April 27th & 28th from 9 am-4 pm—all by appointment due to parking restrictions.

A current list of plants for sale can be found one month before the sale on our website’s “Our Nursery “ page. You can also visit this page to see example lists of past plant sales.

We focus on CA native plants suited to support our local pollinators, especially butterflies & moths.
After finishing your appointment at the nursery, feel free to take a self-guided tour of the garden.

Appointments can be booked up to 90 days before sale.

April 27th & 28th from 9 am-4 pm—all by appointment due to parking restrictions.

A current list of plants for sale can be found one month before the sale on our website’s “Our Nursery “ page. You can also visit this page to see example lists of past plant sales.

We focus on CA native plants suited to support our local pollinators, especially butterflies & moths.
After finishing your appointment at the nursery, feel free to take a self-guided tour of the garden.

Appointments can be booked up to 90 days before sale.

Learn about butterflies and their habitat while tending the Gardens!

We welcome all levels of experience—garden tools are provided (you are also welcome to bring your favorites if you have them). Bring your hat, sunscreen, comfortable clothes, and drinking water.

Tasks include Invasive plant removal, pruning, propagation, seed collecting, trail maintenance & more!

For questions or to be added to our “Garden Workdays Email List” reach out to Evan, our Garden Manager. garden.hallberg@gmail.com

Did you know that over 90% of the bugs we see in the garden are actually beneficial? Inviting beneficial bugs is one of the best ways to increase the overall health of the garden, while significantly reducing the pests. In this class you will learn about who the most common beneficials are, what they're doing, and how to keep them around. This class is ideal for a gardener of any level. 

This is a free event, and registration is required.

Meet your instructor:

The environmentalist and green thumb behind Plant Harmony–Suzanne Bontempo educates gardeners, garden clubs, agencies, and private companies in the North Bay (and online) on how to grow and manage healthy homes and gardens. She began her career in the gardening industry over 25 years ago as a retail associate for a landscape supply business. Then, she worked for a women-owned landscape contractor business as a gardening consultant and in retail garden center management. Visit plantharmony.org for more information about Suzanne and her services.

What to Bring: 

• Layered clothing for cool to warm weather

• Comfortable walking shoes for uneven ground

• Water bottle (drinking water not provided)

• Sunscreen/hat

• Optional: notebook, magnifying glass, binoculars.

• Accessibility: the appropriateness of the walk and talk for children, etc.

• The garden entrance has level gravel paths, shallow potholes, and bumps (gopher activity). Gravel road transitions to narrow dirt paths, and shallow stairs navigate a moderate hillside.

• Parking: We suggest arriving 10 minutes early to get settled and use the restroom.

• Public Parking (street parking with a walk into the gardens). Please contact for accessible parking information. 

• Garden Map - click here

Learn about butterflies and their habitat while tending the Gardens!

We welcome all levels of experience—garden tools are provided (you are also welcome to bring your favorites if you have them). Bring your hat, sunscreen, comfortable clothes, and drinking water.

Tasks include Invasive plant removal, pruning, propagation, seed collecting, trail maintenance & more!

For questions or to be added to our “Garden Workdays Email List” reach out to Evan, our Garden Manager. garden.hallberg@gmail.com

Learn about butterflies and their habitat while tending the Gardens!

We welcome all levels of experience—garden tools are provided (you are also welcome to bring your favorites if you have them). Bring your hat, sunscreen, comfortable clothes, and drinking water.

Tasks include Invasive plant removal, pruning, propagation, seed collecting, trail maintenance & more!

For questions or to be added to our “Garden Workdays Email List” reach out to Evan, our Garden Manager. garden.hallberg@gmail.com

Learn about butterflies and their habitat while tending the Gardens!

We welcome all levels of experience—garden tools are provided (you are also welcome to bring your favorites if you have them). Bring your hat, sunscreen, comfortable clothes, and drinking water.

Tasks include Invasive plant removal, pruning, propagation, seed collecting, trail maintenance & more!

For questions or to be added to our “Garden Workdays Email List” reach out to Evan, our Garden Manager. garden.hallberg@gmail.com

Learn about butterflies and their habitat while tending the Gardens!

We welcome all levels of experience—garden tools are provided (you are also welcome to bring your favorites if you have them). Bring your hat, sunscreen, comfortable clothes, and drinking water.

Tasks include Invasive plant removal, pruning, propagation, seed collecting, trail maintenance & more!

For questions or to be added to our “Garden Workdays Email List” reach out to Evan, our Garden Manager. garden.hallberg@gmail.com

Learn about butterflies and their habitat while tending the Gardens!

