Holganix Bio 800 Tree and Shrub One GallonHolganix Bio 800 Tree and Shrub One Gallon Promote healthy growth and resilience in your trees and shrubs with Holganix Bio 800+ Tree and Shrub One Gallon. By recreating a natural environment, this product builds up beneficial microbes to improve root development and nutrient absorption. Give your landscaping the optimal conditions for thriving plants. Creates strong plants Promotes robust roots Beneficial microbes Increases nutrient absorption