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Plant & Insect Diagnostic Services   arrow

Plant & Insect Diagnostic Services

Arapahoe County Extension’s professional horticulture staff and advanced Colorado Master GardenerSM volunteers provide sample analysis for a small fee to help homeowners, commercial growers, crop consultants, and golf course crews. Our sample analysis can help you to:

  • Identify causes of plant, turf, tree and shrub problems
  • Diagnose diseases or pest problems
  • Find safe and effective control measures
  • Receive information on pesticide alternatives or non-chemical controls

How it Works:
Please contact us at 303-730-1920 for a description of how to collect and deliver the plant or insect sample. Samples may be dropped off anytime from 8 am until 4:30 pm, Monday through Friday. Turf samples not accepted October – April. Horticulture staff will complete the analysis, confirm results and ensure that you are contacted with up-to-date research-based information on each sample.

Click here for guidelines for bringing in a sample.


  • Insect Identification: $7
  • Diagnosis: $7
  • Plant Identification: $7 first plant; $3 each additional.
  • Out-of-County Surcharge (for any service): $3

No-one shall be denied the opportunity to participate or receive information based on their ability to pay. Fees are subject to change.

More: CSU Extension Soil, Water and Plant Testing Lab

Keeping ahead of COVID-19

This rapidly evolving coronavirus (COVID-19) has imposed an unsettling, fluid situation upon our community and its businesses. While the team here still aims to maintain a “business as usual” approach, we are making a number of significant changes to our operations to account for a situation that is far from normal.