




Vermiculite
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Vermiculite – moisture-holding mineral for starter mixes
Vermiculite is best understood as a moisture-buffering material. It helps keep small roots evenly supplied with water, especially in propagation trays and delicate tropical blends.
Mixing guide
- Moisture retention: holds water inside the mix
- Fine-root contact: useful for seedlings and cuttings
- Lightweight mineral: easy to blend through soft substrates
- Use sparingly: too much can slow drying
How to blend it
Use it with seeding soil, coco coir or other fine base materials where roots need close contact. It can also help soften mixes that dry too sharply in small pots.
How to use it
A high vermiculite share can make a substrate stay damp for too long. Keep the proportion modest and choose a different mineral for faster dry-down.
How to use Vermiculite
- Moisture retention: Holds water and nutrients in propagation and seed mixes.
- Mixing: Use in small amounts when you want a steadier moisture buffer.
- Role: Works best mixed with coir, soil, or mineral parts.
Prep and handling for Vermiculite
- Dust control: Pre-moisten lightly before mixing to reduce dust in the air.




