Parking and storage yard vegetation control services: We provide weed control services for storage yards and parking sites including tank yards, lumber yards and other facilities prone to weed growth. Our service is guaranteed for season long control. We do not employ the use of ground sterilant. We typically spray lots and yards in late May to June with a formulation that will kill emerged and growing weeds and leave a residual pre-emergent barrier. This combination does well on sand, gravel and asphalt parking areas. Once applied our products will give control for 4 -6 months. Should you find any areas of breakouts we will return and treat for no additional charge.