The green season on Rainy Lake is short and generous — grass comes up late and then grows as if it knows better. MD Property Services LLC mows through those quick northern weeks, holding shoreline lots and town yards even from the first cut to the last one ahead of frost. Trimming along the path to the boat landing, the sauna corner and the woodpile edge is what separates a mowed yard from a finished one. The spring round clears the winter mat and the branches that ice brought down. By the time the birches turn along the border, a kept yard has earned every week of it.