Grade 3 Medium Vermiculite – 100L Bag Medium vermiculite offers excellent aeration and water retention. It works particularly well as an additive for sandy soils, improves aeration in clay soils, and can be used as a surface layer to help retain moisture when raising seeds. Note: Grade 3 Medium Vermiculite 100L bags are available by quote only due to their bulk, requiring specialised freight arrangements. Uses and Benefits Soil Conditioner: Heavy Soil: Mix up to 50% vermiculite with heavy soils to create channels that improve aeration, encouraging healthier root development. Sandy Soil: Incorporating vermiculite helps sandy soils retain water and air, essential for robust plant growth. Seed Germination & Cutting Propagation: Provides ideal conditions for starting seeds and propagating cuttings. Hydroponic Growing Media: Exfoliated vermiculite is an excellent hydroponic medium, supporting moisture and nutrient retention for optimal plant growth. Product Features Processed for Quality: Heated and expanded to form lightweight, accordion-shaped pellets with multiple thin layers. Durable & Reliable: Vermiculite is long-lasting, sterile, odorless, non-toxic, and resistant to rotting, mould, or deterioration.