Thermo-O-Rock 4 cu. ft. Bag Coarse Vermiculite
Thermo-O-Rock 4 cu. ft. Bag Coarse Vermiculite

Thermo-O-Rock 4 cu. ft. Bag Coarse Vermiculite


$68.86 Regular price
  • In stock - departs in 2-3 business days

This lightweight vermiculite provides superb aeration and moisture retention when mixed in with peat, bark, or compost. Also makes excellent fertilizer. Vermiculite soil supports root structure and stimulates fast root growth. Can be used by itself to aid soil-less hydroponic greenhouses.

Lightweight, moisture and nutrient retentive. Good for when higher aeration is required. Increases lateral water movement in growing media.

  • Course
  • 2X - Horticulture Grade
  • OMRI® Listed

Additional Information

Vermiculite Material Safety Data Sheet (PDF)
Vermiculite Asbestos Lab Report Results (PDF)
Vermiculite OMRI Certification Results (PDF)
Vermiculite Food Safety Statement (PDF)

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Customer Reviews

Based on 5 reviews
Alan Smith (Washington, US)
A surprisingly difficult item to find

Few places sell vermiculite for agriculture

Pierce Barney (Phoenix, US)

Product was exactly what we were looking for and for the best price we could find anywhere.

DUANE (Goochland, US)
Coarse vermiculite

I like this vermiculite. Its coarse

Pat Van Buskirk (Denver, US)
Perfect for Square Foot Gardening

Mel's mix in Square Foot Gardening calls for corase vermiculite which is both expensive and hard to find locally. This was perfect and very cost effective. Makes our plants happy!

Raymond DeCastro (DeLand, US)
Good stuff.

Is good stuff.