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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.

Educational Demonstration Gardens   arrow

We support four educational public gardens across our county to demonstrate how, what, and where to plant in your home landscape or neighborhood. Tours and more information are available from the Colorado Master Gardeners in Douglas County–contact the extension office for more information.

Douglas County Fairground Gardens

Location: 410 Fairgrounds Road, Castle Rock, CO 80104; surrounding the CSU Extension office.
What you’ll find: A variety of gardens and garden plants, including herbs, cacti and succulents, Colorado natives, roses, and drought-tolerant plants for sun and shade.

Douglas County Public Gardens

Location: 301 Wilcox St, Castle Rock, CO 80104
What you’ll find: In the heart of historic downtown Castle Rock, this garden is converting traditional building landscaped areas to more xeric, native and Colorado-hardy plants in both shaded and sunny areas surrounded by sidewalks and turf grass.

Hidden Mesa Research Orchard & Demonstration Garden

Location: 3217 CO-83, Franktown, CO 80116
What you’ll find: A research orchard with fruit and nut trees, 4 high tunnels growing fruits and propagating new plants, 22 raised bed vegetable gardens, 30+ chickens used for insect management, small composting operation and various trial gardening techniques for the harsh Colorado climate.

Sedalia Museum Garden

Location: 4037-A North, Platte Ave, Sedalia, CO 80135
What you’ll find: A Plant Select(R) garden focused on drought-tolerant beautiful plants for our Colorado climate.