Thermo-O-Rock Vermiculite

Coarse grade vermiculite has larger particles, which are ideal for improving aeration and drainage in potting mixes. It creates more space for oxygen to reach roots compared to fine-grade options, making it perfect for long-term container gardening or plants that prefer well-draining soil.

Yes, this is a horticultural-grade vermiculite suitable for soil-less hydroponic systems. Its structure provides excellent physical support for roots while effectively holding the water and nutrients necessary for plant growth.

Yes, this product is OMRI Listed, meaning it has been reviewed and approved for use in organic production systems. You can use it confidently in your organic vegetable or flower gardens.

A common starting point is to mix one part vermiculite with three or four parts of your base soil, compost, or peat moss. You can adjust this ratio based on your specific plants' needs—use more vermiculite if you need higher moisture retention or better aeration.

Absolutely. One of the primary benefits of vermiculite is its ability to hold onto water and release it slowly to the roots as needed. Incorporating it into your mix will significantly improve the moisture retention of your growing medium.