Earthcore Pure Icelandic Pumice 10 lb (8.5 qt) — Lightweight, Porous Potting Amendment for Drainage & Root Aeration

Earthcore Pure Icelandic Pumice is a 100% natural, highly porous volcanic rock from Mt. Hekla designed to improve drainage, aeration, and nutrient retention in potting mixes and garden beds.

Harvested from Iceland’s Mt. Hekla, this 10-pound (8.5 quart) bag of pumice is a mineral-only soil amendment that supports healthier root systems without adding organic material or chemical residues. Its lightweight, irregular particles hold moisture while preserving oxygen spaces, creating a balanced environment for seedlings, succulents, houseplants, and outdoor crops. Because it’s inert and long-lasting, pumice won’t break down or compact over time—making it a repeatable addition to potting mixes and raised beds.

How does this pumice improve drainage without drying out plants?

The volcanic structure of pumice contains millions of tiny air pockets that create channels for water to flow while storing enough moisture on particle surfaces. That balance prevents waterlogging around roots yet supplies accessible water between waterings, reducing stress from both overwatering and drought.

• High porosity promotes rapid drainage of excess water.
• Surface micropores retain moisture available to roots.
• Maintains oxygenated pore space for healthy root respiration.
• Ideal particle size for mixing into potting soil or top-dressing.

Will Earthcore pumice help my plants get stronger roots?

Yes. By keeping soil structure open and aerated, pumice encourages roots to explore and expand rather than circling or suffocating. Roots in pumice-amended mixes tend to develop thicker, more fibrous growth that supports nutrient uptake and plant stability.

• Prevents compaction that restricts root growth.
• Encourages deeper and more extensive root systems.
• Supports beneficial microbes that aid nutrient cycling.
• Works well for seedlings, repotting, and mature plants.

How should I use this pumice for different plants or beds?

Mix ratios vary by plant type: for succulents and cacti, blend pumice into potting soil at 30–50% by volume; for general houseplants, 10–25% improves structure; for raised beds and outdoor soils, incorporate 10–20% to improve long-term aeration and drainage. Use as a top-dress or soil amendment depending on your goals.

• Succulents/cacti: 30–50% pumice for fast-draining mix.
• Houseplants: 10–25% to reduce water retention without drying out roots.
• Raised beds/outdoors: 10–20% to improve texture and nutrient holding.
• Top-dress: sprinkle 0.5–1 in layer to reduce crusting and evaporation.

Is this pumice safe and sustainable for long-term garden use?

Earthcore’s pumice is a mineral product with no organic contaminants, fertilizers, or additives—so it won’t alter soil pH or introduce unwanted organisms. Because pumice is essentially permanent in the soil, a single application provides long-lasting benefits without frequent replacement.

• 100% natural volcanic rock with no additives.
• Inert and does not change soil chemistry.
• Long-lasting; does not decompose like bark or peat.
• Resealable heavy-duty bag for storage and reuse.

Who is this for: Earthcore Pure Icelandic Pumice is aimed at home gardeners, indoor plant enthusiasts, succulent collectors, greenhouse growers, and landscapers who want a stable, clean soil amendment that improves drainage, aeration, and nutrient retention. If you repot frequently, manage mixed container displays, or maintain raised beds, this pumice provides a durable, maintenance-friendly way to support stronger, healthier root systems without changing soil chemistry.