BIG FOOT ROOT BOOST 2 oz. 5 oz. 10 oz. 32 oz. 15 lb. Nitrogen-Fixing Azospirillum Big Foot Root Boost waters into your existing plants and helps build healthy, vibrant roots.  Big Foot Root Boost contains Azospirillum brasilense, an all natural, powerful nitrogen-fixing beneficial bacteria that lets your plants thrive in the soil it’s already … Continue reading Big Foot Root Boost Nitrogen-Fixing Azospirillum