Pumice for Soil Aeration

Pumice is created when super-heated, highly pressurized rock is violently ejected from a volcano. It is commonly used as an aeration amendment in soils. We prefer it to perlite because it doesn't break down as quickly and is heavier, so it is less likely to float to the surface over time from repeated watering.

Sizes & Ordering

• Cubic foot bags: The pumice we stock is medium.
• Yard or pallet quantities: Available in fine, medium or large sizes. Call KIS Organics at (425) 558-0990 to order.

How We Use It

In our soils, we use pumice at a rate of 33-37% of our total media, as a combination of 1/3 large pumice and 2/3 medium pumice. Our pumice is sourced from Oregon.