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.




Betty Ford Alpine Gardens Workshops in Vail
Thurs Sept 2, 10:30-noon:

Conservation and Plant Pressing Workshop"

Thurs Sept 16, 10:30-noon:

Putting Your Garden to Bed to purchase tickets.


Echter’s Garden Center Fall Classes

9170 W 52nd Ave, Arvada

No preregistration necessary

Sat, Sept 4  10-11am:

Landscaping Your Colorado Garden
w/ trees, shrubs & perennials that grow well in our region.  Create curb appeal & enhance outdoor living spaces.  2-3pm  Tips & Techniques for Planting Success w/ trees, shrubs, perennials. 

Sun, Sept 5   2-3pm

Planting Fall Bulbs
Discover new varieties of tulips, daffodils and other bulbs.  Prepare your soil and maintain years of beauty.

Sat, Sept 11   10-11am:

Wine Making for Gardeners
A simple, no-chemical or sulfite method using fruits, vegetables, flowers, herbs from your garden, w/ Richard Bender, author of Wild Wine Making.

2-3pm  Growing Great Garlic

Fall is best for planting. Best varieties, preparing the planting area, harvest, storing, culinary tips.

Sun,  Sept 12 2-3pm

Bird Feeding Through the Seasons

Tips & techniques for creating habitat.

Sat, Sept 18  10-11am:

Gardening in the Fall

2-3pm: Harvesting & Preserving Herbs

Sat, Sept 25  10-11am:

Jams & Jellies from the Garden

w/ nurseryman Keith Williamson who knows the realm of fruit bearing plants. 

2-3pm: Orchids – Exotic but Easy


Harlequins Gardens Fall Classes

4795 North 26th St, Boulder

Visit for our current offerings and to sign up. (303) 939-9403.


Sat, Sept 18

Rocky Mountain African Violet Council Show & Sale

9am -1pm.

Cherry Creek Presbyterian Church, 10150 Belleview Ave, Greenwood Village.

Fri & Sat, Sept 24 & 25

Denver Botanic Gardens Fall Plant & Bulb Sale

909 York St, Denver, 9am-6pm.  Members Only Hour: Fri 8-9am.

Free Admission, Reservations Required.

See for more details


Sat, Sept 11  

CoNPS (CO Native Plant Society) 45th Annual Conference

In-person or virtual

Trinidad State Junior College

Rare Plant Symposium Sept 10, Field Trips Sept 12

Register at

Sat, Sept 25

Jared’s Nursery 16th Annual Giant Pumpkin Weigh-off


10500 W Bowles Ave, Littleton, 303 979-6022

SAVE THE DATE! Sat, Feb 26, 2022

7th Annual Landscaping with Native Plants Conference

A virtual event, registration opens  early December 2021., Keynote speaker Doug Tallemy, author of Bringing Nature Home & Nature’s Best Hope.