Lawn Disease Diagnosis


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Lawn Disease Diagnosis

Lawn Diseases in Colorado

Lawn Disease Diagnosis Grass diseases in Colorado are a common problem, but they are usually a symptom of a problem in a lawn that is caused by humans. Believe it or not 99% of lawn fungus problems are caused by improper watering and improper lawn care cultural practices.

Most Common Lawn Fungus Problems Found in Boulder and Fort Collins

Necrotic Ring Spot Lawn Fungus (NRS) for example is a severe lawn disease that is a symptom of dead soils. Necrotic Ring Spot fungus is caused by severe over watering of a lawn for a long very period of time. The over watering of the lawn typically is over a period of months. This common lawn fungus takes a long time to correct because the cure for Necrotic Ring Spot is to repair the beneficial microbial activity in the soil. Necrotic Ring Spot is commonly found in lawns with sprinkler systems.

Ascochyta Leaf Blight Fungus is a minor lawn fungus that is commonly found in Colorado lawns that have shallow digging grass roots. Dollar Spot Disease is another name for Ascochyta Leaf Blight and these shallow grass roots are typically caused by shallow and frequent lawn watering. Ascochyta Leaf Blight is one of the common lawn diseases in Colorado.

Other Lawn Problems In Boulder and Fort Collins

Insect pressure and lawn diseases are always a symptom of a bigger problem with the lawn care practices. Proper identification of the insect pressure, fungus or lawn problem is the first step in recovery. Many times a lawn will have a brown spot that the homeowner might think is a lawn fungus or a lawn insect, but it is often just poor sprinkler coverage.

Lawn Diseases in Colorado

Organo-Lawn is a firm believer that if the lawn problem is not a lawn fungus and is only suffering from a watering problem. We will only recommend that the problem can be corrected with a sprinkler audit, and we will NOT sell our customer unnecessary services such as fungicide applications or unnecessary insecticide applications.

If the lawn problem is actually a lawn disease we will start by properly identifying the lawn disease and our lawn care experts will explain to our customer what is causing the lawn disease. Our professional lawn care technician will then make recommendations and changes to the lawn care practices to correct the cause of the lawn problem. If proper corrections are made then the lawn fungus problem will not return in the future.

All our lawn care technicians that perform disease diagnosis' are done by a highly trained and often state licensed lawn care expert. He or she will closely inspect the lawn and give an analysis of your lawn's overall health and potential, evaluate any damaged or problem areas and make recommendations to repair the lawn problem and prevent the lawn care problem from returning in the future.

The most common grass diseases in Colorado, especially the Boulder, Arvada, and Fort Collins areas, are necrotic ring spot fungus (too much water) or ascochyta leaf blight fungus (short roots). You can read more about these common Colorado grass diseases and what is causing them to occur by clicking on the links or calling our offices in Boulder (303) 499-2000 or Fort Collins (970) 225-9425.

What is included in a professinal lawn care evaluation from Organo-Lawn:
  1. Identification of the Predominant Grass Type
  2. Identification of Problem Grasses
    a. Controllable-i.e.Crabgrass, Foxtail, Barnyard Grass
    b. Uncontrollable- i.e. Tall Fescue, Bentgrass
  3. Measurement of the Thatch Level
  4. Weed Identification
    a. Dandelion, Clover, Kosha, Mallow, Plantain, Thistle, Bindweed, Spurge, Oxalis, Wild Violet, etc.
  5. Measurement of Mowing Height
  6. Effectiveness ofLawn Watering
  7. Composition of Soil
  8. Measurement of Grass Root Depth
  9. Lawn Disease or Fungus Identification
    a. Lawn Disease or Fungus Management Recommendations
  10. Insect Identification
    a. Insect Management Recommendations
  11. Special Circumstances
    a. Drainage, Bare Spots, Sunlight, Hills, Traffic, etc.
  12. Lawn’s Present Condition
  13. Lawn's Potential
  14. Specific Recommendations of the Licensed Professional


As soon as possible after the problem is noticed.

Grass Diseases in Colorado

Grass diseases and lawn fungus problems are often difficult to diagnose properly. Never apply any lawn fungicides or lawn insecticides to your lawn prior to having a professional lawn care expert examine your lawn. Applying lawn fungicides or lawn insecticide can cause the lawn disease to worsen.

FAQ - Disease Diagnosis

What is the most common lawn disease in Colorado?

  • The lawn disease that is most commonly found in lawns around Boulder and Fort Collins Colorado is called Necrotic Ring Spot Fungus (NRS). NRS is a clear sign that the lawn has been severely over watered for many months. Typically the most damaging lawn fungus problems like Necrotic Ring Spot are caused by severe over watering of a lawn. Due to the hot and dry climate of Colorado many homeowners and even professional lawn care companies think that a lawn needs to be watered every day. Daily lawn watering is a terrible lawn care cultural practice and we recommend following the 1, 2, 3, 2, 1 watering technique.

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