Colorado Gardener Calendar

Find out about the latest Colorado gardening classes, events, and plant sales here. We will update this page regularly with new events or cancellations.





Colorado Native Plant Society. Sat, 3/27: CoNPS Webinar – Gardening with Native Plants Series – Native Plant Propagation: How to Garden with More than Plants from Nurseries!

CSU Extension Gardening Webinars. Wed, April 14: Tree Planting, 12:30pm w/ Alison O’Connor, Larimer County Ext.  Wed, May 12: Common Weeds in Front Range Landscapes, 12:30pm, Amy Lentz, Weld County Ext. Registration required:
You will receive an email with the
class link.

CSU Ext. Native Plant Master Program Offerings: Most in-person programs have been cancelled.  More info: or call 303-271-6625.

Denver Botanic Gardens. Check website for class listings & fees. 1007 York St, Denver. Registration: or 720 865-3500.

Denver Rose Society Free Pruning Demonstration & Rose Education, Sun, April 25, 9:30-12:30 at Jefferson County Detention Center, 200 Jefferson County Pkw, Golden.

Denver Urban Gardens Online Classes. Visit Denver

Echter’s Garden Center. Classes & events will resume as safety permits. More info:  (303) 424-7979. 5150 Garrison St, Arvada. 

The Gardens on Spring Creek Classes Online. 3/27: Season Extension for Veggie Gardens, 10:30am-12:30pm;  Scents-ible Planting, 1:30-3:30 pm. 4/10: Growing Vegetables I Small Spaces, 10:30am-12:30pm; Botany for Gardeners, 1:30-3:30pm.  4/17: Uncommon & Underused Perennials, 10:30am-12:30pm; Planting for Pollinators, 1:30-3:30pm; Converting Your Irrigation System – Turf to Drip, 1:30-3:30pm.  4/24: Homemade Lotion Bars. 10:30am-12:30pm; Shrubs – Enhancing Your Landscape, 1:30-3:30pm. or 970 416-2486 to register. 2145 S Centre Ave, Ft. Collins.


Growing Gardens Greenhouse Classes Online.  Gardening 101; Fruit Trees for the Front Range; Garden Planning & Design: Perennial Gardens & Home Landscape; Garden Planning & Design: Fruits & Vegetables; Honeybees 101; Canning & Preserving; Pickling & Fermentation; Family Cooking – Cinco de Mayo. Register at:, (303) 443-9952.

Harlequin’s Gardens Sustainable Nursery Classes Online.

3/7,1 PM: Mason Beekeeping.

3/14, 1 PM: Mason Beekeeping.

3/16, 6 PM: Worm Magic.

3/18, 7 PM: Getting Started in Vegetable Gardening.

3/22, 7 PM: Intro to Permaculture.

3/27, 10 AM: Getting Started in Vegetable Gardening.

3/30, 6 PM: Successful High Altitude Gardening.

4/3, 10 AM: Succession Gardening.

4/6, 6 PM: Permaculture for Small Spaces.

4/8, 6 PM: Developing High Diversity Native Gardens with Seed.

4/17, 10 AM: Getting Started in Vegetable Gardening.

4/18, 10 AM: The Food Forest.

4/ 25, 10 AM: Foraging for Rocky Mt Mushrooms of CO.

5/16, 10 AM: Growing Mushrooms on Logs & Stumps. Sign up at 4795 26th St, N. Boulder. (303) 939-9403. 


Hudson Gardens.  Check for events and online classes: 6115 S. Santa Fe Drive, Littleton 80120. 


Jared’s Nursery. Check for classes & events. 10500 W Bowles Ave, Littleton. 303 979-6022. 

Tagawa Gardens. Check for virtual learning opportunities. 7711 S Parker Rd, Centennial, 303 690-4722.


2021 CO Native Plant Society Native Plant Sale. Visit to order now.

March 27-April 4

Fort Collins Nursery’s Perennial Palooza 50% Off Sale. 
2121 E. Mulberry St, 80524., 970 482-1984.

April 1-26, May 22-23

Cheyenne Mountain Zoo Annual Plant Sale Online. 4/1-4/26 for p.u. 4/30-5/2. Offering many varieties of grasses, perennials, shrubs, vines, & fruit trees! 

