Tree Services
- Airspading Root Management
- Crane Service For Hazardous Removals
- Cabling Bracing and Tree Support
- Fire Prevention Clearance
- Pre Build Planning
- Stump Grinding
- Tree Brush Chipping
- Tree Fertilizing
- Tree Planting & Transplanting
- Tree Pruning, Shaping & Trimming
- Tree Removals
- View Restoration
- 24-Hours Tree Emergency
Strengthen Your Trees with Targeted, Soil-Deep Nutrition
In Sonoma County, trees face a variety of environmental stressors—from long, dry summers and compacted soils to nutrient deficiencies and pest pressures. Over time, even well-established trees can begin to decline without the proper support. That’s where Image Tree Service’s Deep Root Fertilization comes in. Our deep root fertilizing method is the most effective way to nourish trees and shrubs, ensuring they receive essential nutrients directly at the root.
Deep root fertilizing helps shrubs as well as trees by providing necessary nutrients directly to their root zones, particularly in urban environments where soil conditions can be poor.
Since 1998, we’ve helped homeowners, property managers, and vineyard owners across Sonoma County give their trees the essential nutrients they need—right at the root zone. Our deep root fertilization service is designed to promote stronger root systems, healthier canopies, and better resilience against drought, disease, and other threats. This method also helps address issues with dying branches by improving overall tree health from the tips of the branches back.
Additionally, fertilizing the root improves nutrient uptake, allowing roots to efficiently absorb necessary nutrients and enhance soil structure.
What Is Deep Root Fertilization?
Deep root fertilization is a specialized tree care technique that involves injecting a custom-blended liquid fertilizer directly into the soil surrounding a tree’s root zone—typically 8 to 12 inches below the surface. This method delivers essential nutrients right where the tree needs them, bypassing surface competition from grass or other plants, making it an effective way to fertilize trees.
Gravity plays a crucial role in this fertilization process, helping nutrients reach the deeper root zones.
Unlike traditional surface fertilizers, deep root injections:
- Improve nutrient absorption at the feeder root level
- Loosen compacted soil and improve aeration
- Promote deeper root growth
- Increase drought tolerance
- Support recovery from stress, pruning, or damage
The process involves injecting the tree fertilizer directly into the tree’s root system, ensuring that nutrients are absorbed efficiently. This method eliminates the need for nutrients to be broken down and solubilized, making it superior to surface fertilization.
It’s one of the most effective ways to revitalize trees that are declining or to proactively maintain the health of high-value trees on your property. Deep root fertilization also helps trees survive environmental stresses, improves soil structure, and enhances the overall health of trees. It is particularly effective in lawns, where surface fertilization often fails due to competition from grass roots.
Additionally, the use of a grid pattern ensures even nutrient distribution, and the inclusion of essential elements like iron and nitrogen further boosts tree health.
Ready to get started? Contact Image Tree Service today.
Tailored Treatments: Essential, Premium & Palm Fertilization Options
We offer specialized deep root fertilization services depending on your tree type and condition:
Essential & Premium Treatments
These services aim to enhance soil health, strengthen tree or shrub resilience, and improve overall aesthetic appeal. Recommended yearly or as needed.
Common signs your trees may benefit:
- Soil compaction
- Thinning foliage
- Chlorotic or discolored leaves
- Stunted growth
- Signs of drought or construction damage
Our arborists recommend premium treatment for sensitive or high-value trees, as it offers the most robust nutrient support and can spread faster. Fertilizers are often used, and water volumes are adjusted to meet root zone needs based on tree size and soil area.
Palm Tree Fertilization
Palms have unique nutrient requirements and benefit from specialized care three times per year—spring, summer, and fall.
Look for signs such as:
- Yellowing or browning fronds
- Nutrient-deficient soils
- General stress from poor soil health
We use palm-specific blends rich in magnesium and manganese, especially for date and non-date palms. Our team advises allowing fronds to fully brown before removal, as they continue to provide energy to the plant during decline.
All fertilization services are applied using high-pressure soil injections to deliver nutrients directly to the active root zone.
Deep Root Fertilizer Is Ideal for Sonoma County’s Trees and Soil Conditions
Many areas in Sonoma County have soils that are sandy, clay-heavy, or compacted—especially in urban and residential settings. Combined with long dry spells and periodic drought, trees often struggle to access the oxygen they need from the ground.
Deep root fertilization is especially beneficial for:
- Valley oaks and coast live oaks under stress from drought or soil compaction
- Redwoods and pines facing needle drop or thinning canopies
- Ornamental species like Japanese maples, dogwoods, or magnolias
- Fruit trees (apple, fig, plum, and others) with poor fruiting or leaf yellowing
- Recently transplanted trees adjusting to new locations
- Vineyard trees or buffer plantings needing consistent nutrient support
Our experienced arborists will assess your specific tree species, soil type, and current health to determine the best fertilizer blend and injection method for long-lasting results.
When You Should Be Fertilizing Trees
In Sonoma County, we typically recommend deep root fertilization in early spring or fall, when trees are either coming out of dormancy or preparing for the new growth cycle. For palms, treatment is ideal three times annually.
If a tree is in visible decline or recovering from damage, treatments can be scheduled as needed throughout the year.
Signs your tree could benefit from deep root fertilization:
- Yellowing or discolored leaves
- Sparse or thinning canopy
- Poor annual growth
- Stress after pruning, construction, or drought
- Compacted or poorly draining soil
Why Choose Image Tree Service for Tree Care?
- Over 20 Years of Local Expertise: We understand the specific soil, climate, and tree care challenges unique to Sonoma County.
- Certified Arborist Oversight: Our team includes ISA-certified arborists who guide every fertilization plan with precision and care. It makes a big difference to work with a crew that is highly-trained and educated on industry standards.
- Custom Nutrient Blends: We tailor each deep root treatment to the needs of your trees and soil—no one-size-fits-all solutions.
- Environmentally Responsible Care: Our methods support sustainable, long-term tree health with minimal impact to surrounding plants.
- Free Estimates and Honest Recommendations: We never push unnecessary treatments. We’re here to help you protect your trees and your investment.
Schedule Deep Root Fertilization Today
Whether your trees are struggling or you want to keep them growing strong, deep root fertilization is a proven way to support health from the ground up. Contact Image Tree Service to schedule a consultation or request a free estimate anywhere in Sonoma County. We know the best way to treat any kind of tree, shrub, or plant.
See Why We Are the Best in Sonoma County
Our Reviews and Testimonials
“Image Tree Service comes through again!”
This is the second project that they have done for us in the past couple of years. They again showed up on time, completed the work professionally and safely.
– Steve S.
“I highly recommend Image Tree Service!”
We were very pleased with the work and felt they charged us a reasonable price for all the work they needed to do in our yard. I highly recommend Image Tree Service.
– Joy C.
“Image Tree is the best!”
They worked non-stop for three days straight on our property, carefully trimming each tree. They really understand how to trim trees so that they look much lighter and beautiful.
– Jaqui A.
“If you want a reliable, quality tree service, call Image Tree Service!”
We have almost 1,000 trees on our property and Image always comes through for us. They do a beautiful job shaping the trees, so when the branches grow out, the tree is healthy.
– Marnie H.
“We will definitely use them again in the future!”
Image Tree Service went above and beyond what we expected. In addition to doing the work we needed they cleaned up after themselves and left our property better than they found it.
– Kelly C.
“They have made my job easier!”
Being a property manager, I work with many subcontractors, some better than others. Jeff at Image Tree Service stands out above the crowd. Personable, reasonable, accommodating, knowledgeable, and affordable.
– Christie G.
