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The CSU Extension office in Broomfield City & County provides assistance and programs for citizens in the areas of Horticulture: Yard & Garden

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What’s New, Broomfield!

Broomfield County Extension collaborates with businesses, organizations, and other counties to extend the reach of programming. Check out new  programs and opportunities.

Bio Art by Tarah Rhoda


Science Meets Series 

CSU Extension invites you to explore the fascinating world of BioArt on Oct. 26 at the Broomfield Auditorium. Artists Tarah Rhoda and Darya Warner will discuss their creations and share the biological materials and processes that inspire their art.

The event is free, thanks to a Broomfield Arts, Culture and Science grant. No registration required.

Close-up of Japanese Beetles on yellow rose

Japanese Beetle Survey

What do Japanese Beetles like to munch on in this region? CSU Extension is enlisting the help of local, knowledgeable gardeners to find out.

If you’ve observed Japanese Beetles in Broomfield, use this quick-and-painless online form to report the botanic names of plants they love AND, more importantly, plants they seem to ignore or mostly ignore.

The information will be used to compile a region-specific list of  susceptible and resistant plants.

CMG recruiting artwork

Broomfield Master Gardener Training

The next Colorado Master Gardener training session beginning in January 2022 is full.  To be added to the interest list for future training, please send an email to the Broomfield Master Gardener Coordinator.

For more information on the Colorado Master Gardener program, visit the CMG website.

4-H girl

Broomfield 4-H

Interested in joining 4-H in Broomfield? The group is accepting new members and is open to anyone ages 8-18 for 4-H, and ages 5-8 for Cloverbuds.

Broomfield projects range from archery and rocketry to showing fancy poultry, gardening, and scrapbooking. For more information, email

Home-preserved jams

Online Cottage Food Safety Training

Are you interested in producing food items from a home kitchen to sell to the public? If so, the Colorado Cottage Foods Act requires you to complete a food safety training course. CSU Extension offers online training that meets this requirement and (upon passing) provides you with a certificate of training valid for three years. 

Online courses will be offered statewide on the following dates (click on date to register):

Registration is $40 (plus fee).

Colorado Master Gardener logoSubmit a Question

Ask a Master Gardener!

Broomfield Master Gardeners are available year-round to answer horticulture-related questions. Send an email to, call the helpline at 303.464.5554, or submit your question using this form

You may also consult this list of local Horticulture FAQs, which is organized by season.

kids doing chemistry experimentLearn More

Join the AmeriCorps Team in Broomfield!

Calling all current and future educators, scientists, makers, and more! Broomfield is looking for a CSU Extension 4-H STEM AmeriCorps member for the 2021-2022 service year, which begins in August. AmeriCorps members make an impact with hands-on STEM programs for Broomfield youth. Receive a living stipend, loan forbearance, plus an education award upon completing 900 service hours.

Apply or learn more here. For questions, contact Sarah Schweig.

Fertilizing LawnWatch Video

Residential Lawn Care

If you missed it in real time, you can watch a recording of this GREEN series class taught by Sarah Schweig, Broomfield County Extension Director & Horticulture Agent.
Grow & Give graphicMore Information

Learn, Grow, Share!

Grow and Give is a modern victory garden project with an Extension twist. Started in 2020 to make a local impact on food security, Grow and Give connects backyard and community gardens with food donation sites across the state.

CSU Extension’s Grow and Give website offers a TON of great gardening resources in English and Spanish. Be sure to check it out!

Register your garden to join the Grow and Give community and log your donations to friends, family and neighbors.

Looking for a place to donate? Visit the Grow & Give website to find a site near you – there are two in the Broomfield area!

Tomato plants in planter

Container Vegetable Gardening

Did you miss it in real time? Watch a recording of this class taught by Sarah Schweig, Broomfield County Extension Director & Horticulture Agent.

Bee House

Native Bee Watch

Check out the new native bee house recently installed at Broomfield’s demonstration garden! If you’re interested in helping monitor the bee population in Broomfield, read more about CSU Extension’s Native Bee Watch program.

seed starting collage



View Recording

Virtual Seed Starting Class

You may have missed it in real time, but you can watch a recording of this class taught by Sarah Schweig, Broomfield County Extension Director & Horticulture Agent. Topics include supplies, timing, and techniques for starting vegetables and annual flowers indoors. 

webinar graphicLearn More

FREE Gardening Webinars

CSU Extension offers gardening webinars presented by horticulture experts from across the state. Visit the CO-Horts Blog website for topics, dates, registration links, and recordings of previous classes!

Money management icon

Money Management Basics

Learn to stretch your money through these free online workshops offered by Broomfield FISH in conjunction with the City and County of Broomfield and CSU Extension.

Check back for the next financial literacy workshop dates!

Variety of vegetablesMás información

¡Recursos Nuevos en Español!

CSU Extension’s statewide horticulture team is working hard to offer more gardening resources in Spanish, including videos, numerous publications, and an in-depth Colorado Vegetable Guide. An English version of the guide also is available.

Hands holding seedling in soil
Submit a Question

Need Gardening Advice?

Broomfield Master Gardeners are available year-round to answer your horticulture-related questions. Call the helpline at 303.464.5554, send an email to,  or submit your question using this form

Centennial Outreach by Americorps Volunteer at Broomfield LibraryView Video

Watch our AmeriCorps Team in Action

CSU Extension’s dedicated AmeriCorps members created and distributed more than 650 take-and-make STEM kits to Broomfield area children in the second half of 2020. This effort included a stop at Centennial Elementary in partnership with Community Food Share and the Broomfield Library. Team member Diamila Konate, pictured left, helped hand out STEM kits and free books. Watch this video to learn more about this community outreach effort.

Didn’t receive a kit? No problem! Most of the kits can be recreated using common household items. You can follow along with these instructions.

Drawing of STEM toolsLearn More

Making a Difference in Broomfield!

CSU Extension now has three AmeriCorps service members working out of its Broomfield office. These important team members develop and deliver STEM programs in out-of-school settings to local students.

Broomfield Library Entrance

Our Location

Broomfield County Extension is located in the Broomfield Library. We are open Monday through Thursday from 9 a.m. to 1 p.m., with live horticulture help on Tuesdays and Thursdays. To request a specific appointment time, email

A group of students learning how to make a birdhouse

Look what we made!

CSU Extension Broomfield and CSU Extension 4-H STEM specialists joined staff from Broomfield Library and Broomfield Open Space and Trails in a full-day outreach event at Centennial Elementary School on Jan. 24. Students built and decorated bird houses, learned the basics of birding, and contributed their bird sightings to the Broomfield Naturalists citizen science project.