Pumice 4-20mm (Cactus/Succulent/Bonsai)

What is coarse-grade Pumice and what does “4–20mm” mean?

Coarse Pumice is a natural volcanic rock screened to a 4–20mm particle size. This range means you get a mix of chunk sizes in one bag—ideal for boosting airflow, drainage, and structure in potting mixes.

Which plants benefit most from Pumice?

Pumice is perfect for succulents, cacti, bonsai, and other dry-loving or rot-sensitive plants. It’s also useful in raised beds, heavy indoor mixes, or anywhere better drainage is needed.

How is Pumice different from perlite, lava rock, and LECA?

Unlike perlite, pumice is heavier and less likely to float. Compared to lava rock (scoria), it’s lighter and holds some moisture. LECA is spherical and used in hydroponics, while pumice is irregular and soil-friendly.

How much Pumice should I mix into my soil?

Start with 20–50% pumice in your mix for succulents or cacti. You can also blend it with compost, coco coir, or bonsai soil depending on your plant’s needs and local conditions.

Will using Pumice affect how often I need to water?

Yes—since pumice improves drainage, your soil may dry faster, especially in warm or dry environments. Adjust watering frequency and mix ratios to prevent plants from drying out too quickly.

Does Pumice improve root health and prevent rot?

Yes, pumice boosts airflow and creates permanent air pockets that help roots breathe. This reduces the risk of rot, compaction, and issues like fungus gnats in soggy soil.

Can Pumice be used in hydroponics or reused?

Yes—pumice is inert and stable for hydro or semi-hydro setups. To reuse it, rinse off debris and soak in a mild disinfectant if desired. It doesn’t degrade like organic components.

Is Pumice safe and clean to handle?

Pumice is washed and screened, but a quick rinse can reduce residual grit. It’s safe for most users and pets, though gloves help if you have sensitive skin. Avoid rough surfaces—it can scratch.

Can I use Pumice in self-watering pots or as a drainage layer?

You can, but mixing pumice throughout the potting mix often works better than layering. In self-watering pots, aim for a mix that balances drainage with wicking capability.

Why does my Pumice look different or contain larger “rocky” chunks?

Natural pumice varies in texture and color. Larger pieces are normal in coarse grades, but if your product seems off or damaged, contact support with a photo for help.