The Firefly Petunia Glows in the Dark Here's Where to Get One Gardening Know How Family: Amaranthaceae (amaranth and goosefoot family): Go Botany The most important part of the kava plant is its root system. Kava roots are long, slender, and fibrous, often reaching depths of several feet into the soil. These roots contain the 25 Planter Ideas: Welcoming Front Gardens & Porches My First Plant Book Non rooted Floating Vegetation Kentucky Department of Fish & Wildlife