Regional Groups
Regional Horticultural Therapy Groups are locally led entities that play a vital role in strengthening the field, creating community, and leading the path forward.
Regional Groups collaborate with the AHTA to advocate for horticultural therapy within their communities.
Regional Groups focus on connecting everyone doing horticultural therapy in their area like practitioners, students, allied professionals, and supporters alike.
These groups host educational events, create networking opportunities, share resources, and mentor emerging professionals.

Why Join a Regional Group?
Regional groups are an ideal complement to your AHTA membership, connecting with other horticultural therapy professionals in your area to exchange ideas, participate in group events, and build meaningful professional relationships close to home.
Connect with Thought Leaders & Mentors
Moving beyond casual networking to access high-level mentorship and industry leaders.
Pool Regional Resources & Local Expertise
Accessing a localized brain trust and operational toolkits.
Drive Current Initiatives
Actively participating in the immediate momentum of the profession.
Peer Support Built for Your Market
True peer-to-peer collaboration with people who understand your specific challenges.
Learn from Proven Program Highlights
Using successful local case studies as blueprints for growth.
Find a Regional Group Near You
Browse the directory below to connect with local horticultural therapy professionals, discover nearby events, and access regional insights.

California Horticultural Therapy Network
- Location: California (CA)
- Contacts:
- North: Trish Hildinger
- South: Silvia Yoshimizu-Yee
- Emails:
- trishsgarden@earthlink.net
- smyoshimizu@gmail.com

Carolinas Horticultural Therapy Network
- Location: North Carolina (NC), South Carolina (SC), and Tennessee (TN)
- Contact: Greg Stivland
- Email: carolinashtnetwork@gmail.com

Florida Horticulture for Health Network
- Location: Florida (FL)
- Contact: Lesley Fleming
- Email: FLHort4Health@outlook.com

Michigan Horticultural Therapy Association
- Location: Michigan (MI), Ohio (OH), Indiana (IN), Wisconsin (WI), Minnesota (MN), and Illinois (IL)
- Contact: Angie Girdham
- Email: Angie@MichiganHTA.org

Mid-Atlantic Horticultural Therapy Network (MAHTN)
- Location: New Jersey (NJ), New York (NY), and Pennsylvania (PA)
- Contact: Gerry Sherman
- Email: info@mahtn.org

Northeast Horticultural Therapy Network
- Location: Connecticut (CT), Massachusetts (MA), Maine (ME), New Hampshire (NH), New York (NY), Rhode Island (RI), and Vermont (VT)
- Contact: Irene Brady Barber
- Email: irenebarber@nehorticulturaltherapy.net

Northwest Therapeutic Horticulture Networking Group (NWTH)
- Location: Idaho (ID), Montana (MT), Oregon (OR), and Washington (WA)
- Contact: nwtherapeutichorticulture@gmail.com

Rocky Mountain Horticultural Therapy Network
- Location: Colorado (CO), Idaho (ID), Montana (MT), New Mexico (NM), Utah (UT), and Wyoming (WY)
- Contact: Erica Wharton
- Email: programdirector@lovelandyouthgardeners.org
Regional Groups Guidelines
National standards inspire us, but local networks empower us.
The AHTA proudly encourages and supports the vital work of our Regional Groups. We look forward to seeing these communities flourish, expand, and drive impact across the country.
While Regional Groups passionately champion the AHTA mission, they operate under a distinct framework. To maintain clarity and alignment, all groups adhere to the following guidelines and criteria:
- Independence: Groups operate as independent entities with no legal or business affiliation with the AHTA.
- Autonomy: The AHTA does not oversee, monitor, or manage Regional Group memberships.
- Leadership: The designated group contact must maintain an active professional membership with the AHTA.
- Branding & Identity: Groups may not use the AHTA name or logo without prior permission. Additionally, groups without designated nonprofit status will be identified strictly by their region or state.
- Website Visibility: The AHTA will feature your group’s name and contact information directly on the official AHTA website.
- Event Amplification: The AHTA will promote your networking events on the official Calendar of Events and share updates across our social media platforms.


Join a Regional Group Event
Each Regional Group hosts events, like webinars, community meetings, and more. Most events are featured on AHTA’s event calendar.
Did you know the Regional Groups will be represented at the AHTA Annual Conference?
Don't miss a chance to connect with a group near you or gather more information while enjoying everything the conference has to offer.

