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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.




CSU Extension
FREE Gardening Webinars

Registration required, you will receive an email with the class link.

Wed, May 12

Common Weeds in
Front Range Landscapes

12:30pm w/Amy Lentz, Weld County


Fri, May 14

Things Mom Taught Me:
Gardening Wisdom (Or Not)

12:00pm w/ John Murgel, Douglas County


Wed, June 9

Best Of Perennials from the CSU Perennial Trials
12:30pm w/ Jim Klett, Ornamental Plant Specialist

Wed, July 14

Troubleshooting Irrigation Issues
12:30pm w/Tony Koski, Turfgrass Specialist.


Wed, August 11

Cooking with Your Harvest:
Summer Vegetables

12:30pm w/Amy Lentz & Sheila Beckley, Weld County.
Registration required:

Denver Botanic Gardens

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

The Gardens on Spring Creek Virtual Classes

2145 S Centre Ave, Ft. Collins

Sat, May 8

Just Drip It! Basics of drip irrigation
10:30am-12:30pm $5.

Sat, May 8

Composting 101
1:30-3:30pm $5.

Sat, June 19

Vegetable Gardening-Mid-Summer Must Knows
10:30am-12:30pm $10. or 970-416-2486 to register.


Harlequins Gardens Virtual Class


Sun, May 16, 10-11am

Growing Mushrooms on Logs & Stumps
with Zach Hedstrom
to register on Eventbrite.


Thurs-Sat thru June 13

Desert Canyon Farm Open Farm Days
1800+ varieties of herbs, vegetables, berries, fruit trees, perennials, edible flowers, fairy garden plants. Free workshops Covid permitting.

1270 Field Ave, Canon City.

2021 CO Native Plant Society Native Plant Sale

Visit to order now.


May 22-23

Cheyenne Mountain Zoo In-Person Plant Sale 5/22-5/23

Offering vegetables, fruits, herbs, annual hanging baskets, fruit trees.
4250 Cheyenne Mountain Zoo Rd.,
Colorado Springs


Fri-Sat, May 7-8, May 14-15, May 21-22

Horticultural Art Society (HAS) of Colorado Springs Plant Sales

5/7-5/8: Shrubs & perennials. 5/14-5/15: Perennials, shrubs, grasses. 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.


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.


Thru Sept 6

High Plains Environmental Center Online Native Plant Sale

Over 100 species! Order when you are ready to plant.  Curbside p.u. at 2698 Bluestem Willow Dr, Loveland.

May 10-11

Virtual Spring Plant Sale at Denver Botanic Gardens

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 8-9, May 15-16

Growing Gardens Greenhouse 21st Annual Community Plant Sale

8am-4pm at 1630 Hawthorne Ave, Boulder, CO  80304

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.


Sat, May 15

FROG (Front Range Organic Gardeners) Organic Victory Drive-Up Plant Market, 9 am – 1 pm, 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.

Sun, June 6

Colo. Water Garden Society
Annual Plant Sale

Members only 9-10am, general public 10am-2pm. At The Hudson Gardens & Event Center. 
or 303 423-9216

Sat, June 12

Denver Rose Society Show
“A Rose in Time”

1-4:30pm in Mitchell Hall, DBG York St. Enter roses, arrangements, rose photography for judging in many categories. No entry fees.


MASA Farm & Gardens Organic Seeds & Produce/MASA Seed Foundation
Vegetables, Fruits, Perennial Herbs, medicinal & culinary, Biennial herbs, Annual herbs, flowers, bedding plants. or Laura 303-444-9642


Sat, June 5, 12 & 26

Colorado Native Plant Society Garden Tours

6/5 in South Denver, 6/12 in Loveland/Fort Collins, 6/26 in Boulder/Longmont. Register at


Sat-Sun, June 11-12

Longmont Symphony Guild Garden Tour, 9am-3pm. Tickets available at & Then Flower Bin.

Sun, June 13

Park Hill Garden Walk


Sat, June 19

Lyons Garden Club’s first ever garden tour, “Mountain Blooms” 10am-
Tickets available through EventBrite starting May 1, 2021. Check for link.

Saturday, June 26

Gardens for the Birds Tour 8am-12:30pm. Tour 5 native gardens at the Audubon Center Public Demonstration Gardens in Roxborough/Littleton.
Timed tickets required:


Sat-Sun, June 26-27

15th Annual Parade of Ponds & Waterfalls, Monument & CO Springs, 9-5. Tickets $5, avail. June 1 at

Sat-Sun, July 17-18

Colorado Springs Garden Tour,
A midsummer stroll through the Old North End.  Tickets $25,


Sat, July 31

10th Annual Saguache
Hollyhock Fest


Self-guided tours of hollyhock,
flower & vegetable gardens of Saguache. • Facebook Page • 719 849-0240


Sat, July 31
8th Annual NoCo
Urban Homestead Tour

Tour local homesteads across
Berthoud, Loveland & Fort Collins.

M Looking at roots w microscope.jpg
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