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Contact Us

Address and phone information, board and staff lists.

Office Location & Mailing Address:

Tilth Alliance
4649 Sunnyside Avenue N., Suite 100
Seattle, WA 98103
Office Hours: Monday - Friday, 9 a.m.-5 p.m.

Phone Numbers

(206) 633-0451 - Main phone line with staff directory
(206) 633-0451 ext. 119 - Registration & General info
(206) 633-0224 - Garden Hotline for your gardening questions
(206) 200-2933 - Good Food Bags
(206) 633-0450 - Fax

Wallingford Office and Gardens
Bradner Gardens Park
Rainier Beach Learning Garden
Rainier Beach Urban Farm & Wetlands


General questions -
Garden-related questions - The Garden Hotline
Volunteering -

To email staff members individually, send to:

Staff Members and Phone Extensions

Tom Beck, Individual Giving and Informatics Manager, ext. 127

Isaac Bonnell, Farm Program Manager, ext. 123

Kerri Cacciata, Good Food Bags Program Manager

Dawn DeGere, Community Relations Coordinator, ext. 119

Ariel Dennis, Finance Coordinator

Tanya Fink, MS, RD

Susan Gebretsadik, Youth Education Program Coordinator, email

Chris Hoffer, Environmental Programs Manager, ext. 108

Carlin Van Holmes, Events Coordinator

Habibah James, Office Manager, ext. 101

Anna Johnson, Research & Education Associate, ext. 105

Selena Ligrano, Garden Hotline Educator

Coral Mercado, Good Food Bags Program Coordinator

Laura Matter, Garden Hotline Program Manager, ext. 110

Kevin McAleese, Communications Manager, ext. 118

Melissa McGinn, Garden Hotline Educator

Laura McGrath, Environmental Programs Coordinator, ext. 131

Erin Murphy, Statewide Education Coordinator

Ren O'Hart, Good Food Bags Program Assistant

Sam Osborne, Director of Development

Georgina Sanchez-Canaya, MS, RD, ext. 102

Omaretta Sharpley, Community Educator

Sharon Siehl, Program Director, ext. 117

Melissa Spear, Executive Director, ext. 104

Carey Thornton, Adult Education Coordinator, ext. 115

Anita Waghani, Community Education Coordinator

Cassie Whitebread, MC/SS Program Coordinator, (206) 633-0097

Board of Directors

To email board members individually, email:

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