3 Gallon Horticultural Pumice, 3/8–1/16 Inch Volcanic Rock, Bonsai Soil Amendment, Cactus and Succulent Mix, Natural Oregon Pumice

Improve your custom soil blends with natural horticultural-grade pumice from the Southern Cascades Mountains of Oregon. This 3-gallon package contains a blend of volcanic pumice particles in varying sizes, making it a versatile mineral ingredient for bonsai soil, cactus and succulent mixes, containers, raised beds, and specialty horticultural applications.

Known as the "rock that floats," pumice is a naturally porous volcanic material with many tiny air pockets. Our pumice is clean, hand-packed, and free of rocks, roots, and other debris.

Product Details

• Product: Horticultural-grade natural pumice

• Package size: 3 gallons

• Particle size: Approximately 3/8–1/16 inch, with some fines

• Source: Southern Cascades Mountains, Oregon

• Material: Natural volcanic pumice

• Contents: Clean pumice without rocks, roots, or other debris

• Packaging: Hand-packed bag with reusable tie

• Shipping: Price includes shipping

Suggested Soil Mix Applications

Use pumice to customize soil blends for different plants and growing applications.

General Horticultural Mix – 15% Pumice

For general horticultural applications, mix approximately 15% pumice into your soil blend. Suggested uses include:

• Japanese maple soil mixes

• Raised garden beds

• Container gardening

• General-purpose horticultural blends

Water-Sensitive Plants – 30% Pumice

For plants that are sensitive to overly wet soil, the seller recommends incorporating approximately 30% pumice into the mix.

Examples include:

• Gunnera

• Giant Sequoia

• Sophora

• Daphne

• Monkey Puzzle trees

• Franklin trees

Cactus and Succulent Mix – 60–80% Pumice

For cactus and succulent growing mixes, use approximately:

• 60–80% pumice

• 20–40% organic matter

Adjust the proportions according to the plant species, container, and growing conditions.

Bonsai Soil Mix

For a custom bonsai substrate, the seller recommends combining equal parts:

• Pumice

• Coarse compost

• Bark

• Black lava rock or coarse sand

Natural Volcanic Pumice

Pumice is naturally porous and varies in shape and size. This product contains a blend of particles from approximately 3/8 inch down to 1/16 inch, along with some finer material.

Because it is a natural mined product, particle sizes and appearance may vary slightly.

Packaging and Storage

Our pumice is hand-packed in a bag with a reusable tie for convenient storage after opening.

If the pumice becomes dry before use, lightly moisten it to help prevent dust from forming.

Dust safety: Avoid inhaling dust from pumice, rock, or potting soil products. Airborne dust can irritate the lungs, particularly for people with sensitive respiratory systems.

Shipping Information

• Package size: 3 gallons

• Shipping: Price includes shipping

Scenic Hill Farm is a licensed Oregon nursery.

Please note that this is a natural mineral soil ingredient, not a complete potting mix. Combine it with other appropriate ingredients for your specific plants and growing application.