Chunky Perlite is a large, super lightweight and naturally occurring volcanic glass. When heated to the appropriate temperature during processing, it expands like popcorn. As a soil amendment, perlite keeps mixes lighter, offers ample room for root aeration, and allows water to flow through. It’s popular for use with many leafy plants and orchids. Chunky Perlite is a large, super lightweight and naturally occurring volcanic glass. When heated to the appropriate temperature during processing, it expands like popcorn. As a soil amendment, perlite keeps mixes lighter, offers ample room for root aeration, and allows water to flow through. It’s popular for use with many leafy plants and orchids. Terrain is a garden and home brand deeply rooted in nature and plant life. From weather-ready planters and outdoor furniture to artisan-made wreaths and hand-poured candles, their curated product assortment explores the boundaries of life lived outside and in. With a globally conscious, locally influenced point of view, Terrain offers inspired seasonal solutions for creative living, gathering, and gardening.