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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 Adams County Extension
2023 Spring Vegetable Garden Series
9755 Henderson Rd, Brighton
Sat 10-noon, $25 + fee
Jan 28: Intro to Vegetable Gardening
Feb 25: Vegetable Varieties
March 25: Container Gardening
When you register, you can attend all 3 classes
Register at
​CSU Extension Free Gardening Webinars
Free online classes from CSU Extension, Wednesdays 12-1. Register at
Feb 8: Seed Starting
March 8: Cold Hardy Cacti & Succulents
April 2: Tremendous Tomatoes
Also available on the website, recorded gardening webinars from 2022 & 2021.
Cheyenne Botanic Gardens
710 Lions Park Dr., Cheyenne, WY 82001
Tues Feb 14: 7-8:30 pm Romance & Roses Floral Arrangement Class $50 per couple
Sat March 4: 10 am, Terrarium Workshop, $50 includes all materials
Info:, 307-637-5458
Colorado Native Plant Society

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

Native Seed Planting Event hosted by CoNPS and Wild Ones

Wed Jan 17 • 6-8pm

Colorado Springs Horticulture Complex
1003 Glen Ave, Colorado Springs, CO 80905

Free-to-the-public* Native Seed Planting EventBring containers so you can take your planted seeds home! Milk jugs are best. Soil and seeds (donated at the 2022 Pikes Peak Region Seed Share) will be provided. This method of winter sowing also works well for cool season veggies like chard, spinach, onions, kale, cabbage, etc.
*Register at:

Bath Garden Center

1200 East Prospect Rd, Fort Collins, 970-484-5022,

Sat, Jan 21

10-12, Houseplant Plant Painting class; 13+, $35.

Sat, Jan 28

10-11, Fairy Garden class, $40.

Denver Botanic Gardens 

1007 York St, Denver

New Gardener Boot Camp

Onsite: Sat, March 11 9am

Online: Sat, March 22

Learn about garden planning, soils, beginning vegetable gardening annuals & perennials and more. 

$80; $60 members

See for details plus complete class listings, registration information & fees. 

Denver Urban Gardens 

1031 33rd St, Denver,, 303-292-9900

Sat, Feb 25

10-12, How to Start Seeds Indoors

Sat, March 18

10-12, Garden Planning Intensive Workshop

Classes are pay-what-you-can; $30 suggested fee.

Echter's Garden Center
5150 Garrison St, Arvada, CO
Classes on Saturdays; free, no registration required
March 4-Early Bird Gardening
10-11 Summer Bulbs
1-2 Starting Plants from Seed
3-4 The Secret Life of Soil
March 11-Get Your Grow On
10-11 Starting a Lawn from Seed
1-2 This Herb's for You
3-4 Early Spring Punch List
March 18-Gardening Inside & Outdoors
10-11 Orchids-Easier Than You Think
1-2 Turf Maintenance Through the Year
3-4 Trees & Shrubs for Colorado Gardens
Details at 303-4214-7979
The Flower Bin

1805 Nelson Rd, Longmont; 303-772-3454

Spring Begins at the Flower Bin

March 18-19

See for details.

Fort Collins Nursery

2121 E. Mulberry St, Fort Collins, 80524; 970-482-1984

Winter Workshops

Each workshop is $18 and requires tickets at

Sat, Jan 14

9:30-11, New Waterwise Plants for Colo's Changing Climate

12-1:30, Landscape Design: Creating Peace, Balance & Harmony

2:30-4, Japanese Beetle-resistant Landscapes

Sun, Jan 15

12:30-2, The Art & Science of Espalier

3-4:40, Backyard Composting 101

Sat, Jan 21

2:30-4, Beginning Seed Saving, Selection & Crop Adaptation

Sun, Jan 22

12:30-2, Accessible Gardening

3-4:30, Growing Medicinal Plants

The Gardens on Spring Creek
2145 Centre Ave, Fort Collins
Check or 970-416-2486 to register; all classes on Saturdays, unless otherwise noted.
Jan 21

1:30-3:30, Perennial Propagation; $18.

Feb 4

1:30-3:30, Seeing Soil: Agroecology  & Medicinal Gardens; $20.

Feb 11

1:30-3:30, Japanese Beetle & Emerald Ash Borer: What you need to know; $10 virtual, $18 in person.

Feb 18

1:30-3:30, Seeds & Medicinal Plant Science: Agroecology & Medicinal Gardens; $25.

Feb 25

10:30-12:30, Let's Grow Great Tomatoes & Peppers! $10 virtual; $18 in person.

March 11

10:30-11:30, Composting 101; $18 in person.

1:30-3:30, Vegetable Gardening in Low Water Conditions; $10 virtual.

March 18

1:30-3:30, Wasps! $10 virtual; $18 in person.

March 25

10:30-12:30, Grow Your Own Veggies; $10 virtual, $18 in person.

1:30-3:30, Easy-on-the-Back Raised Bed Gardening; $10 virtual, $18 in person.

