so begin the mowing wars

I live in an L-shaped building (on the left in the picture) that faces another L-shape to make a U-shape with a big yard in the middle. When the spring rains come, the grass skyrockets. The two buildings are owned by different people which means that ownership of the lawn is also divided. Of course they have to use different lawn care services, and of course, those services don't mow on the same day. If you notice in the picture, the right side is freshly mowed while the left stands a good 2 inches high and is over run with dandelions.