Uni-Gro Pumice
Best soil amendment for gardeners seeking improved aeration and root health.
Enhance your soil with Uni-Gro® Pumice, a naturally porous volcanic additive. This 1 cubic foot bag is designed to significantly improve both water retention and aeration when mixed with potting soil, creating an ideal environment for root development. It also proves highly effective for aiding seed germination and cultivating delicate plant cuttings. Incorporating this pumice into your growing medium promotes better plant performance and vitality.
$17.95
Owner Satisfaction
4.7
/ 5
Category Rank
11
/ 1247
#11 in Soil
Price vs Category Average
-65%
Below average
Volume
1.0
/ cubic feet
Who it's for
- Indoor gardeners protecting sensitive roots from rot
- Busy plant owners needing consistent moisture levels
- Long-term growers wanting permanent soil structure
Who should skip it
- Gardeners managing heavy hanging baskets or large pots
- Convenience seekers avoiding extra prep work
- Budget-conscious hobbyists looking for inexpensive amendments
Performance breakdown
Root Aeration
Volcanic porosity creates essential airflow for vigorous root system development.
Moisture Regulation
Balances water retention and drainage to prevent harmful soil compaction.
Propagation Support
Ideal texture for delicate cuttings and sensitive seed germination environments.
Soil Structure
Coarse volcanic particles provide necessary physical stability for potting mixes.
Sustainability
Responsibly sourced material appeals to the environmentally conscious home gardener.
Mixing Versatility
Integrates seamlessly into standard potting soils for immediate performance gains.
Key Specs
Volume
1.0 cubic feet
Origin
Volcanic
Intended Use
Potting, Seed Starting
Soil Type
Potting Mix
Drainage Level
Moderate Draining
Moisture Retention Level
High
Texture
Coarse
Primary Amendment
Perlite
Features
- Naturally porous volcanic material
- Improves soil aeration for healthy roots
- Enhances water retention capabilities
- Supports successful seed germination
- Aids in cultivating plant cuttings
- Sustainable sourcing for eco-conscious growers
What customers say
The Uni Gro Pumice earns high marks primarily for its superior quality and effectiveness in improving soil structure. Consumers consistently note that the product arrives remarkably clean, featuring minimal dust or fine particles, which is a significant advantage over competing soil amendments. This cleanliness makes it exceptionally easy to use straight from the bag. Plant enthusiasts trust this pumice for reliable drainage and aeration, ensuring healthier root environments for sensitive plants like succulents and bonsai.
Know before you buy
Pumice improves the physical structure of your soil by increasing aeration and drainage. This helps prevent soil compaction, allowing roots to breathe and grow more effectively.
While both improve aeration, pumice is a heavier, more durable volcanic rock that doesn't float to the surface as easily as perlite. It also provides better moisture retention, making it a great choice for plants that need consistent hydration without waterlogged roots.
Yes, its porous nature makes it excellent for seed starting and rooting cuttings. It provides a stable, well-draining medium that encourages delicate root systems to develop without the risk of rot.
A common starting point is to mix one part pumice to three parts potting soil. You can adjust this ratio based on your specific plant's needs, using more pumice for succulents or cacti that require faster drainage.
No, this product does not contain any weed-preventative properties. It is strictly a soil amendment designed to improve the physical properties of your growing medium.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$18