I'd like to add another thing Maybe if you're servicing...lets say less than 150 lawns then you might have the option to wait a bit longer before getting started. But if you're serviceing say 500 lawns per route then you have to get it going now, you aint got the option to wait. So there may be snow, especially near walkways/driveways where it gets piled up after shoveling, no big deal. Thats why most every company offers free service calls. Lets face it, any preemergent control needs to be watered in and how many of your customers are willing to water in March or April or even May with some people? So if we go by the method of snow and cant do the app then we must also wait til rain for a reliable watering in of the product. Cant run a business doing that.