Soil for microgreens and herb seedlings, peat-free, lightweight, and 4L bag, Grow Soil Specially developed by Grow Win, this substrate mix is for growing microgreens. Peat-free composition, which is important for the environment 🙏 This soil mix is composed of coconut fiber, perlite, vermiculite, and worm compost to achieve balanced water retention and aeration. 4 L bag 100% natural, compostable. Composition of our mix: coconut soil, perlite, and worm compost