We welcome all levels of experience—garden tools are provided (you are also welcome to bring your favorites if you have them). Bring your hat, sunscreen, comfortable clothes, and drinking water.

Tasks include Invasive plant removal, pruning, propagation, seed collecting, trail maintenance & more!

For questions or to be added to our “Garden Workdays Email List” reach out to Evan, our Garden Manager. garden.hallberg@gmail.com

Free & no appointment required! 

Join us for our 26th annual celebration and plant sale! We will have mostly native plants for sale, including several host plants (caterpillar food), Dutchman’s pipevine, milkweed, and a broad selection of seasonal nectar plants (butterfly food). Walk along our trails for bird, butterfly, and wildflower sightings with knowledgeable docents throughout the Gardens. Book sales, and activities for kids. At the historic barn, we’ll have an education center with a display of common butterfly host plants, Sonoma State University’s Entomology department’s insect display, the Xerces Society’s interactive learning materials about the conservation of pollinators, and Bird Rescue Center with their Bird Ambassadors. We hope to see you there!

Learn about butterflies and their habitat while tending the Gardens!

We welcome all levels of experience—garden tools are provided (you are also welcome to bring your favorites if you have them). Bring your hat, sunscreen, comfortable clothes, and drinking water.

Tasks include Invasive plant removal, pruning, propagation, seed collecting, trail maintenance & more!

For questions or to be added to our “Garden Workdays Email List” reach out to Evan, our Garden Manager. garden.hallberg@gmail.com

Join us for a two-day workshop exploring the world of monarch butterflies in Sonoma County! Don't miss the chance to delve into the fascinating life cycle of these incredible creatures and discover the vital role of California native milkweed. Participate in an interactive field day within Sonoma County Regional Parks, where you'll make meaningful observations for the International Monarch Monitoring Blitz and contribute to an important cause. Experience the blend of education and conservation, and leave inspired to protect these beautiful butterflies!

This event is free. Registration is required - Click here to sign up!

The International Monarch Monitoring Blitz is a call to action for individuals, organizations, and community scientists across North America to unite to conserve monarch butterflies and their dependent habitats. Participating in the Monarch Blitz entails tracking your observations of the monarch butterfly. If you encounter a monarch egg, caterpillar, and/or adult or milkweed, regardless of location, near the end of July or the beginning of August, you’re encouraged to share your observation with one of several Community Science programs. We will use INaturalist.org for the workshop, making it as easy to upload observations as it is to post on social media.

What to Bring:

• Camera (phone)

• Layered clothing for cool to warm weather

• Comfortable walking shoes for uneven ground

• Water bottle (drinking water not provided)

• Sunscreen/hat

• Optional: notebook, magnifying glass, binoculars.

Day 1 (July 12th) 10 am - 12 pm

• Location: Hallberg Butterfly Gardens 8687 Oak Grove Ave Sebastopol, CA 95472

• Description: Review the lifecycles of Monarch butterflies and California native milkweed, how to make observations on the INaturalist app or Inaturalist.org, and instructions to participate in the International Monarch Bioblitz (July 25th-August 3rd).

• Accessibility: The garden entrance has level gravel paths, shallow potholes, and bumps (gopher activity). Gravel road transitions to narrow dirt paths, and shallow stairs navigate a moderate hillside.

• Parking: Gravel lot. We suggest arriving 10 minutes early to get settled and use the restroom.

Day 2 (July 26th) 10 am - 12 pm

• Location: Crane Creek: 5000 Pressley Rd, Santa Rosa, CA 95404

• Description: Participants will meet at Crane Creek to learn about native milkweed in Sonoma County Regional Parks and record observations of native milkweed and monarch butterflies for the International Monarch Blitz (July 25th - August 3rd).

• Accessibility: The Milkweed sites involve hiking a minimum ¾ - 1 mile on park trails, which can sometimes be rocky or uneven.

• Parking: Gravel lot. We suggest arriving 10 minutes early to get settled and use the restroom.

On the first night of National Moth Week 2025, guests are invited to walk the Gardens’ trails under a waning crescent moon.

The event is not a guided tour but will be hosted by our Curator, Meghan Ashley Peterman.

After a Welcome Orientation, guests are free to come and go as they please—with the company of a Moth Night event map. Stroll the garden trails, join scheduled events, or follow Meghan as she explores! Our UV light stations typically see “the peak” of moth activity between 10 pm and 11 pm, but we understand if you leave early for bed!

Visit our Moth Night page for more information.

Join us for a two-day workshop exploring the world of monarch butterflies in Sonoma County! Don't miss the chance to delve into the fascinating life cycle of these incredible creatures and discover the vital role of California native milkweed. Participate in an interactive field day within Sonoma County Regional Parks, where you'll make meaningful observations for the International Monarch Monitoring Blitz and contribute to an important cause. Experience the blend of education and conservation, and leave inspired to protect these beautiful butterflies!

