Hello, So I have taken the NOFA organic land care course up here in MA. Northeastern organic land care. Anyway they really emphasize only using compost tea, never use roundup etc. Anyways, heres the thing - one of my clients has a lawn that takes me 4 hours to mow, its a big lawn, last year it was a great lawn, i wasnt mowing or fertilizing. then this year i started mowing and someone started fertilizing using compost tea. And well the lawn looks like ^&*(!. I mean its completely overburdened by weeds, crabgrass, bermuda grass, its an awfull looking lawn now and im imbarrassed. Anyways, how do you all control weeds from taking over? Pre-emergents work well! ...but you dont use them??? how are they toxic? So you only top dress?...how much does that cost?..and how do you apply it? I just throw it with a shovel and hate it. I mean a GREEN LAWN IS A HEALTHY LAWN--chemicals or not my friends looks healthy probably because it is! the green industry is a scam...I got a degree in environmental studies and took a organic land care program, I keep exposing myself to alot of "organic" ideas but to tell you the truth I don't think any of the ideas are worthwhile.