Wigert's Bonsai Nursery Pumice

Japanese pumice is generally harder and more durable than many domestic varieties, meaning it resists breaking down into dust over time. This structural integrity is crucial for maintaining consistent drainage and aeration within your bonsai pot over several years.

While it can be used alone for certain species, it is most effective when blended. Most growers mix it with akadama or other organic components to create a balanced soil mix that retains the right amount of moisture while still providing the drainage necessary for healthy root systems.

With particles ranging from 1/2 inch to 3/4 inch, this grade is ideal for the bottom drainage layer of your bonsai pots or for mixing into soil for larger, established trees. It may be too coarse for very small shohin bonsai or seedlings.

It is good practice to rinse the pumice before use. While it is a high-quality, natural product, shipping can cause some friction, resulting in fine dust that can clog your drainage holes if not washed away first.

Yes, it is an excellent choice for conifers like pines and junipers. These species thrive in well-draining, highly aerated soil, and the pumice helps prevent the root rot that can occur if the substrate stays too wet.