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fertilizer available exclusively from rePotme
I use 1 tsp
Small Sponge Rock - Perlite
Augustine Orchid Society
If the orchid mix pH is too high
Large Sponge Rock Size:Mini Bag fertilizer available exclusively from rePotmeSponge 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.
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