Plant & Insect Diagnostic Services

Arapahoe County Extension’s professional horticulture staff and advanced Colorado Master Gardener^SM 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:
Samples may be dropped off Monday through Thursday 8:00 am to 4:30 pm. 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.

Drop-Off station (in office):

• Fill out data form pre-numbered with sample number (given to client by front desk or Horticulture staff).
• Fill out appropriate worksheet. Copy sample number from data form onto worksheet (given to client by front desk or Horticulture staff).
• Give paperwork (data form, plus worksheet) to front desk (or Horticulture) staff member.
• Sample should be brought in to the office by the client in a trash bag and tied shut.
• Clients will then give the front desk the completed data form for billing.
• Client will pay front desk (or Horticulture) staff via check, credit/debit card (there is a convenience fee for credit/debit card use) or cash (exact change only to minimize handling).
• Front desk (Or Horticulture) staff will take bagged sample and paperwork and put it in the Master Gardener work area.
• Clients will be called for follow-up information.

Click here for guidelines for bringing in a sample.

Cash/Check Fees:

• Insect Identification: $8
• Diagnosis: $8
• Plant Identification: $8 first plant; $3 each additional.
• Out-of-County Surcharge (for any service): $3
  • There is an additional fee for credit card transaction.

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