Orchid Nerd ™ Sponge Rock 1 Cubic Foot Box

Description

Sponge Rock
Sponge rock
, also known by the name Perlite, is a very common ingredient in orchid mixes and for good reason. Sponge rock decreases compaction of mix, increases aeration and retains moisture. Sponge rock is a volcanic glass that expands when heated and becomes very porous.
#3 medium size sponge rock