Tree Seedling Giveaway
Thank you to everyone for joining the city during Arbor Day weekend, getting a free tree seedling and native plant, and commemorating Boulder’s 43rd year as a Tree City USA and for the seventh year, a Tree City of the World.
Best Vegetables for Colorado, with Mimi Yanus
Enhance your gardening success by planting the right veggie at the right time. Mimi will walk you through the gardening season, identifying what crops to grow when, and what varieties grow well in the Boulder area – everything from Arugula to Zucchini!
Spring Regeneration Fest
A family-friendly day of festivities centered around Health & Wellness, Education & Play, and Food & Soil.
Best Fruit Trees for Colorado, with Mikl Brawner
Learn which varieties of fruit trees are successful here, which are not successful, and which have great flavor – Apples, Cherries, Plums, Pears, & Peaches. Mikl’s first orchard was in 1976, and he will teach you how to care for your fruit trees.
Drought, Nature & Fire Preparedness
Join Wild Bear & special guests Tyler Asnicar from the Department of Natural Resources as we discuss what this year’s drought will bring and how to keep yourself and your community safe.
Earth Day Eve, Stand Up for Climate Comedy!
Join the University of Colorado, Boulder for the 11th annual Stand Up for Climate Comedy event celebrating the power of comedy to ignite climate awareness and action. Hosted at Boulder Theater.
Waterwise Yard Seminars | Fire Resilient Landscaping
Learn how to design defensible space around your home using fire-resistant plants, smart material choices, and landscape layout strategies. This session covers practical steps for reducing wildfire risk while maintaining an attractive, climate-appropriate yard.
Landscape Contractor Training
Join The City of Boulder in partnership with Wildfire Partners, PACE, and CSU Extension for a full-day training aimed at helping landscape professionals deliver climate-resilient, wildfire-aware, and water-wise landscapes.
2026 Zonta Foothills Climate Justice Forum
Hear from an inspiring panel of experts on how their work helps us understand the effects of climate change on women, girls, families, and our community. Meet leaders from local nonprofits and other organizations to learn more about ways to make a difference!
Butterfly Monitoring Training - Eldorado Canyon
Join the Colorado Butterfly Monitoring Network (CBMN) and the Monarch Larvae Monitoring Project (MLMP) for in person trainings on how to contribute to community science by monitoring butterflies.
Making a Living and a Life; ALL Careers as “Environmental Careers"
The ALL Careers approach connects environmental and energy understanding to every career path — not just the small subset traditionally labeled as “environmental or green careers.” The goal is to inspire and equip young people with the knowledge that environmental principles are relevant in every field.
Why Private Land Conservation Matters
Tony Caligiuri, President of Colorado Open Lands (COI), will introduce the audience to COI’s work to protect landscapes and our beloved wildlife on private lands across Colorado.
Photo of Sandhill Cranes in field, by Tony Caligiuri
How Flowers Made Our World
Join author David George Haskell in this online webinar discussing the many ways that we live on a floral planet.
Creating Habitat in Yards, Containers, and Other Tiny Spaces
Learn how you can support pollinators even if you are limited by space in this online webinar.
Agrivoltaics Webinar: Fire Safety Within Your Panels
Join the Colorado Agrivoltaic Learning Center and friends for a discussion on how to properly manage fire safety within your array!
The Biodiversity Crisis is Urgent - the Solution is in Your Hands
Join KISS Native Plants with panel experts from The Butterfly Pavilion and People and Pollinators Action Network (PPAN) for an informative film and Q&A about how you can improve biodiversity by planting native plants.
Butterfly Monitoring Training - Chatfield State Park
Join the Colorado Butterfly Monitoring Network (CBMN) and the Monarch Larvae Monitoring Project (MLMP) for in person trainings on how to contribute to community science by monitoring butterflies.
Butterfly Monitoring Training - Cheyenne Mountain
Join the Colorado Butterfly Monitoring Network (CBMN) and the Monarch Larvae Monitoring Project (MLMP) for in person trainings on how to contribute to community science by monitoring butterflies.
