Premium Bonsai Soil Additives – Pumice, Red Lava, Black Lava & Akadama (18L Bags)

Pumice, Red & Black Lava, Akadama (18 Liter Bags)

Whether you're crafting a custom bonsai mix or just want to improve your succulents' health, these additives give your soil a major performance boost. From moisture retention to aeration and durability, each one brings its own strengths to the mix—so your plants thrive, season after season.

Horticultural Pumice in 3/8"–1/4" Size; A Root-Friendly Powerhouse

This 100% natural volcanic pumice is one of the best upgrades you can make to any bonsai, cactus, or succulent setup. No dyes. No chemicals. Just pure, porous goodness mined right here in the USA.

Drainage and moisture? You get both

Pumice strikes that rare balance—holding enough water to keep roots hydrated while letting excess moisture drain away freely. That means healthier roots and fewer worries about overwatering.

• Natural air flow: Promotes strong root development by increasing oxygen circulation

• Moisture retention: Keeps your plants hydrated longer, without soggy soil

• Clean and ready to use: Sifted to remove dust, fines, and debris

• Perfect particle size: 3/8"–1/4" range for consistent mixing

I’ve added this to my own bonsai mix and immediately noticed better water distribution and less compacting—especially helpful during warm spells.

Red Lava Rock – Light, Porous, Long-Lasting (1/4" in Size)

Our Red Lava Rock is more than just pretty—it’s a functional soil additive that improves drainage, resists compaction, and enhances airflow to plant roots. It’s the same stuff used in professional bonsai mixes, including the renowned “Boon Mix.”

Stable and sustainable

Unlike some additives that break down over time, Red Lava keeps its shape and performance for years. That means less repotting and more reliable care.

• No artificial color or chemicals: All-natural volcanic origin

• Great for succulents and bonsai: Enhances both drainage and structure

• Dust-free and sifted: Ready to use right out of the bag

Akadama in Standard Size (3-5MM) – Bonsai Gold, Straight from Japan 

Akadama is the go-to soil component for Japanese bonsai professionals—and for good reason. Mined from volcanic soil in Japan and carefully sifted to perfection, it offers unrivaled moisture regulation and root health.

Built-in watering indicator

One of my favorite features? Akadama darkens when wet. It’s a simple but effective way to know when it’s time to water—especially handy for beginners.

• Supports healthy root development: Holds moisture but drains well

• Great for conifers, maples, and more

Unlike some bulk Akadama that’s packed with fines and dust, this batch arrives clean and consistent—no clogging, no mess.

Black Lava Rock in 1/4" Size – Sleek, Sturdy, Soil-Boosting

With the same long-term benefits as Red Lava but a deeper, darker tone, Black Lava Rock is another top-tier soil amendment for bonsai, cacti, and succulents. It helps roots breathe, prevents soil compaction, and retains just the right amount of moisture.

Professional-grade mix, beginner ease

Ready to use, it adds a bold visual punch and serious performance to any soil blend.

• Porous and lightweight: Improves aeration without weighing down your pot

• Doesn’t break down: Keeps your mix stable over time

• Clean and natural: No dyes, no artificial chemicals

• Multiple sizes available: To suit your plant’s specific needs