I know this isn't lawn care, but this is the most educated forum I've found on commercial organics, SO here goes: My company offers organic fertilizing for shrubs, annuals and perennials. I have been using Espoma fertilizers but I haven't been totally happy with my results. I am looking to formulate my own fertilizer. I would like to use dry product for the shrubs and perennials and liquid for the annuals. If anyone has any advice on what has worked for them, I would love to hear it. Most of my jobs have shredded hardwood mulch, so nitrogen will be more important. I am working with mostly clay soils that are the leftovers after builders strip the land and sell the topsoil. I have some clients who recognize the importance of OM and go for some topdressing of composted manure in landscape beds, but most aren't interested. I topdress all my annual beds with composted manure annually about two weeks before planting. All of the plantings I install get plenty of OM at installation, so I'm mostly interested in maintenance of shrub and perennial plantings that get only mulch as OM. Oh, and by the way, does anyone know if MI follows the US EPA non-regulated pesticides list? I've been waiting to hear back from the MI Dept of Ag for over a week about it. Thanks for any info.