The Viagrow Chunky or Ginormous horticultural grade perlite increases water absorption & aeration when added to soil & soilless growing media. Viagrow coarse grade horticultural perlite is pH neutral and odorless. Use Viagrow Coarse and Chunky perlite alone for a completely inert hydroponic medium with good capillary & air retention properties. Perlite can also be added to any medium to improve texture, aeration and drainage. Combined chunky perlite with coir (coconut fiber) VCCB5, & Vermiculite for a great raised bed or container gardening mix. Course and chunky perlite is light weight and great for roof top gardening, hydroponic media, indoor and outdoor gardening, landscaping, bulb and tuber storage and can be used for compost aeration among many other uses. For smaller perlite particle sizes, search codes VPER4 & VPER1. Viagrow perlite bags are biodegradable and environmentally friendly.