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Pro Knowledge

Best Practices help industry professionals avoid missteps and operate collectively for the greater good of our industry and our state.

GreenCO Best Management Practices (BMPs), are guidelines on how to reduce water consumption and protect water quality while producing, designing, installing and maintaining healthy, beautiful landscapes. The current BMPs as well as information on BMP Training can be found on the GreenCO website.  Additional water related information is available at the GreenCO website.

These materials were developed by GreenCO members in cooperation with Colorado State University Cooperative Extension, Denver Water, Northern Colorado Water Conservancy District and Wright Water Engineers. 

2014 Colorado State University Perennial Flower Trial Garden Report

The 2014 CSU Perennial Flower Trial Garden Report is available for download.  Over 157 varieties of perennials from 14 companies were evaluated for their performance in the High Plains and Rocky Mountain Region. To read the full report click here. To view the 2014 top performers and read their reviews, click here.

2014 Colorado State University Annual Flower Trial Garden Performance Report

Colorado State University has released their Annual Flower Trial Garden Performance Report. The research was conducted at the Annual Flower Trial Garden next to the University Center for the Arts. In 2014, over 1000 varieties of annuals were evaluated for their performance in the High Plains and Rocky Mountain Region. Click here to view pictures and read descriptions of the 2014 "Best of" Annuals.The full report can be found by clicking here.

Managing Emerald Ash Borer: Decision Guide and 'How to Assess Your Tree' Video

Emerald Ash Borer (EAB) was found in Boulder in September 2013. As of April of 2014 additional infestations have not been identified. To help keep the spread of this pest to a minimum, knowing if there are Ash trees on properties and watching for changes in the health of the tree are vital since this invasive pest cannot be visually detected in the early stages of its presence. This guide is provided as a resource for you and your customers to help minimize the spread, keep trees that are valuable to the owner viable, and know what treatment options are available. Other resources can be found at  

Colorado State Extension has produced a short video that gives homeowners an easy to understand assessment process for identifying the presence of Emerald Ash Borer. The 4 minute video covers basic diagnostics from properly identifying the ash tree to annual evaluations of crown thinning and dieback to proper identification of EAB exit holes. Watch the video.

Alternatives to Ash

Emerald ash borer is responsible for the loss of tens of millions of Fraxinus, wreaking havoc on boulevards and growing fields alike. But a broad selection of shade trees is available, ready to serve as suitable substitutes. Read More 

Layers of Intrigue: Physocarpus and Powdery Mildew

Commercial cultivars of eastern ninebark vary widely in susceptibility to fungal pathogens. In a study conducted at the University of Connecticut, evaluation of popular selections showed which plants are relatively resistant to powdery mildew and which are prone to infection.  Read More 


GreenCO Legislative Affairs

2014 Legislative Policy Priorities 

2013 Legislative Session Report 

Colorado Nursery Act

The glossary is provided to facilitate a clear understanding of terminology between the Colorado Measurement Standards Section and the green industry.

Japanese Beetle Update

January 14, 2014

Japanese beetle (Popillia japonica) has been located in several Western counties in Nebraska:  

First positive NAPIS data entry for the county

Pest Status Description: POSITIVE (PRESENT)


Observation date: 10/22/2013 NE - Box Butte County (borders Wyoming)

Observation date: 10/22/2013 NE - Burt County

Observation date: 10/22/2013 NE - Cheyenne County (borders Colorado)

Observation date: 10/22/2013 NE - Custer County

Observation date: 10/22/2013 NE - Polk County

Observation date: 10/22/2013 NE - Scotts Bluff County (borders Wyoming)

View the CAPS Survey Map. 

Japanese Beetle Quarantine Implementation

Colorado’s Japanese beetle (Popillia japonica) Quarantine has been in effect since January 1, 2010. How will the quarantine be enforced? What is required of Colorado’s nursery growers, producers and landscapers?

Front Range Tree Recommendation List©

The Front Range Tree Recommendation List© was developed through the collaborative efforts of 12 individuals, three from each of the four participating professional groups: the American Society of Landscape Architects (ASLA), the Colorado Nursery & Greenhouse Association (CNGA), municipal arborists representing the Colorado Tree Coalition (CTC), and the Colorado State University (CSU) Extension. Based on the committee’s collective education, knowledge, and experience more than 250 trees or varieties were evaluated and rated, resulting in a single reference list for professionals to use and share with their customers or residents. View and download the List.

GreenCO Tree Planting Recommendations

This recommendation, presented by a GreenCO committee in February 2012, is the result of collaborative work by industry professionals representing the Colorado Nursery & Greenhouse Association (CNGA), municipal arborists/Colorado Tree Coalition (CTC), American Society of Landscape Architects-Colorado (ASLA-CO), Associated Landscape Contractors of Colorado (ALCC), and Colorado State University (CSU).

The purpose of the project was to create a single recommendation for green industry professionals that was based on respected sources and decades of hands-on experience by professionals involved in the growing, siting, installation, and care of trees. Current research in addition to the experiences of those on the committee was used in the development of the recommendation. The collective intent was to ensure the best possible outcome for the planting of trees in the landscape.

To view, download and print the GreenCO Tree Planting Recommendations, click here.

Container Labeling

Colorado Standards for Container Labeling
Glossary of Weights and Measures Terms

National Standards for Container Marketing - This document was developed through a collaborative effort between industry representatives and Colorado Measurement Standards Section, the agency responsible for Colorado inspections. For those buying products outside Colorado, it is recommended that you advise them of the Colorado requirements. Educational enforcement will begin January 2007. State inspectors call on businesses selling green goods to learn more about the industry, evaluate, and assist the companies toward full compliance. Calculating Pot Volume - The part of a right circular cone between the base and a plane parallel to the base whose distance from the base is less than the height of the cone.

Height: h 
Radius of bases: r, R 
Volume = ð * h (R2+rR+r2) / 3