The Perlite 4 CuFt Potting Soil is a lightweight, sterile, volcanic mineral for horticultural use. This medium to coarse-grade perlite improves soil aeration and drainage, making it ideal for potting mixes, seed starting, propagation, and container gardening. It is pH-neutral and mixes easily with peat moss, coco coir, compost, bark, or other soilless substrates to create well-structured growing media.