It is natural and organic so you dont have to worry about nasty chemicals, it wont burn your grass if you over apply and it wont stain concrete unlike chemical fertilisers. And best of all it works better and faster than other fertilisers. Also over time it improves the structure and moisture retention of the soil and encourages earthworms and beneficial soil micro-organisms.
works exceptionally well, is completely natural, relatively cheap
leaves a slight maneure smell for a couple days