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Welcome to the CSU Extension Office in Douglas County. Our goal is to assist you with any questions you may have whether it is about gardening, wildlife, 4-H or any other needs.

Horticulture Show at the Douglas County Fair   arrow

2025 Douglas County Fair & Rodeo Agriculture & Floriculture Open Class Details

Every year, CSU Extension partners with the Douglas County Fair & Rodeo for a county wide agriculture and floriculture open class contest!

Join us this year to enter your best natural resources, with items like Honey and Eggs, to Vegetable Art and Artistic Arrangements, all the way to Fairy Gardens and endless varieties of Flowers and House Plants.

2025 Douglas County Fair & Rodeo Agriculture and Floriculture Open Class Exhibit Entry Times:

  • Wednesday, July 30 @ 5:00-8:00pm
  • Thursday, July 31, @7:00am-11:30am

At the Douglas County Fairgrounds, James R. Sullivan Event Center, 500 Fairgrounds Road, Castle Rock, Co.

Find more information on competition requirements and regulations on the Douglas County Fair & Rodeo Website.

Whether you’re a seasoned gardener or a new green thumb, we await your entry this year. Use the resources within CSU Extension to start growing your open class competitors. Volunteers are available regularly to assist you with questions you have about horticulture topics and would be thrilled to help those excited about growing for the open class contests.

Find our Douglas County Colorado Master Gardener Help Desk hours, here. Volunteers are waiting for your questions related to horticulture through email, phone, or in-person (during the growing season).

  • Email CMG Volunteers: DCMgardenR@gmail.com
  • Call CMG Volunteers: 720-733-6935

We are looking forward to growing together this season!