Sponge Rock (Perlite) There are 4 products.

• 
  Available

  Perlite/Sponge Rock Grade 3- 3 lb. Zip Bag

  -Sponge rock, also known as Perlite, is a common ingredient in orchid mixes. -Sponge rock increases aeration and retains moisture. -It is the volcanic glass that expands when heated and becomes very porous.

  $5.95 Add to cart View
• 
  Available

  Perlite/Sponge Rock Grade 3- 4 cu. ft.

  -Sponge rock, also known as Perlite, is a common ingredient in orchid mixes. -Sponge rock increases aeration and retains moisture. -It is the volcanic glass that expands when heated and becomes very porous.

  $30.00 Add to cart View
• 
  Available

  Perlite/Sponge Rock Grade 4- 3 lb. Zip Bag

  -Sponge rock, also known as Perlite, is a common ingredient in orchid mixes. -Sponge rock increases aeration and retains moisture. -It is the volcanic glass that expands when heated and becomes very porous.

  $5.95 Add to cart View
• 
  Available

  Perlite/Sponge Rock Grade 4- 4 cu. ft.

  -Sponge rock, also known as Perlite, is a common ingredient in orchid mixes. -Sponge rock increases aeration and retains moisture. -It is the volcanic glass that expands when heated and becomes very porous.   NOT ELIGIBLE FOR FREE SHIPPING

  $30.00 Add to cart View