What’s happening here? Our horticulturist for the Urban Bird Garden is vertical mulching. Vertical mulching is a soil treatment practice that improves tree health by aerating the soil around a tree’s root system followed by incorporating nutrients into the air pockets. Compressed air displaces the existing soil so nutrient-rich compost can be easily added thereby improving the overall soil texture and nutrient characteristics. Vertical mulching improves aeration and drainage, which helps our tre