Deep Root Tree / Shrub Fertilization



Get Free Estimate


100% Organic Fertilization for Trees and Shrubs

Many urban trees and shrubs are growing in soils that are considered to be “dead soils”. Due to the high pH, salinity, and high clay content, urban trees are unable to extract the nutrients they need from the soil. Without proper nutrition the trees are unable to create enough energy to grow properly and sometimes they stop producing chlorophyll. Urban trees often show signs of nutrient deprivation with leaves that become yellow prematurely, are susceptible to fungus and insect pressure, and have stunted growth. Deep root organic tree fertilization helps get trees and shrubs back to a state where they can survive and thrive. Call your local tree fertilizer company in Boulder or Fort Collins at Organo-Lawn today at (303) 499-2000 (Boulder) or (970) 225-9425 (Fort Collins)!

Deep Root Tree and Shrub Fertilization is one thing that most people neglect in their lawn care maintenance programs. In a forest trees grow in their natural habitat and their leaves nature naturally replenishes the soil. In the city trees are often planted in foreign location where soil, sun, moisture, and climactic conditions are not favorable. Many trees are also over watered or improperly watered, which causes soil compaction and starves the tree roots of air.

Trees also struggle in cities because of dead soils, compounded growing space for roots, air pollution, and compacted soil. Due to these stressful conditions the average lifespan of an urban tree that is not properly cared for is only 10-15 years. In Colorado many trees such as ashes, oaks, birches and maples are foreign to the region, but are popular urban selections because they provide beautiful fall color. These fall color trees, however, become stressed very quickly if not properly fertilized at least once per year.

Fall color trees like maples and oaks often develop a condition called chlorosis. In the summer months, the leaves that used to be a lustrous dark green are often a pale yellow-green and in the autumn, leaves that should be vibrant reds, oranges, and yellows often are dull red-browns, orange-browns, and yellow-browns. This weakening of the tree's leaf color is a result of “dead soils” which result in inability for the tree to pick up and uptake nutrients like iron and magnesium. This potentially deadly, but treatable tree problem is called iron chlorosis.

Organo-Lawn is your Boulder and Fort Collins local tree care expert. Before you schedule a tree fertilization with a different company, make sure to talk to an expert at Organo-Lawn. Call our Boulder area office at (303) 499-2000 or Fort Collins office at (970) 225-9425.

Tree Fertilizer Companies - BoulderDeep Root Tree Fertilization is applied by an injection into the root zone.

Interesting Tree Facts:
  • Approximately 75% of urban woody plant symptoms are caused by abiotic conditions or a non-living problem like poor soil, improper watering, people, pollution, poor drainage, chemicals, etc.
  • The average lifespan of an urban tree in Colorado that is not regularly fertilized is only 10-15 years.
  • 95%+ of trees species planted in Colorado urban spaces are not native species.

What is in the Organic Tree Fertilizer?

At Organo-Lawn, your local tree fertilizer company, our 100% organic tree fertilizer is a proprietary blend that we inject into the tree’s root-zone. The blend is a special mix of the beneficial fungus mycorrhiza, chelated iron, yucca extract, humate, micro-nutrients and our slow release organic fertilizer we call MDS Compost Tea.

In the spring the trees use the nutrients to support healthy growth and in the fall the trees use the nutrients in the organic tree fertilizer to develop and strengthen their root system.

Due to our 100% organic slow release tree formulation, we are able to fertilize newly transplanted trees and strongly recommend tree fertilization for trees that are less than 4 years from transplant. Our organic fertilizers are safe and won't damage the tree's roots even for a tree that has been transplanted with 3 months.

What Types of Tree Species Need to be Fertilized in Colorado?

Trees that we consider to be a “must-do” for tree fertilization include:

  • Fall color trees like ashes, birches, oaks and maple trees.
  • Any tree under stressful conditions such as heat or drought stress, extreme cold, nutrient deprivation, and/or biotic stress such as insect pressure.
  • Young trees that have not established their root system into the soil.
  • Trees living in clay or dead soils.
  • Colorado is a difficult environment for the health of a tree and all trees will benefit from deep root tree fertilization. If you are not sure what trees on your property need to be fertilized versus which could benefit from fertilization please contact your local tree fertilizer company, Organo-Lawn, for more information. Call our Boulder area office (303) 499-2000 or Fort Collins area office (970) 225-9425.