In Person Plant Sale, 5/22-5/23. Offering vegetables, fruits, herbs, annual hanging baskets, fruit trees. 4250 Cheyenne Mountain Zoo Rd., Colorado Springs. (No shipping or delivery available)


Fri-Sat, April 30-May 1,
May 7-8, May 14-15, May 21-22

Horticultural Art Society (HAS) of Colorado Springs Plant Sales. 4/30-5/1: Clematis, peonies, groundcovers, perennials, herbs, strawberries & vegetables from Gulley Greenhouse. 5/7-5/8: Shrubs & perennials from Fort Collins Wholesale Nursery, Perennial Favorites (Colorado City), High Country Roses, LaPorte Conifers. 5/14-5/15: Perennials, shrubs, grasses from Little Valley Wholesale, specialty & rock garden plants from two Pueblo growers, herbs from Canon City. 5/21-5/22: Tomatoes, peppers, perennials, herbs, vegetables from local growers. All sales 9-4 at HAS Cottage, 224 Mesa Rd/Glen Ave, Monument Valley Park, Colorado Springs.


April 5- sellout

High Plains Environmental Center Online Native Plant Sale. Over 100 species! Orders begin April 5 at Curbside p.u. at 2698 Bluestem Willow Dr, Loveland, CO  80538.


April 17

Heirloom Tomato Plant Sale in Denver. Online seedling Pre-Sale starts 4/17.

April 26-29, May 10-11


Virtual Spring Plant Sale at Denver Botanic Gardens. 4/26 – Early Access for best selection, ticket required. 4/27-4/29 – Open to all, no ticket required. Garden in a Bag collections available. 10% Member Discount. In-Person Sale of remaining inventory May 10-11. Reservations required. Full details at 1007 York St. Denver. 

Sat & Sun, May 1-2,
May 8-9, May 15-16

Growing Gardens Greenhouse 21st Annual Community Plant Sale. 8am-4pm at 1630 Hawthorne Ave, Boulder, CO  80304

Tues, May 4 – Mon, May 16

Gardens at Spring Creek Online Spring Plant Sale. Member presale Opens 5/4. Public Sale opens 5/6 at noon. Curbside pick-ups May 12-22.


Sat, May 8

Happy Transplants Garden Club 21st Annual Plant Sale, 9am-2pm or sellout. Perennials, annuals, vegetables, herbs. Rain Date – Sat, May 15. Vectra Bank Parking Lot, 72nd Ave & Irving, Westminster. 

Denver Master Gardener Annual Plant Sale Check their website for date and details –
or call 720 913-5270

Sat, May 15

FROG (Front Range Organic Gardeners) Organic Victory Drive-Up Plant Market, 9am – 1pm, Location TBD. or email for reminders & info

Sat, May 22

North American Rock Garden Society Rocky Mt Chapter Annual Spring Plant Sale (Members only this year – good time to join) at Apex Garden, Arvada.


Sat, April 10
Sat -Thurs,
April 10-June 13

Desert Canyon Farm Open Farm Days:, 9am-4pm. 1800+ varieties of herbs, heirloom/heritage vegetables, berries & fruit trees, native, wildlife-friendly & unique perennials, edible flowers, fairy garden plants & more! Free weekend workshops, Covid permitting. For listings & Info:
1270 Field Ave, Canon City.

Sat,  April 10

Pikes Peak Herb Fest, 10am-2pm at Westside Community Center, 1604 S Cascade Ave, CO Springs. Free Community Event! Herbalists, educational speakers, holistic vendors, seed swap, door prizes.

Sat, April 17

Denver Rose Society. 2021 SymROSEium. Presented virtually via GoToWebinar, REGISTRATION REQUIRED. Guest Speakers: Panayoti Kelaidis – “Roses Around the World”; Roger Heins, Former VP at Jackson & Perkins® Roses – “Companion Planting with Roses”; David Ingram, DRS Master Rosarian – “2021 New Roses for the Rocky Mt Region.”  

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Celebrating our 25th Year of Publishing Colorado Gardener!

Colorado Gardener is an independently owned, creatively designed tabloid-size gardening news magazine. We provide our readers with the ideas, information, resources, inspiration and sense of humor needed to grow ornamental and edible plants successfully in our fast changing, unpredictable climate. We emphasize waterwise and environmentally sound practices.

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