This event is free. Registration is required - Click here to sign up!

The International Monarch Monitoring Blitz is a call to action for individuals, organizations, and community scientists across North America to unite to conserve monarch butterflies and their dependent habitats. Participating in the Monarch Blitz entails tracking your observations of the monarch butterfly. If you encounter a monarch egg, caterpillar, and/or adult or milkweed, regardless of location, near the end of July or the beginning of August, you’re encouraged to share your observation with one of several Community Science programs. We will use INaturalist.org for the workshop, making it as easy to upload observations as it is to post on social media.

What to Bring:

• Camera (phone)

• Layered clothing for cool to warm weather

• Comfortable walking shoes for uneven ground

• Water bottle (drinking water not provided)

• Sunscreen/hat

• Optional: notebook, magnifying glass, binoculars.

Day 1 (July 12th) 10 am - 12 pm

• Location: Hallberg Butterfly Gardens 8687 Oak Grove Ave Sebastopol, CA 95472

• Description: Review the lifecycles of Monarch butterflies and California native milkweed, how to make observations on the INaturalist app or Inaturalist.org, and instructions to participate in the International Monarch Bioblitz (July 25th-August 3rd).

• Accessibility: The garden entrance has level gravel paths, shallow potholes, and bumps (gopher activity). Gravel road transitions to narrow dirt paths, and shallow stairs navigate a moderate hillside.

• Parking: Gravel lot. We suggest arriving 10 minutes early to get settled and use the restroom.

Day 2 (July 26th) 10 am - 12 pm

• Location: Crane Creek: 5000 Pressley Rd, Santa Rosa, CA 95404

• Description: Participants will meet at Crane Creek to learn about native milkweed in Sonoma County Regional Parks and record observations of native milkweed and monarch butterflies for the International Monarch Blitz (July 25th - August 3rd).

• Accessibility: The Milkweed sites involve hiking a minimum ¾ - 1 mile on park trails, which can sometimes be rocky or uneven.

• Parking: Gravel lot. We suggest arriving 10 minutes early to get settled and use the restroom.

Fall Plant Sale: October 3rd, 4th, 10th, & 11th from 9 am - 4 pm

By Appointment Only to help us manage parking (6 people booked per 30 minutes).

• Plant List for Fall Sale (alphabetical order)

• Nectar/Host Plant Checklist - Plants for sale listed by butterfly preference. Support a diverse landscape with blooms for all seasons, and the food caterpillars like best. (Fall List updated soon)

Take a self-guided tour of the Gardens after your plant sale appointment!

Appointments can be made up to 90 days prior to sale.

Fall Plant Sale: October 3rd, 4th & 10th, 11th from 9 am - 4 pm

By Appointment Only to help us manage parking (6 people booked per 30 minutes).

• Plants for sale will be listed on our nursery page one month before the sale

Take a self-guided tour of the Gardens after your plant sale appointment!

Fall Plant Sale: October 3rd, 4th, 10th, & 11th from 9 am - 4 pm

By Appointment Only to help us manage parking (6 people booked per 30 minutes).

• Plant List for Fall Sale (alphabetical order)

• Nectar/Host Plant Checklist - Plants for sale listed by butterfly preference. Support a diverse landscape with blooms for all seasons, and the food caterpillars like best. (Fall List updated soon)

Take a self-guided tour of the Gardens after your plant sale appointment!

Appointments can be made up to 90 days prior to sale.

Appointments can be made up to 90 days prior to sale.

Fall Plant Sale: October 3rd, 4th, 10th, & 11th from 9 am - 4 pm

By Appointment Only to help us manage parking (6 people booked per 30 minutes).

• Plant List for Fall Sale (alphabetical order)

• Nectar/Host Plant Checklist - Plants for sale listed by butterfly preference. Support a diverse landscape with blooms for all seasons, and the food caterpillars like best. (Fall List updated soon)

Take a self-guided tour of the Gardens after your plant sale appointment!

Fall Plant Sale: October 3rd, 4th, 10th, & 11th from 9 am - 4 pm

By Appointment Only to help us manage parking (6 people booked per 30 minutes).

• Plant List for Fall Sale (alphabetical order)

• Nectar/Host Plant Checklist - Plants for sale listed by butterfly preference. Support a diverse landscape with blooms for all seasons, and the food caterpillars like best. (Fall List updated soon)

Take a self-guided tour of the Gardens after your plant sale appointment!

Appointments can be made up to 90 days prior to sale.