EIN 91-0613583

Arboretum Foundation

IRS 501(c) type
Num. employees
Year formed
Most recent tax filings
The Arboretum Foundation promotes, protects and enhances the Washington Park Arboretum for current and future generations by strengthening and building a diverse and engaged community of donors, volunteers and advocates.
Total revenues
Total expenses
Total assets
Num. employees

Program areas at Arboretum Foundation

Capital projects: the Foundation granted funds to the university of Washington botanic gardens and to the city of seattle for clean-up, plantings, removal of invasive plants, and general beautification on lake Washington boulevard near the recently completed Arboretum loop trail. The Foundation also granted funds to the university of Washington botanic gardens toward a new multi year project to renovate the rhododendron glen collection of the Arboretum. The Foundation also granted funds to the city of seattle for restoration of the central section of the pond at the seattle japanese garden. Other smaller projects were also undertaken.
Education: the Foundation exists primarily to support the Washington park Arboretum and programs occurring within the Arboretum. To this end, the Foundation provides volunteer opportunities, educational materials and funds for the k-12 programs that are run by the university of Washington botanic gardens. The majority of educational offerings were suspended or moved to virtual format during march-june due to the global covid-19 pandemic.
Maintenance: the Foundation made its regular annual grant for Arboretum maintenance and renewal to the university of Washington botanic gardens to support the arborist program and the pacific connections gardener. Other maintenance expenditures are made when needed. Due to the global covid-19 pandemic, the Arboretum ensured maintenance support through additional funding to the unviersity of Washington botanic gardens for maintenance support. The abroretum saw an increase in use during the pandemic as outdoor activity was a safer option for individuals looking for recreational activities.
More than 600 volunteers donated 8,000 hours of work, the equivalent of 4 full-time employees, to the Foundation during this fiscal year. The Foundation hires staff to coordinate the volunteer stewards program for pacific connections and azalea way. Foundation staff oversee the volunteer run plant donations nursery and the pat calvert greenhouse which have programs to provide ongoing education and skills training in horticulture. Foundation staff also coordinate a full slate of programming at the japanese garden and Foundation volunteer unit 86 provides docents to the japanese garden.

Grants made by Arboretum Foundation

GranteeGrant descriptionAmount
Student Conservation Association (SCA)Lake Washington Beautification$15,000

Who funds Arboretum Foundation

Grants from foundations and other nonprofits
Aldarra FoundationArborist Program$275,000
Schwab Charitable FundEnvironmental and Animals$51,375
American Online Giving FoundationGeneral Support$28,025
...and 24 more grants received totalling $451,460

Personnel at Arboretum Foundation

Jane StonecipherExecutive Director$145,100
Gary WortzelDirector of Finance$64,030
Lee BennerDevelopment Director
Niall DunneCommunications Manager and Bulletin Editor
Tess ForteEvents and Corporate Sponsorship Manager / Events Manager
...and 10 more key personnel

Financials for Arboretum Foundation

RevenuesFYE 06/2020
Total grants, contributions, etc.$1,080,063
Program services$210,729
Investment income and dividends$70,817
Tax-exempt bond proceeds$0
Royalty revenue$0
Net rental income$0
Net gain from sale of non-inventory assets$160,909
Net income from fundraising events$25,236
Net income from gaming activities$0
Net income from sales of inventory$59,604
Miscellaneous revenues$0
Total revenues$1,607,358

Form 990s for Arboretum Foundation

Fiscal year endingDate received by IRSFormPDF link
2021-062022-07-11990View PDF
2020-062021-05-11990View PDF
2019-062020-10-16990View PDF
2018-062019-05-14990View PDF
2017-062018-06-14990View PDF
...and 7 more Form 990s
Data update history
August 3, 2022
Received grants
Identified 12 new grant, including a grant for $15,000 from Seattle Foundation
September 22, 2021
Received grants
Identified 4 new grant, including a grant for $28,025 from American Online Giving Foundation
August 21, 2021
Posted financials
Added Form 990 for fiscal year 2019
July 3, 2021
Posted financials
Added Form 990 for fiscal year 2020
June 27, 2021
Updated personnel
Identified 5 new personnel
Nonprofit Types
Grantmaking organizationsEnvironmental organizationsCharities
Funds one specific organizationProvides grantsConducts researchLobbyingFundraising eventsState / local levelEndowed supportCommunity engagement / volunteeringGala fundraisersTax deductible donations
General information
2300 Arboretum Dr East
Seattle, WA 98112
Metro area
Seattle-Tacoma-Bellevue, WA
King County, WA
Website URL
(206) 325-4510
Facebook page
Twitter profile
IRS details
Fiscal year end
Taxreturn type
Form 990
Year formed
Eligible to receive tax-deductible contributions (Pub 78)
NTEE code, primary
C11: Environment Single Organization Support
NAICS code, primary
813211: Grantmaking Foundations
Parent/child status
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