Large Sponge Rock index-orchid-pot Large lava rock is used

Large lava rock is used in vanda baskets and with other large media in mixes

this large 12" pot weighs a little over 1 pound

We make this mix with Coir which is ground coconut husk and the absence of peat is key to getting rid of fungus gnats

Angraecum sesquipedale

When BTI is eaten by these larvae toxins are released into their gut which causes the larvae to stop eating

Large Sponge Rock index-orchid-pot Large lava rock is usedSponge 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. Large sponge rock, #4, is best combined with other large chunk media.