Diatomaceous Earth - Coarse Fines 1/16"

Diatomaceous Earth (1/16″ Particle) – Horticultural Grade

Our Horticultural Diatomaceous Earth is a finely screened, ~1/16″ particle size mineral aggregate designed specifically for bonsai, container plants, and specialty soil blends. Unlike powdery DE, this granular grade provides excellent drainage, aeration, and moisture regulation while remaining stable over time.

This material is ideal for growers looking to improve root health, reduce compaction, and create highly controlled soil environments.

Key Benefits 

Improves Drainage & Oxygen Flow
The rigid, porous structure prevents soil compaction and promotes healthy oxygen exchange at the root zone—critical for bonsai and shallow containers.

Moisture Retention Without Water-logging
Each particle absorbs and slowly releases moisture, helping maintain even hydration while avoiding soggy conditions.

Root-Friendly Structure
Angular yet lightweight particles encourage fine root development and reduce the risk of root rot.

Long-Lasting & Inert
Unlike organic components, diatomaceous earth does not break down quickly, keeping your soil structure consistent over time.

Excellent Soil Additive
Works well as a component in custom bonsai mixes, tropical plant substrates, cactus & succulent blends, and container gardening soils.

Neutral & Non-Fertilizing
Does not alter nutrient balance, making it easy to pair with controlled fertilization programs.

Common Uses

• Bonsai soil blends (mame, shohin, and larger trees)

• Tropical and houseplant substrates

• Cactus & succulent mixes

• Rooting and repotting applications

• Soil aeration for compacted container media

Particle Size

• Approx. 1/16″ (≈1.5 mm)

• Screened to remove excessive dust