Tree Fertilizer Companies - Fort CollinsThis Autumn Blaze Maple leaf
is suffering from Chlorosis.
Notice the yellow foliage and green veins

Abiotic Conditions that Cause Trees to Struggle

1. People causing Tree Pressures

a. Planting problems (planted too deep)
b. Soil disturbances (digging or construction)
c. Misuse of mulches, plastic, or landscaping materials
d. Poor plant choices for planting location
e. Air pollution

2. Soil Problems

a. pH too high. This is very common in Colorado (especially in Longmont, Erie, Lafayatee and Loveland) and causes mineral deficiency.
b. Soil compaction (very common in Colorado)
c. Poor soil drainage

3. Climate or Weather Issues that Affect Trees

a. Untimely cold or freezes (very often in Colorado)
b. Early or late snow (common in Colorado)
c. Hail, wind, lightning (common in Colorado)
d. Sunscald (winter tree wrapping prevents sunscald)

4. Mechanical or Physical damage

a. Tree trunk injury (trimmer or mower damage)
b. Improper tree pruning

5. Water or Irrigation Problems

a. Drought (common in Colorado)
b. Excessive watering or poor soil drainage (water replaces the air in the soil and causes a lack of oxygen in the soil)

6. Chemical Hazards

a. Salts and magnesium chloride
b. Improper herbicide or pesticide use (commonly from 2,4-D applications)

Tree Fertilizer Companies - Longmont CO

This is what an Autumn Blaze Maple
leaf should look like and will look
like with proper deep root tree fertilization.

Why does Organo-Lawn add Mycorrhiza to the Organic Deep Root Tree Fertilizer? Mycorrhiza (literally fungus roots) helps plants survive conditions of stress such as low fertility, drought, temperature extremes, and root pathogens. The fungus, Mycorrhiza, also prevents the tree's roots from absorbing forms of pollution such as heavy metals and acidification of soils. Mycorrhiza promotes an increase in xylem cell number, cell wall thickness, and lumen diameter. Studies prove that trees injected with mycorrhiza, increased photosynthesis and used water more efficiently compared to trees not injected with Mycorrhiza (Khalil & Meexal, 1998, New Mexico State University).

Tree Fertilizer Companies- Broomfield CO

Control group tree roots;
no fertilizer and no Mycorrhiza

Tree Fertilizer Companies - Westminister CO

Mycorrhiza treated tree roots

Tree Fertilizer Companies - Louisville CO

Fertilizer and Mycorrhiza
treated tree roots

What is Iron Chlorosis? Chlorosis basically means that the tree is no longer able to perform photosynthesis or create chlorophyll. Chlorosis causes the tree to slowly starve to death. The reason this is happening is usually caused by a combination of “dead soils,” improper planting (usually too deep), over watering, or other abiotic conditions.

Chlorosis tends to be more severe in poorly drained or compacted soils and by soils that have pH levels above 7.5. Oaks, maples, birches, and aspens frequently show this condition even in low pH soils while other trees will develop chlorosis in higher pH soils. The problem is compounded in sever alkaline conditions where soil pH is above 7.0 preventing the soil’s iron from becoming available for uptake by the roots. Iron is most soluble and readily absorbed by plants at a pH range of 5.0 to 6.5, which is extremely rare in Colorado soils. Chlorosis is also aggravated by cold soil temperature, compacted soils, over watering, and dead soils.

Chlorosis is usually more common in urban landscapes because residential soils are usually compact, lack organic matter, and sprinkler systems are often programmed improperly causing over watering or too frequent of watering. The trees that are most susceptible to chlorosis are typically non-native plant species like oaks and red maples. These native trees of the east coast are very sensitive to iron chlorosis and are planted without regard to existing soil conditions. The best method in the prevention and the treatment of chlorosis is with our annual organic tree fertilization applications that contain chelated iron and humate. Humate is teeming with organic matter and a natural chelating agent (convert unavailable nutrients into available nutrients for uptake by the tree).

We also strongly recommend a sprinkler audit when a tree is showing signs of chlorosis. Over watering is one of the major causes of dead soils, which exacerbates the effects of chlorosis.

Do not hesitate. Call the Boulder and Fort Collins tree care professionals today! Reach our Boulder office at (303) 499-2000 and our Fort Collins office at (970) 225-9425.

Tree and Shrub Organic Fertilization Prices*

Discounts: $5.00 off orders over $100.00, $10.00 off over $150.00, and $30.00 off over $300.00

Tree Height - Cost Per Tree

Shrubs - $4.00
5 - 10 ft - $8.00
11 - 15 ft - $14.00
16 - 20 ft - $18.00
21 - 25 ft - $22.50
26 - 30 ft - $30.00
30 - 50 ft - $35.00
50+ ft - $45.00

*$55.00 Minimum Purchase

FAQ - Tree Fertilization

Do I need to fertilize my trees?

  • Colorado has a very erratic and unpredictable weather. Fort Collins and Boulder are difficult environments for the health of a tree and all trees will benefit from organic deep root tree fertilization. The must-do trees are fall color trees such as Ashes, Birches, Maples, and Oaks, as well as young trees or stressed trees.