Enhance Drainage and Aeration with Viagrow Chunky Horticultural Perlite Viagrow Chunky or Ginormous Horticultural Grade Perlite is designed to improve water absorption, aeration, and drainage in soil and soilless growing media. This coarse-grade perlite is pH neutral, odorless, and can be used alone as an inert hydroponic growing medium with excellent capillary action and air retention. It is also ideal for mixing with coconut coir (VCCB5), vermiculite, and other substrates to create a high-performance raised bed or container gardening mix. Viagrow Perlite is lightweight and perfect for rooftop gardens, hydroponic systems, indoor and outdoor gardening, landscaping, compost aeration, and bulb or tuber storage.