Weed barrier, wood chips, straw, fine gravel, bark — which mulches should be used and where? Why is mulching so important? What’s wrong with redwood and cedar? Mikl will discuss these questions and suggest solutions for your gardens.

Mini plant swap and garden crawl. Boulder. Bring plants to swap and a bag lunch.  Come tour Kristine’s yard to see what she’s working on and what’s blooming.  Fair number of penstemons, rain garden, crazy amount of composting. We can talk propagation as well! Registration required.

Join the City of Boulder for a volunteer cleanup of the Goose Creek Greenway!

Step inside the Plantmobile for an engaging look at eco-friendly landscaping and the powerful role native pollinators play in creating resilient, thriving gardens. Hosted by CSU Extension Boulder County Master Gardener volunteers. Free start plant giveaways!

Learn how to look for and identify common pests, and how to judge if anything needs to be done. Learn which organic solutions are the most effective, for what, and how to do it. Mikl has been walking this talk for 35 years!

Join Jack’s Solar Garden and People and Pollinators Action Network for a day of pollinator learning and fun!

Join naturalist Dave Sutherland on a gentle, moon lit journey with a selection of classical music inspired by the moon.

Bring plants to swap and a bag lunch.  Come tour Zoe’s yard to see what they’re working on and what’s blooming.

Plant lovers unite! Drop-in to the Reynolds Library anytime between 12-1:30 p.m. and bring plants, propagations, or clippings to swap or trade with members of your community.

Self-guided tour of private gardens - now in north Boulder! In support of local school garden organization, Garden to Table.

Join the Colorado Pollinator Network and over 20 nonprofits for bug walks, crafty activities, and learning all about pollinators for the Colorado Pollinator Month finale event at Denver Botanic Gardens.

Learn how to have a healthy lawn without herbicides, pesticides, fungicides and chemical fertilizers. Meadows and ground covers will also be discussed.

Join Community Fruit Rescue and Benevolence Orchard & Gardens for our Summertime Fruit Tree Care Workshop on June 20th, 2026!

Learn about opportunities, challenges, and surprises that you’ll face as your pollinator garden comes of age and asserts itself.

 In this hands-on workshop, participants will learn how to make curtido, a delicious probiotic-rich fermented dish from El Salvador known for supporting digestion and overall wellness.  We’ll explore how simple, ancestral food practices can restore balance in the body while preparing curtido together from fresh ingredients.

Remember catching fireflies as a kid? That blinking glow is quietly fading. In this webinar, we'll dive into the fascinating world of fireflies: their biology, their language of light, and the threats putting them at risk. Whether you have a backyard, a balcony, or just a love of the natural world, you'll discover how you can help these luminous creatures thrive for generations to come.

Bring your little ones on an exciting adventure this summer! Meadow Music, Boulder's award-winning environmental education concert series is back!

Join the Museum of Boulder for a special tour of MASA Seed Foundation, a Boulder-based nonprofit working to preserve regional food heritage through sustainable seed cultivation, education, and community agriculture.

Curious about bringing native plants into your landscape but not sure where and how to get started? Join Wild Ones Front Range chapter and Harlequin’s Gardens for this practical primer on how to select, plant, and grow native plants to improve ecological diversity and climate resilience while you create a beautiful landscape.

Join Martin Ogle to explore this new view of humanity as experienced through the pastures and woodlands near Coal Creek, Three Leaf Farm, and more! 

Attend this free webinar to learn about common weeds you might find in your landscape!

Wise gardeners are creating their landscapes and gardens to be water-wise. With the current drought watch, knowing which plants are best is a good start.

Wise gardeners are creating their landscapes and gardens to be water-wise.

Explore permaculture as a nature-inspired approach to designing resilient, regenerative systems in this free, Intro to Permaculture workshop!

Join us for Resource Central’s Spring Plant Sale on Saturday, June 6, to shop thousands of individual waterwise plants and veggie starts from the Garden In A Box program, plus browse reclaimed yard tools, landscaping stone, and more. Save water, money, and materials, all at one fun community event! 

Right Here, Right Now Global Youth Summit student focused eco-imagination and climate storytelling session.

Step into Boulder’s ponderosa pine forest as an outdoor classroom and uncover the story behind today’s wildfire challenges.

Discover how to grow your own food, no backyard required. In this hands-on workshop, you’ll learn simple, practical techniques for creating a thriving garden in small spaces like windowsills, patios, or balconies.

Learn how to turn kitchen scraps and yard waste into biologically rich compost that fuels soil health.