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Certification Guidlines
Certification Guidelines for Colorado Certified Growers and Grower Entry Growers
Grower Entry Program
Certifying your own seed under the Grower Entry Program
New Seed Law Testing Requirements and Protocol
June 11, 2019 PVY Workshop
PVY Workshop presentations listed below:
Dr. Stewart Gray
Dr. Russell Groves
Dr. Nina Zidack pages 1-9
Dr. Nina Zidack pages 10-19
Dr. Nina Zidack pages 20-29
Dr. Nina Zidack pages 30-40
ET and Degree Days
For the latest recorded message, call 754-3494 extension 138 for La Jara, x140 (Center), and x136 (Center #2). Use the crop maturity and planting date closest to your own. If you would like to receive a daily ET email, please call Laura at 7544-3496 ext. 110 to be added to the daily ET email list.
ET LaJara
ET Center 1
ET Center 2
Columbia Root Knot Nematode DDs Hooper
Rules and Regulations:
Being a certified seed grower is voluntary. Seed growers agree to abide by Certification Rules and Regulations in order to qualify seed potato lots within their farming operations as certified seed. Current Rules and Regulations for certification are under review. If you have questions, please contact Andrew Houser, Potato Seed Certification Manager, at andrew.houser@colostate.edu.
2026 Rules and Regulations
Certified Growers:
This list contains contact information for Colorado certified seed growers. Please contact any grower to discuss their seed potato program and varieties they produce.
2026 CERTIFIED GROWERS
Colorado Seed Potato Act Import Requirements:
The Colorado Seed Potato Act dictates certain requirements for seed lots coming into the state. This tool helps to explain disease tolerances and additional testing required of seed lots for various situations.
Colorado Seed Act Requirements for Importing Seed into the State of Colorado 2019
USA Acreage:
Late Blight Protocol:
The Colorado San Luis Valley has established a Late Blight Quarantine on all potatoes shipped into the valley. This document details testing protocols needed prior to shipping. This quarantine is overseen by the Colorado Department of Agriculture.
Download the Late Blight Protocol >>
PCS Links
Find additional links of interest pertaining to seed potato certification. Clicking on any of the links navigates away from the PCS website.
PCS Resource Links >>
Managing PVY and It’s Effects On Seed Yield & Quality
MANAGING PVY IN NORKOTAH SEED-
Steps to growing Norkotah Seed. Clicking on any of the links navigates away from the PCS website.
Download PVYNorkSeed >>