Ho Yoku Black Lava Rock (Scoria) – Bonsai Soil Aggregate for Drainage & Structure

Black Lava Rock (Scoria) for Bonsai – Durable, Natural, and Ready to Use

Commonly known as Scoria, this volcanic stone is a staple in fast-draining bonsai soils. Our Ho Yoku Black Lava Rock is sieved to a consistent size, dust-free, and packaged in resealable pouches for convenience. It improves drainage, supports aeration, and adds long-term structure to your soil mix.

Sourced in the USA and 100% natural—no dyes, no chemicals—this porous, lightweight aggregate is favored by bonsai professionals, succulent growers, and cactus collectors alike.

Red vs. Black Lava: Which Should You Choose?

Functionally, Red and Black Lava (Scoria) offer the same benefits—excellent drainage, aeration, and structure. Your decision usually comes down to color and aesthetic:

• Red Lava is more common in the Northeast due to local sourcing.
• Black Lava provides a darker, more natural look and is especially popular as a top dressing or in mixes where contrast is desired.
• Some growers mix both to achieve a unique look or to help visually gauge water saturation.

Use either—or both—to craft a soil blend that matches your trees and your style.

Key Features

• Also Known As: Scoria – a lightweight volcanic rock
• Ready to Use: Sieved to 1/8"–1/4", dust-free and clean
• Pure & Natural: No dyes, no additives, 100% U.S. sourced
• Excellent Drainage & Aeration: Prevents compaction and root rot
• Long-Lasting Structure: Won’t degrade like organic matter
• Resealable Bag: Keeps soil clean and dry between uses
• Used For: Bonsai soil mixes, succulents, cacti, orchids, hydroponics, and top dressing

Sizes & Wholesale

Available in 2-quart pouches, 18L bags, and bulk Super Sacks.

Need pallets for retail, repotting workshops, or classrooms? Contact us for wholesale pricing—no order is too big.

Enhance your bonsai soil with Ho Yoku Black Lava Rock (Scoria)—a trusted component for professional-grade drainage, structure, and long-term performance.