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Propagation Grade Pumice, Triple Screened Volcanic Pumice 1/8–1/64 Inch, Seed Starting Soil Amendment, Cutting Propagation Substrate

Propagation Grade Pumice, Triple Screened Volcanic Pumice 1/8–1/64 Inch, Seed Starting Soil Amendment, Cutting Propagation Substrate

$69.00
$69.00
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Shipping calculated at checkout.

Give seeds and cuttings a carefully screened mineral ingredient with our Propagation Grade Pumice. This triple-screened Oregon volcanic pumice has a particle size of approximately 1/8 to 1/64 inch and is processed to remove about 90% of the fines found in our single-screened product.

It is ideal for adding to seed-starting mixes and cutting-propagation blends.

Why Choose Triple-Screened Pumice?

  • Particle size: 1/8–1/64 inch

  • Processing: Triple screened

  • Fines reduction: About 90% fewer fines than the single-screened product

  • Oversized particles: Hand screened to remove pumice larger than 1/8 inch

  • Origin: Natural volcanic pumice from the Southern Cascades Mountains of Oregon

  • Quality: Clean pumice with no rocks, roots, or other debris

Suggested Use

Add approximately 15%–30% pumice to a peat/perlite-based mix for seed starting or cutting propagation.

This pumice can be incorporated into your own propagation blend according to your preferred recipe.

Available Package Sizes

Choose from:

  • 15 oz

  • 10 cups

  • 5 quarts

  • 3 gallons

  • 6 gallons

  • 12 gallons

Container Fill Conversions

Package size Trade-gallon capacity
10 cups 1⅓ gallons
5 quarts 2.5 gallons
3 gallons 6 gallons
6 gallons 12 gallons
12 gallons 24 gallons

These conversions help estimate how many trade-gallon containers each package can fill.

Shipping Information

Shipping is included in the price.

  • 15 oz: First-Class Mail

  • 10 cups, 5 quarts, and 3 gallons: Priority Mail

  • 6 and 12 gallons: UPS

Natural Volcanic Pumice

Pumice is sometimes called the "rock that floats" because its natural volcanic structure contains many tiny gaps and air pockets.

Our pumice is mined in Oregon's Southern Cascades Mountains and hand packed in bags with reusable ties for convenient storage.

Handling & Storage

If the pumice dries before use, lightly moisten it to help prevent dust from forming. Avoid inhaling dust from rock or potting soil products. Dust may irritate people with sensitive lungs.

Thank you for choosing our specialty nursery products!

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