Uni-Gro Vermiculite Soil Additive

Improve your soil’s texture, water retention, and nutrient-holding capacity with this ready-to-use, natural vermiculite additive.Uni-Gro® Vermiculite features lightweight, accordion-like particles that expand when hydrated, helping to create a balanced growing environment that retains moisture while improving aeration and soil structure.

This mineral-based amendment also helps prolong nutrient availability, ensuring plants have consistent access to essential minerals over time. Ideal for use in potting mixes, seed starting, and propagation, vermiculite supports healthy root development and steady growth for both indoor and outdoor plants. Its sterile, pH-neutral composition makes it safe for use with a wide range of plant types, including vegetables, herbs, flowers, and houseplants.

Whether you’re conditioning soil or germinating seeds, this long-lasting additive enhances plant health and encourages strong, resilient growth in every garden setting.

Find more natural soil conditioners and growing media in our Soil Amendments collection.

• Material: Natural vermiculite mineral
• Function: Retains moisture and improves aeration
• Use For: Potting mixes, seed starting, and propagation
• Benefit: Prolongs nutrient release and enhances soil texture
• Quality: Sterile, pH-neutral, and safe for all plants
• Size: 12 qt ready-to-use bag