Professional Tree Fertilization Services

Nourish Your Trees From the Roots Up

Enhance tree health and vigor with professional fertilization services from Cousins Tree Service. We provide science-based nutrient programs that address deficiencies, promote robust growth, and improve overall tree vitality and resistance to stress all tailored specifically to the trees and soil conditions on your property.

Urban and suburban trees often lack the natural nutrient cycling found in forest ecosystems. Compacted soils, limited root space, competition from turf grass, and the routine removal of fallen leaves all contribute to progressive nutrient depletion over time. Without intervention, this leads to slow growth, yellowing foliage, and declining resistance to pests, diseases, and environmental stress.

Professional fertilization replenishes essential macro and micronutrients, restoring the conditions trees need to thrive. Our programs are designed around soil test results and the specific requirements of each tree species not a one-size-fits-all approach.

Comprehensive Fertilization Programs

• Soil Testing: Laboratory analysis to identify specific macro and micronutrient deficiencies before any application.
• Custom Formulations: Fertilizer blends tailored to your specific tree species, soil type, and seasonal conditions.
• Deep Root Injection: Liquid fertilizer injected at pressure directly into the active root zone for maximum efficiency.
• Slow-Release Applications: Granular products that break down gradually, delivering sustained nutrition over 4–6 months.
• Micronutrient Supplements: Targeted iron, manganese, zinc, and other trace element treatments for deficiency correction.
• Seasonal Timing: Applications strategically scheduled for spring uptake, fall storage, and post-stress recovery periods.
• Organic Options: Biologically active, compost-based programs for clients seeking a natural approach to tree nutrition.

Signs Your Trees Need Fertilization

• Pale green or yellowing leaves (chlorosis) that appear outside of autumn
• Noticeably slower growth compared to previous years
• Smaller than usual leaf size or sparse canopy density
• Increased susceptibility to insect infestations or fungal disease
• Dieback at branch tips or premature leaf drop
• Poor recovery following drought, construction disturbance, or root damage
• Trees recently transplanted or established in new construction soil

Benefits of Professional Fertilization

• Improved growth rate, canopy density, and branch development
• Richer, deeper leaf color throughout the growing season
• Stronger resistance to pest pressure and fungal pathogens
• Faster recovery from environmental stress, drought, and physical damage
• Effective correction of chlorosis and other visible nutrient deficiencies
• Significantly extended tree lifespan and long-term structural integrity
• Healthier root systems and improved soil biology around the root zone

Our Application Methods

We use deep root injection as our primary delivery method a technique that places liquid fertilizer directly into the root zone at the depth where feeder roots are most active. This ensures efficient nutrient uptake while minimizing surface runoff, reducing fertilizer waste, and eliminating the risk of over-applying to turfgrass or surrounding plantings.

For large trees or areas with extensive root systems, we supplement with broadcast applications of slow-release granular fertilizers. These products are incorporated at the soil surface and work their way down with irrigation and rainfall over the course of the growing season, providing a steady background level of nutrition between our deeper injection treatments.

All application rates are calibrated to the results of your soil test, the diameter of the tree being treated, and the time of year. We record treatment details so your program can be tracked and adjusted over time as your trees respond and soil conditions change.