Close-up of 2–9mm calcined clay—clean, porous structure for root oxygen and moisture regulation in potted plants.
4L Calcined Clay 2–9mm—porous montmorillonite for aeration, drainage, and moisture control in houseplant soil mixes.
8L bag of Calcined Montmorillonite Clay—ideal for cactus, bonsai, and succulent soil structure and root health.
16L Calcined Clay 2–9mm for plants—heat-treated, mineral-rich media for long-term aeration and moisture balance.
25L horticultural calcined clay—used in bonsai, tropical, and succulent mixes to prevent rot and improve drainage.
Montmorillonite clay particles with toonie for scale—shows 2–9mm size for accurate sizing in soil mixes.
Close-up of 2–9mm calcined clay—clean, porous structure for root oxygen and moisture regulation in potted plants.
4L Calcined Clay 2–9mm—porous montmorillonite for aeration, drainage, and moisture control in houseplant soil mixes.
8L bag of Calcined Montmorillonite Clay—ideal for cactus, bonsai, and succulent soil structure and root health.
16L Calcined Clay 2–9mm for plants—heat-treated, mineral-rich media for long-term aeration and moisture balance.
25L horticultural calcined clay—used in bonsai, tropical, and succulent mixes to prevent rot and improve drainage.
Montmorillonite clay particles with toonie for scale—shows 2–9mm size for accurate sizing in soil mixes.

Calcined Clay (2–9mm) Montmorillonite

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Size

Calcined Clay (2–9mm) Montmorillonite

Aeration • Drainage • Moisture Regulation 

This horticultural-grade calcined clay is made from kaolin-rich montmorillonite, heat-treated to create a porous, mineral-rich substrate that enhances soil performance. With excellent aeration and moisture balance, it’s ideal for bonsai, houseplants, succulents, and cacti—or any mix that benefits from structure and long-term drainage.

The 2–9mm (1/8”–3/8”) particle size blends easily into soil or can be applied as a top mulch to reduce evaporation and prevent compaction.

🌿 Benefits

  • Improves drainage and reduces risk of root rot

  • Enhances airflow and oxygen availability to roots

  • Balances moisture with strong absorption and slow release

  • Retains nutrients and improves overall soil fertility

  • Neutral pH supports a stable growing environment

  • Long-lasting and non-compacting—won’t break down over time

  • Helps protect against moisture-related soil diseases

🌱 Best Uses

  • Mix into soil blends for succulents, bonsai, cacti, and houseplants

  • Use as a top mulch to slow evaporation and support microbial activity

  • Add to mineral-rich tropical mixes for structure and drainage

  • Suitable for indoor and outdoor container growing

🧪 Specs

  • Size: 2–9mm (1/8"–3/8")

  • Material: Calcined Montmorillonite Clay

  • Texture: Porous, clean, and long-lasting

  • pH: Neutral

🌿 This product complies with Canadian certified organic crop production standards.