WOW! This stinks, but for good reason. Pegasus Potion is a nitrate-free, totally available protein source of nitrogen. Nitrogen proteins are extracted from feathers and digested into their simplest, most available forms. Pegasus Potion works great as a foliar treatment with fast results and can be used as an additive to the rest of the line. If you feel you need more nitrogen and don't want the burn or the stench, then Pegasus Potion will show you how it's done.