Grain School Online 2023 

University of Colo at Colo Spgs.

3 courses; $150 each or $400 for all 3

Online modules with live online sessions; some experiential sessions at UCCS

Feb 2-24, Farming & Processing

March 2-31, Health & Nutrition

April 6-28, Community

Register: Grain School 2023

Harlequin's Gardens 

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

Watch for the reopening in March.

High Plains Environmental Center 

2698 Bluestem Willow Dr., Loveland 80538, 970-622-9676,,

Sat, Jan 21

9:30-11, Sustainable Landscaping Strategies; online class with HPEC Director Jim Tolstrup. Free; registration required.

Sign up for the enewsletter to learn about other classes & special events.

Phelan Gardens

4955 Austin Bluffs Parkway, Colo Springs 80918; 970-560-5486.


Sat, Jan 28

1:00, Colorado Kokedama; $35.

Sun, Jan 29

1:30, Kids! Succulent Garden; $20.

Sat, March 11

1:00, Beginning Composting; $10.

Fri, March 24

10:00, Meet the Natives of El Paso County; $10.

Pine Lane Nursery

718200 Apache Dr, Parker; 303-841-3009

The full lineup of spring events will be posted soon:

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

Xeriscape Classes with Craig Miller, Sat, 11-12:30

Jan 14, The Basics of Xeriscape

Jan 21, Principles of Xeriscape Design

Jan 28, Principles of Soil Preparation

Feb 4, Turf & Plant Selection

Feb 11, Irrigation & Mulch

Feb 18, Maintenance

Classes are free, no registration required. Details at Sign up for the newsletter for info about other classes & special events.

The Windsor Gardener (& Brewery) Classes

6461 Colorado Hwy 392, Windsor, CO

Ticket information and registration at

Jan 20 6-7pm Sipping with Succulents
Evening class, $50.
Feb 11 10:30am Sweethearts & Seltzers
21+ event; plant a heart planter, $50.
Feb 18 10-12 Gardening 101, $10.
Feb 24 6-7pm, Toddies & Terrariums
21+ event; $80.
March 3 6pm Knotty Night Out
Make a macrame plant hanger; 21+; $50.


Jan 12-Feb 20, Denver Botanic Gardens Orchid Showcase

1007 York St, Denver

Orchid Show and Sale. Info: Orchid Showcase

Feb 4-12, Colorado Garden & Home Show

Colorado Convention Center, Denver

Weekends: Sat, 10-6; Sun, 10-5

Weekdays 12-6

Find inspiration with the latest ideas & trends in landscaping, gardening & home improvement. Tix $8-10. info at; 303-932-8100

Sat, Feb 25 - 8th Annual Landscaping with Native Plants Conference

"Native Landscapes for Climate Resilience" - Registration Now Open. Keynote Speaker - Dr David Inouye


Sat, Feb 25 - High Plains Arboretum Plant Sale
Cheyenne Botanic Gardens
710 Lions Park Dr., Cheyenne, WY 82001
Members 10-noon; public noon-2
Orders taken for shrubs, trees, and vegetable seeds cultivated and/or tested at the High Plains Arboretum. Pickup plants in May. Info:, 307-637-5458
Wed, March 1 - Fri March 31- Envisioning a Changing DurangoScape Conference
Presented by Durango Botanic Gardens
Virtually March 1-31: Watch, listen, learn on your own schedule.
In person March 16 at the Durango Public Library.
This conference offers practical approaches to adapting yards & landscapes to a changing climate. Guest presenter is Panayoti Kelaidis from the Denver Botanic Gardens.
Members $60; nonmembers $75.
Details & registration info:
Sat, March 4 - High Plains Landscape Workshop
Presented by Fort Collins Nursery
Drake Centre, 802 Drake Rd, Fort Collins 80526
This workshop is an educational opportunity for inspiring smart home garden design. Hosted by The Gardens on Spring Creek in partnership with the City of Fort Collins Utilities & CSU Extension. Tix on sale Jan. 17; info at, 970-416-2486.
Fri, March 10 - 9th Annual Tree Diversity Conference
Presented by Denver Botanic Gardens & The University of Denver Chester M Alter Arboretum
Denver Botanic Gardens, 1007 York St., Denver, 720-865-3500.
8:30-3 pm--online & in-person options available.
The 9th annual conference explores the relationship between landscape design, horticultural practices & the use of a greater variety of tree species.
$25-$95 for students, public or DBG & CTC membership.
Registration details & speaker bios at
Fri, March 10 - Sun, March 19 - Great Grow Along
Virtual Gardening Festival
Free 10-day online gardening festival featuring 40 workshops on gardening topics like small space gardening, seeds & soil, native gardening for wildlife landscaping, & more. Details at
Fri, March 17- Sat, March 18 - Sun, Soil, Water, Ag Summit

CSU Extension Pueblo & Pueblo Food Project

Summit includes a Pitch Competition, Leadership Awards, Community Lead Summit, Makers' Market and Idea Fair.
Tix $10-25. For info: 

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