Butterfly Monitoring Training - Jackson Lake State Park
Join the Colorado Butterfly Monitoring Network (CBMN) and the Monarch Larvae Monitoring Project (MLMP) for in person trainings on how to contribute to community science by monitoring butterflies.
12th Annual Bee Boulder Festival
Please join Cool Boulder and Boulder Parks and Rec for the 12th Annual Bee Boulder Festival on Saturday, September 19, 2026 - from 10:00 a.m. - 2:00 p.m. in Boulder’s downtown Central Park (next door to the Boulder Farmers Market on 13th Street)!
This year's Bee Boulder Festival will once again feature two performances by Jeff & Paige along with guided kids’ arts and crafts activities (carried over from last year!) and interaction with nearly 40 local organizations that provide important support for pollinators, biodiversity and the environment - and will inspire you with new ideas for how you too can create positive impact!
The Bee Boulder Festival coincides with the Boulder Farmers Market located just East of the Bee Boulder Festival so you can make the most of a fall Saturday, while learning how your actions can support pollinators, biodiversity and the environment!
The Cool Boulder campaign focuses on mobilizing community members around nature-based climate solutions, which includes the regeneration of local soils, trees and habitats.
We will be seeking volunteers for this event so please check back if you are interested!
Waterwise Yard Seminars | Waterwise Design Principles and Plant Selection
Learn how to design a successful low-water garden using foundational landscape design principles and thoughtful plant selection.
Nature Journaling for Kids
We will read the book Henry Hikes to Fitchburg by D.B. Johnson and then create our own nature journal so that we can observe nature around us as spring turns into summer.
Seeds: Cleaning with City of Boulder 2
Volunteers will work on seeds collected on Boulder OSMP lands at the WRV headquarters in Longmont. The seeds have dried at the OSMP offices and we need your help to prepare them for restoration projects.
Restoration in Action: How Communities Heal Ecosystems
Kevin Shuck, WRV Director of Programming, will explore the vital role of volunteer-powered conservation using WRV’s 25+ years of work as a lens to understand ecological challenges and solutions.
Master Gardeners Series: Garden Planning and Prepping for Spring
Get your garden ready for the season! Join CSU Extension Boulder County Master Gardners volunteers to learn simple tips for planning your space, choosing the right plants, and tackling key early-sprint tasks to set your garden up for success. Perfect for beginners and seasoned gardeners alike.
Learn to Grow Your Own Fruit Trees
This workshop will equip you with the skills to select and plant fruit trees, manage tree’s water and nutrient needs, build resilience to pests and diseases, and create a welcoming environment for beneficial insects.
Spring Phenology at Rabbit Mountain with Dr. Paul Alaback
Join Dr. Paul Alaback on this field trip to Rabbit Mountain to learn about early Spring wildflowers around Boulder County.
April Cool Weather Plant Sale
Join Growing Gardens during their Cool Weather Plant Sale! Stock up on all of your early Spring gardening needs.
The Basics of Fruit Tree Production
Jeff Pieper from Mesa County Extension will discuss production methods for apple, peaches, and cherries, including site selection, rootstock selection, scion selection, pruning and training, thinning, IPM, and harvest.
Waterwise Yard Seminars | Insects in the Garden: Beneficial vs. Harmful Species
Explore Colorado’s rich diversity of bees, beetles, wasps, and other arthropods. Learn to identify beneficial insects, manage common pests, and understand the ecological roles these species play in supporting healthy, balanced garden ecosystems.
Mountain Pine Beetle Learning Hour
Join the St. Vrain Forest Health Partnership for a presentation from Dr. Dan West on bark beetles like the mountain pine beetle.
Spaceship Earth Multimedia Presentation Boulder Arts Week!
Celebrate the 56th Anniversary of Earth Day with this multimedia presentation exploring how we can play a part in creating more sustainable communities.
