You've got the right idea, j! But if other contractors have sites that have various LCOs, sometimes it can get very tough to communicate. As a organic-bridge LCO, I've found one effective way to get things done is to channel requests thru the customer themselves. For example, sidewalk edges tend to get the most weeds, particularly by late summer, right? On sites that have had a history of this, if I don't know who the mowing contractor's going to be for that given year, I'll ask the customer to see to it that the sidewalk / driveway edges are done before our early spring application of corn gluten or Dimension along these edges. I'll explain that this is important because the 'edge soil' should be pretty much left alone for the remainder of the season, or else crabgrass, spurge, purslane etc will be likely to encroach, regardless of what kind or brand of pre emergent applied. From that point on until the end of the season, only string trimmers are to be used to edge, mimicking the height of the rest of the lawn as much as possible. I've found that most clients are willing to take on the task of communication in this way, as long as the line of communication is open to both parties & they know the positive end-result will ultimately be to their own. It can work the other way, too. If you & the client agree there's little reason for copius amounts of N at a given time of the year & you can't get in contact with the LCO yourself, have the client talk to the LCO about using less N & maybe more iron, or organics. If the client isn't astudt enough in the language of the biz, pass a note through the customer with your request. Both of you are working for the same person & not directly competing with each other. It's only logical that you'd want to work together as much as possible to do what's right for that customer.