Knob Hill Restoration Plan by Sasafrass Land Care. Phase 1 - Installation of Trees and Shrubs. Phase 2 - Installation of Herbaceous Wildflowers, Grasses and Ferns. Devan Arnold plants a Silky Dogwood as part of this phase 1 installation. Michael, Sassafras Land Care associate, prepares the next shrub for planting. Each tree and shrub was carefully planted, fed with organic compost and then retained with natural materials.