Sinclair Vermiculite Fine 100 Litre

Sinclair Vermiculite Fine 100 Litre is a lightweight, expanded mineral amendment designed to transform the way you grow in pots, raised beds, and seed trays. Its laminar structure delivers excellent cation exchange properties, helping compost and potting mixes hold onto soluble nutrients while enhancing moisture management. That means your plants get steady access to nutrients with less leaching, even in peat-based growing media.

What is vermiculite? Vermiculite is a hydrous phyllosilicate mineral that expands dramatically when heated—a process known as exfoliation. The resulting flaky, layered particles store water and nutrients while remaining breathable, supporting healthy root development. It forms naturally through the weathering or hydrothermal alteration of minerals like biotite or phlogopite, and this unique structure is what makes it so effective in horticulture.

Why Sinclair Fine Vermiculite 100 Litre stands out

• Laminar, fine texture designed for precise mixing and even distribution in seed mixes and potting blends.
• Strong nutrient retention via high cation exchange capacity, helping soluble nutrients stay available to plants longer than with traditional mulches or sands.
• Moisture management for peat-based media—improves water holding without sacrificing aeration, reducing the risk of drying out between waterings.
• Ideal top dressing for seed sowing—lightly covers seeds and aids uniform germination and early establishment.
• Bulk packaging for value—a 100 Litre bag is well-suited for home growers, allotments, and smaller commercial setups.
• Heritage you can trust— Sinclair brings over 165 years of horticultural expertise and now sits within the Westland family, combining tradition with modern practice for reliable results.

How to use Sinclair Vermiculite Fine 100 Litre

1. In containers or raised beds: mix 1/3 to 1/2 vermiculite into potting soil or growing media for improved structure and nutrient retention.
2. In garden soil: incorporate vermiculite in spring with other soil amendments or compost to enhance moisture holding and aeration.
3. For lawns and seed areas: spread a ¼ inch layer evenly over the planted area after seeding, then irrigation should be thorough to integrate the material.
4. Seed sowing and transplanting: spread vermiculite over the soil surface to lightly cover seeds or young plants, water gently, and watch for even moisture distribution.
5. To enrich an existing compost: blend in to improve moisture retention and nutrient availability for the next cycle of use.

Whether you’re building custom potting mixes, topping seed beds, or boosting lawn establishment, Sinclair Vermiculite Fine 100 Litre provides a tangible, practical upgrade. Its moisture-retentive, nutrient-friendly profile makes it a dependable staple for gardeners who want steadier results from their compost, soil, and seed-starting efforts. Add it to your toolkit and experience calmer moisture levels, reduced nutrient loss, and steadier seedling growth across a range of growing scenarios.