Sponge Rock #3 (perlite)

Sponge rock #3 is a great ingredient for do it yourself orchid potting mixes for seedling and miniature orchids. It adds light weight bulk as well as

What Is Perlite And How Does It Help Your Garden?

Large Sponge Rock A-La-Carte Bag - 2.5 gallons (10 quarts) in a resealable Bag : Soil And Soil Amendments : Patio, Lawn & Garden

Perlite - Sponge Rock (Small)

How to Use Perlite to Improve Soil and Boost Plant Growth – Garden Betty

Vermiculite vs. Perlite: Similarities, Differences, and Which is Better

Sponge rock / Perlite extra coarse - 24 cup bag - Green Barn Orchid and Aroid Supplies

Large Sponge Rock (#4) – Ravenvision Orchid Supplies

Coarse Sponge Rock (perlite) – QuarterAcreOrchids

Perlite, Super Coarse by Grow! It (aka sponge rock) #4 and #8 - OrchidWeb

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Sponge Rock Perlite

Perlite – Roehampton Orchids

Large Sponge Rock - Potting Media - Mini Bag (2 Quarts) : Soil And Soil Amendments : Patio, Lawn & Garden

Large Sponge Rock (#4) – Ravenvision Orchid Supplies

Sponge Rock #3 (perlite) – QuarterAcreOrchids