I'm intending on doing more organic lawn care for my mowing clients and I've heard that it should be an all or nothing thing. The reasoning is that synthetic fertilizers kill the biology in the soil, while the whole purpose of Organic style lawn care is to boost and nurture life in the soil and they will, in turn, nurture the plant life. Even if I'm using a slow release fertilizer should I still expect that it's harming the good stuff in the soil? Is there a certain element in fertilizers that does the damage and I just need watch out for it? Is there a happy medium between all natural and synthetic? Thanks in advance for any advice!