Seed Cleaning with the City of Boulder (1)
Help clean native seeds collected by volunteers with the City of Boulder!
Spring Pruning, with Mikl Brawner
Learn how to identify and prune plants that are best pruned in the spring to foster strength, beauty, and fruit flower production.
Forest Gardening, with Amy Scanes-Wolfe
Learn about the practice of using forest ecology to design self-renewing landscapes that support biodiversity and provide food/ medicine (forest gardening) with Amy Scanes-Wolfe.
Boulder County Nature Association 2026 Ecosymposium- Public Lands in Public Hands for the Public Good: Engaging law, policy, and advocacy to protect our shared natural heritage.
Join local BCAS conservation partner Boulder County Nature Association for their annual ecosymposium. This year’s theme is especially relevant to the unprecedented pressures our public lands are experiencing.
Understanding Front Range Soils
What: A good soil is truly the key to successful gardening. What is soil, let alone good soil for plant growth? Learn the characteristics of our Front Range soils and what can and cannot be done to improve them. Compare landscape soils with native or agricultural soils. Discussion focuses on soil texture, structure, pore space, pH, fertility and testing to deepen your understanding of soil. The importance of the living component of soils, adding organic matter and composting is emphasized.
Details:
This event costs $34 for Denver Botanic Gardens members, and $40 for non-members
Registration required
This course fulfills a requirement for the Rocky Mountain Gardening certificate program
When: Friday, April 3 9:30-11:30 AM
Where: Denver Botanic Gardens at York Stret
Out in Nature: Food Gardening Basics (LGBTQIA2+)
Get your hands in the soil and learn how to grow your own food on this hike geared towards the LGBTQIAS2+ community.
CO Climate Day at Limelight with CU Boulder | Opening Session with Chancellor Justin Schwartz
On Wednesday, April 1, CU Boulder will be the locational host of Colorado Climate Week, hosting a series of speakers, panels, breakouts and exciting climate-related events at the Limelight Hotel.
Shared Spaces: Turn Your Yard into a Habitat Garden
Join veteran naturalist and native plant gardener Dave Sutherland and award-winning field naturalist, Ux in a talk about how you can maximize your garden’s beauty while increasing benefits to the larger ecosystem.
Fourmile Community Action Fair!
Fourmile neighbors are invited to an interactive open-house designed to build momentum and shape the future of community resilience in the canyon.
Drip Irrigation for Home Gardeners
Join Growing Gardens for a morning learning about all things drip irrigation for your home garden.
Garden Planning and Design for Produce, Planet and Pollinators
This Growing Gardens workshop is an opportunity for new and experienced gardeners alike to explore design for their home gardens and landscapes with a focus on planting for pollinators, using home landscapes for food production, water-conscious design, and climate-resilient landscapes.
Waterwise Yard Seminars | High and Drier: Creating Drought-Resilient Gardens
Join Laura Swain of Denver Botanic Gardens to learn future-forward horticultural practices, climate-adapted plant choices, and ecosystem-based strategies that reduce water use, support soil health, and increase urban landscape resilience.
Falcons…Streamlined for Speed
Join wildlife photographer and conservation educator Perry Conway for a talk about the natural history and evolution of six North American falcon species, accompanied by stunning photos.
Edible Native Plants of Colorado Webinar
Join PPAN on March 19th at 12pm via Zoom to discover how Colorado’s native plants can nourish both people and pollinators!
Understanding Bloom Timing: Phenology & Biodiversity for Colorado Landscapes
Discover how observing bloom timing can help you understand climate patterns, support pollinators, and improve garden management.
Boulder Youth Volunteer Day
Join Growing Gardens Boulder Farm for a farm tour followed by guided fieldwork!
Building Soil Fertility
Mikl will discuss how to support soil life, enrich poor soils, and improve plant health and nutrition from the bottom up: composts, fertilizers, mulching, worms, deficiencies, and tilth.