous volcanic rock that forms during explosive eruptions. It resembles a sponge because it consists of a network of gas bubbles frozen amidst fragile volcanic glass and minerals. All types of magma (basalt, andesite, dacite, and rhyolite) will form pumice.

Pumice is ideal for growing medium for cacti and succulents. The hardness and porosity allows for drainage, lowering the risk of root diseases The soil beneath the mulch stays moist longer and is less likely to compact from watering.

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During an explosive eruption, volcanic gases dissolved in the liquid portion of magma expand rapidly to create a foam or froth; in the case of pumice, the liquid part of the froth quickly solidifies to glass around the glass bubbles.

Inpro pumice is mined from a land based resource, within 50kms of Lake Taupo in the North Island of New Zealand, and it is characterized by its relative hardness and lightweight in comparison to competing aggregates.