07/09/2024
*Pumice Stone Available*
Size 2-10mm
Pumice is fascinating stuff, borne out of the superheated earth. It is basically whipped volcanic glass that is made up of tiny air bubbles. This means that pumice is a lightweight volcanic rock that makes it perfect for use as a soil amendment.
The airy rock is ideal for use with cacti and succulents as well as other plants that require excellent drainage and air circulation. Plus, the porosity of pumice allows microbial life to thrive while maintaining soil structure better than perlite. Planting with pumice also has the advantage of a neutral pH along with a variety of trace materials.
There are many advantages to growing plants in pumice. It reduces water runoff and fertilization by increasing soil absorption in sandy soils. It also absorbs excess moisture so roots don’t rot. Additionally, pumice improves aeration and stimulates the growth of mycorrhizae.
Pumice doesn’t decompose or compact over time like other soil amendments, which means it helps to maintain soil structure. It also keeps clay soils loose over time for continued soil health. Pumice is a natural, unprocessed organic product that doesn’t decompose or blow away.
*Using Pumice as a Soil Amendment*
To improve drainage for plants such as succulents, mix 25% pumice with 25% garden soil, 25% compost, and 25% large grain sand. For plants that are prone to rotting, like some euphorbias, amend the soil with 50% pumice, or in lieu of amending the soil, fill the planting hole with pumice so the roots are surrounded by it.