Colorado Gardener Calendar

Flower Bin Garden Store in Longmont, CO

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




High Plains Env. Center Online Native Plant Sale
Now through September 5

Place online order for native wildflowers & grasses; pick up at 2698 Bluestem Willow Dr., Loveland 80538.

Fort Collins Nursery Sales
Fri-Sun, June 17-19 & Fri-Sun, July 16-24

Father's Day Tree Sale, 6/17-19: Fri-Sat 9-5pm; Sun 10-5pm. 7/16-24: Summer Perennial Sale, Fri-Sat 9-5pm; Sun 10-5pm. 2121 E. Mulberry, Fort Collins., 970-482-1984.

                    JUNE WORKSHOPS & CLASSES
CSU Extension Free Gardening Webinars

Below are the FREE online classes available from CSU Extension. Register:

All classes held noon-1:00 pm.

Thurs, June 23 - Beauty & the Bees

Denver Botanic Gardens classes

(visit for complete class & event schedule)

1007 York St, Denver

Denver Urban Gardens 

1325 Colorado Blvd, Denver

Through Oct. 8 - Learn to Compost (Free)

Sponsored by City & Cnty of Denver & DUG, composting and vermicomposting classes. See schedule & register at DUG

Echter's Garden Center
5150 Garrison St, Arvada, CO
Check the website for classes & special events:

Harlequin's Gardens & Sustainable Nursery

4795 N. 26th St., Boulder, 303-939-9403

Visit for details. Most classes held at Boulder Circus Center, 4747 N. 26th St. $20 per person unless otherwise noted. Pre-registration is 72 hours before the class; members get 50% discount. 

High Plains Environmental Center 

Check to register & see full schedule with trail &
bird walks.

Lyon's Farmette

4121 Ute Hwy, Lyons, 303-746-6266

Register for classes:

Northern Water w/ Resource Central

Waterwise Landscape Webinar Series

Recorded webinars are free. For details, visit:

Penn & Cord's Garden Classes in Westcliffe

Beginning in May. Check for schedule.

Rocky Mt Seed Alliance Online Classes

Details:, 970-560-5486.

Ongoing - Seed School 101 & Grain School 101

Tagawa Gardens

7711 S. Parker Rd., Centennial; 303-690-4722.

Sign up for the newsletter to get info on online & in-person classes, plus special events:

The Windsor Gardener (& Brewery) Classes

6461 Colorado Hwy 392, Windsor, CO

Upcoming classes & resources at


Colorado Native Plant Society

Ongoing May-September 

Sign up for workshops, webinars, conferences, field trips & presentations about CO native plants, habitats & gardening. See event calendar:

11th Annual Colorado Lavender Festival

Fri-Sun, June 24-26 9-4:00pm

Three days of lavender-themed events in and around Palisade. Tours, festival, classes & more. Details & to buy tickets in advance:

DBG Lavender Festival at Chatfield Farms

Sat-Sun, July 16 & 17. 9-4:00pm

Purchase required timed tickets in advance; member presale on June 3 at 10am. General public tickets on sale June 6 at 10 am. No onsite ticket sales. Chatfield Farms, 8500 W. Deer Creek Canyon Rd, Littleton 80128. 720-865-3500.

Global Steppe Symposium (online)

Wed-Thur, July 27 & 28

Presented by Denver Botanic Gardens. Attend one or both days. Details: Global Steppe Symposium


CO Native Plant Society Garden Tours
Sat, June 4, 11, 25, 9-5pm

6/4 Longmont, 6/11 Denver, 6/25 Fort Collins. Tickets $25-45. Tour details: conps.or

18th Annual Boulder Garden Tour

Sat, June 25, 9-2pm
(Whittier-Mapleton) Self-guided walking tour of private gardens in Flatirons/Uni Hill neighborhoods. Benefits local nonprofit Garden to Table.
Glenwood Springs Garden Club Tour
Sat, June 25, 9-3pm
Welcome to Our Gardens self-guided tour of 8 varied gardens. $20 in advance; $25 day of. Details: 505-716-1354.

Greeley Garden Tour

Sat, June 25, 8-2pm
Greeley Morning Garden Club's tour of 5 local gardens. Tickets ($15 + service fee):
Purely Ponds 16th Annual Parade of Ponds/Waterfalls
Sat-Sun, June 25-26, 9-5pm
Self-guided tour to benefit local charities sponsored by Purely Ponds Fine Landscapes, Colo. Springs:
Kitchen/Garden Tour in Steamboat Springs area
Sat, July 9, 9-5pm
Beautiful kitchens & amazing gardens at 5 homes, with local musicians. Benefits Strings Music Festival. Tickets: $50 or $90 VIP w/bus & lunch: 
Colo. Springs Garden Tour
Sat-Sun, July 9-10, 9-3pm
From Ashes to Beauty: A decade of recovery from the Waldo Canyon Fire. Sponsored by Friends of Extension, El Paso Cnty. Self-guided tour of Mountain Shadow & Rockrimmon neighborhoods. Tickets: $25 beginning May 15.
CO Water Garden Society Pond Tour & Picnic
Sat, July 16, 10-5pm
Self-guided tours in southwest Denver; free & open to the public. Picnic 5-7pm (fee).
Evergreen Garden Club High Altitude Garden Tour
Sat, July 16, 9am check in
Tour includes 6 garden to support 9 Evergreen public gardens. Tickets $20:
9th Annual NoCo Urban Homestead Tour
Sat, July 30
Featuring seven local homesteads in Fort Collins, Loveland, and Windsor demonstrating self-sustaining lifestyles that include growing your own produce, raising bees and backyard animals, season extension, food preservation, re-purposing materials and much more. Tickets on sale now -