Porous Volcanic Soil Amendment for Bonsai, Succulents & Custom Potting Mixes

Create a more open, well-draining growing medium with Soil Sunrise Horticultural Bonsai Pumice Soil Additive. Pumice is a lightweight, porous volcanic material commonly used in bonsai substrates and specialty potting mixes to improve aeration, drainage, and overall soil structure.

Ideal for bonsai trees, succulents, cacti, aroids, tropical plants, container-grown plants, and top dressing, horticultural pumice can be used on its own as a component of specialized substrates or blended with other organic and inorganic ingredients to create a custom growing medium.

Key Benefits:

• Improves Drainage: Porous particles help excess water move through the growing medium.
• Increases Aeration: Creates additional pore space to help maintain airflow around plant roots.
• Porous Structure: Pumice can retain some moisture within its pores while maintaining a loose, granular growing medium.
• Helps Resist Compaction: Durable particles provide lasting structure compared with organic amendments that gradually decompose.
• Versatile Soil Amendment: Suitable for bonsai, succulents, cacti, aroids, tropical plants, and other container-grown plants.
  

What Is Horticultural Pumice?

Pumice is a naturally occurring volcanic rock formed when gas-rich lava cools rapidly, creating a lightweight material filled with tiny pores. Unlike bark, rice hulls, and other organic soil components, pumice does not readily decompose, making it particularly useful in long-lasting bonsai and specialty potting mixes

In horticulture, these porous particles are valued for their ability to provide drainage, aeration, moisture-holding capacity, and structural stability within growing media. Pumice helps create a granular growing medium with open spaces between particles for airflow and water movement. Its porous surface can also retain some moisture, allowing it to contribute to a balance between drainage and moisture availability

How to Use Horticultural Pumice:

Bonsai Soil:
Use as one component of a custom bonsai substrate. Blend with other inorganic or organic ingredients according to the needs of your tree.

Succulents & Cacti:
Mix with potting media to increase drainage, aeration, and granular structure.

Aroids & Tropical Plants:
Combine with bark, coco coir, perlite, charcoal, or other ingredients to add porosity to chunky potting mixes.

Container Plants:
Incorporate into potting soil when additional drainage and structure are desired.

Custom Soil Blends:
Combine with calcined clay, bark, perlite, coco coir, peat moss, or other growing-media ingredients to create a plant-specific substrate.

How Much Horticultural Pumice Do I Need?

Choose the bag size that best fits your potting or repotting projects. The actual amount needed will vary depending on container size, portion used, and how much growing media is needed for each plant.

2 qt: Individual bonsai, succulents, small containers, or trial mixes.
4 qt: Multiple plants, bonsai repotting projects, or custom soil blending.

Why Choose Soil Sunrise Horticultural Pumice?

Soil Sunrise Horticultural Bonsai Pumice Soil Additive provides a durable inorganic ingredient for growers who want greater control over the drainage, aeration, and structure of their growing media. Whether you're building a bonsai substrate, creating a fast-draining succulent mix, or adding porosity to a custom houseplant soil, pumice offers a versatile granular component that can be adapted to a wide range of plants and growing conditions. 

bonsai trees, succulents, cacti, aroids, tropical plants, container plants, top dressing, and custom potting mixes.

100% Horticultural Pumice
Made in the USA
  

Note: Individual plant results may vary based on plant species, watering, light, temperature, container type, growing medium, and other growing conditions.