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Premium OMRI listed horticultural pumice bulk box for soil mixing

OMRI Horticultural Pumice

Price range: $25.00 through $40.00

Our OMRI Listed Horticultural Pumice is considered a superior gardening amendment due to its highly porous, lightweight volcanic structure, which provides unmatched soil aeration, excellent drainage, and moisture regulation without breaking down. Unlike perlite, it does not float to the surface, and it is more durable and water-retentive than lava rock. 
Key benefits of pumice for gardening include:
  • Superior Aeration & Drainage: Its porous, air-filled structure prevents soil compaction, ensuring roots get enough oxygen while preventing waterlogged roots that lead to rot.
  • Moisture & Nutrient Retention: It acts like a microscopic sponge, holding onto water and nutrients and releasing them slowly, which can reduce watering needs.
  • Structural Stability: It does not break down, decompose, or degrade, providing long-lasting soil structure for years.
  • Prevents Compaction: Unlike other materials that may degrade over time, its light, rigid nature prevents heavy soils from compacting.
  • Ideal for Succulents & Cacti: It is highly recommended for succulents , bonsai and cacti because it provides the perfect balance of drainage and moisture retention.
  • Ideal for improving heavy clay soils: in Oklahoma , Texas , New Mexico , Arizona.
  • Neutral pH: It does not affect the pH level of the soil.
  • Functional Mulch: It makes a great top-layer mulch, as it is heavy enough not to blow away, manages soil temperature, and keeps the surface dry, which can help control gnats. 
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Description

Our premium Horticultural Pumice Bulk Box is the premier choice for organic farming, Bonsai training, and cactus collections. Sourced from premium volcanic deposits in NM and CA, this 100% natural stone provides permanent aeration that never fails. It is the ultimate soil amendment for indoor grow tents, raised beds, and commercial fruit production. Whether you are building a living soil mix in Oklahoma or prepping a garden in Texas, our pumice ensures roots thrive.

This natural volcanic rock is far superior to standard perlite because it does not float, shatter, or crush over time. This makes a Horticultural Pumice Bulk Box a permanent, long-lasting solution for all of your soil structure and drainage needs.

Premium Growing Benefits of a Horticultural Pumice Bulk Box

  • Universal Soil Use: Perfect for Cacti, rare succulents, Bonsai trees, and organic garden vegetables.
  • Permanent Root Aeration: Unlike perlite, our premium rock media never breaks down, decomposes, or floats to the top.
  • Organic Certified: This aggregate is 100% OMRI Listed for certified organic production and clean agriculture.
  • Nutrient Retention: Holds moisture and vital nutrients inside thousands of microscopic surface pores.
  • Retail Box Sizes: Fast shipping directly to your door in versatile 4qt, 8qt, 12qt, 20qt, and 50qt sizes.

How to Use Your Horticultural Pumice Bulk Box for Maximum Drainage

For most succulents and desert cacti, we highly recommend mixing a ratio of 60% pumice and 40% organic potting soil. For specialized Bonsai training, we recommend a balanced blend of 33% pumice, 33% organic soil, and 33% Akadama for maximum water drainage and precise root control. This high-performance product ensures the highest safety standards for your food crops and hobby plants alike.

Because it is a natural volcanic glass, it provides a unique grit that discourages soil pests while maintaining a perfectly neutral pH for your delicate root systems. You can view our other cactus supplies and live plants here on our main shop page.

Looking for larger commercial quantities?

We offer local 14-yard trailer and 80-yard semi-truck loads for large-scale agricultural projects across the region.

INQUIRE ABOUT BULK DELIVERY

Additional information

Weight N/A
Box Size

5 Quarts, 20 Quarts

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