New or transplanted trees, shrubs and plants have not formed an extensive root system much beyond the fill area and have few shallow roots. Therefore, water soluble fertilizer is best when placed in and around the area of the planting hole.
Stage 2: On young landscape trees and shrubs where rapid growth is desirable, use a high maintenance nitrogen rate. A low maintenance level should be used in situations that restrict growth (eg. slow growing and dwarf species, dry or compacted soils, and where the plant has a restricted root zone). For trees in lawn areas, do not exceed 0.1 lb N/100 sq. ft. per application unless a slow release or natural fertilizer is used. Higher rates will burn the grass.
Stage 3: As trees and shrubs mature and growth rate naturally slows down, the need for nitrogen drops. Low maintenance level should be used to maintain landscape plants in a healthy condition without excessive vegetative growth.