
Tree Disease Treatment + Fertilization in Cincinnati, Ohio
Ensure the health and longevity of your trees with the comprehensive services of Gregory Forrest Lester, Inc.
For homeowners, businesses, and municipalities alike, trees are not just a part of the landscape but also a valuable investment. However, like any living organism, trees require proper care to thrive. Nutrient deficiencies in the soil can hinder their growth, leaving them vulnerable to diseases and pests, ultimately shortening their lifespan.
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At Gregory Forrest Lester, Inc., we understand the importance of maintaining the health of your trees. Our ISA Certified Arborists conduct thorough inspections of your landscape to identify any issues affecting your trees. Whether it's a nutrient deficiency, tree disease, or pest infestation, our experts are equipped with the knowledge and state-of-the-art equipment to diagnose and treat the problem effectively.
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From tree disease diagnosis to tree fertilization and pest treatment, we offer tailored solutions to suit your needs. Our goal is to provide you with cost-effective and environmentally friendly treatments that ensure the vitality and longevity of your trees.
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Serving Cincinnati, OH and Northern Kentucky, Gregory Forrest Lester, Inc. helps protect valuable trees across residential, commercial, and municipal properties. Leave the health of your trees in the hands of our experienced team—and watch them flourish for years to come.

Tree fertilization customized to your needs

Specialized Injections
Experience the effectiveness of our specialized micro-injection services. Our treatments are designed to boost tree health while effectively targeting and eliminating insects and diseases. Each program is customized to meet your unique requirements, ensuring optimal results for your trees.
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Trust our expertise to provide tailored solutions for a thriving and resilient landscape.
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Popular treatment options include:
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Nutrient injections
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Disease suppression programs
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Insect control injections
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Targeted “tree doctor” treatment plans

Deep Root Feeding
Our deep root feeding technique nourishes your tree's roots extensively, reaching out to the drip line. This process not only provides essential nutrients but also aerates the soil, enhancing overall root health.
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Nutrient root hydration is maximized through this deep root treatment, promoting the development of a robust root system, including delicate, hair-like roots.
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We tailor the fertilizer to suit the specific requirements of your trees, ensuring optimal nourishment and vitality.
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Deep root feeding is ideal for Cincinnati properties with:
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Clay soil
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Compacted lawns
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Trees stressed by heat and drought
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Decline after construction or trenching

Tree Spraying Program
(Insect & Disease Control)
We provide a diverse range of sprays designed to address various insect infestations. Whether you're dealing with ants, borers, leaf-eating caterpillars, spider mites, bagworms, fungal diseases, or any other pests, we can customize a program specifically tailored to your needs.
Our spraying programs may include:
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Fungicide sprays
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Insect control sprays
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Seasonal protection programs
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Targeted treatments based on arborist diagnosis

Common Tree Diseases We Treat in Cincinnati
Tree disease is extremely common in the Cincinnati area due to humidity, seasonal storms, and soil conditions. Early diagnosis is key to protecting valuable trees before decline becomes irreversible.
Our arborists commonly evaluate and treat issues such as:
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Anthracnose
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Powdery mildew
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Leaf spot diseases
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Fire blight
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Root stress and fungal decline
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Needle cast (spruce and pine)
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Canker diseases
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Environmental stress-related decline
If your tree is showing signs like thinning leaves, early leaf drop, dead branches, or unusual discoloration, our team can help determine the cause and recommend the right treatment.

Signs Your Tree May Need Fertilization or Disease Treatment
Trees often show early warning signs before major decline occurs. Call our team if you notice:
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Yellowing or browning leaves
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Thinning canopy or sparse growth
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Dead limbs or branch dieback
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Premature leaf drop
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Mushrooms or fungal growth near the base
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Leaf spotting or curled leaves
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Insect activity or borer damage
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Decline after construction, grading, or drought

Why Choose Gregory Forrest Lester, Inc.
When it comes to tree fertilization and tree disease treatment, experience matters.
Our customers trust us because we provide:
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ISA Certified Arborist guidance
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ISA Board Certified Master Arborist expertise
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ISA Member
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ISA Tree Risk Assessment Qualified (TRAQ) professionals
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TCIA Member standards and safety practices
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BBB A+ Accredited reputation
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5-star Google reviews
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Clear written proposals and honest recommendations
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Technical expertise for large and high-value trees
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Long-term care solutions
We take pride in professional work that protects both your trees and your property.
FAQs Tree Health

Do trees really need fertilization?
Not always. In many cases, the goal isn’t “fertilizing”, it’s improving overall tree health by correcting soil deficiencies, reducing stress, and supporting root function. Our certified arborists evaluate the tree first and only recommend treatments that make sense for long-term performance.
Is this more about soil health than fertilizer?
Yes. Healthy trees start with healthy soil. Our programs focus on root-zone conditions, moisture availability, and nutrient balance, especially in compacted or clay-heavy Cincinnati soils.
Can deep root feeding help a stressed or declining tree?
It can. Many trees decline due to drought stress, compacted soil, construction impacts, or nutrient imbalances. Supporting the root zone can significantly improve a tree’s ability to recover, but the right approach depends on diagnosis.
Do you offer insect and fungus treatment programs?
Yes. We offer customized spraying and injection programs designed to target insects and disease while protecting the long-term health of the tree.
Do you provide written recommendations?
Yes. We provide clear written proposals and recommendations so you understand what is being done, why it matters, and what results to expect.
What is deep root feeding and why is it different?
Deep root feeding is a professional tree health treatment that delivers nutrients and soil amendments directly into the root zone. This supports root function, improves soil conditions, and helps trees recover from stress—without relying on surface-applied products.
When should I have my trees evaluated?
If you notice thinning canopies, early leaf drop, poor growth, dieback, or discoloration, it’s a good time to schedule an arborist evaluation. Many tree health problems are easier (and less expensive) to address early.
Do you treat tree diseases or just improve overall health?
Both. We diagnose and treat many common tree diseases and fungal issues, but we also focus on strengthening the tree overall, because healthy trees resist pests and disease more effectively.
How often should tree health treatments be done?
It depends on the tree species, site conditions, and stress factors. Some trees benefit from seasonal support, while others only need periodic treatment. Our ISA Certified Arborists will recommend a plan based on what your trees actually need.
Can all trees be saved?
Not always. Some trees can recover with the right treatment plan, especially when decline is caught early. However, if a tree has severe structural damage, advanced decay, major root failure, or long-term decline, it may not be a good candidate for treatment. Our ISA Certified Arborists will give you an honest assessment and recommend the best option, whether that’s a tree health program, corrective pruning, or removal for safety.










