HDI Root Riot® Plant Starter Cubes - 50 TrayIn store Location: @H17 HDI Root Riot Plant Starter Cubes 50 Tray Root Riot is a natural plant starter cube ideal for soil or hydroponics. Suitable for both propagating cuttings and starting seeds, these cubes have been shown to consistently outperform alternative media. Root Riot cubes provide the perfect environment for root initiation and development.