National Tropical Botanical Garden
To enrich life by perpetuating tropical plants, ecosystems and cultural heritage through discovery, scientific research, conservation, and education.
Key facts about National Tropical Botanical Garden
In short: National Tropical Botanical Garden gave $7K across 1 grant in 2024 (avg $7K), mostly in Florida. Source: 2024 IRS Form 990 filing.
- EIN
- 52-6057064
- Latest 990 filing
- Form 990 filing, 2024
- Annual giving (2024)
- $7,000
- Grants made (2024)
- 1
- Average grant
- $7,000
- Median grant
- $7,000
- Total assets
- $98,830,821
- Primary geography
- Florida (100% of itemized 2024 grant dollars)
Data from IRS Form 990 filing, 2024; updated September 2026.
Financial Overview
From 2024 IRS Form 990 filing · View filing
Total Assets
$98.8M
+20.6% YoY
Annual Giving
$7K
Grant Count
1
Avg Grant Size
$7K
About National Tropical Botanical Garden
Based on IRS filings
National Tropical Botanical Garden is a nonprofit organization focused on Environment & Animals, based in Kalaheo, HI. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $98.8M in total assets. In 2024, it awarded 1 grant totaling $7K. Net investment income was $2.6M.
Focus Areas
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2024 grant dollars on its one itemized grant.
States
Cities
Giving Over Time
Total grant dollars and number of grants per year
In 2024 it made 1 grant totaling $7K.
Grant Insights
How this funder distributes its grants
Top Recipients
Top recipient in 2024
The largest 2024 recipient was Florida International University ($7K).
Grant Size Distribution
1 grant across all recorded years
The most common grant size was under $50K: 1 grant of 1 (100%).
Giving History
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Florida International University Miami, FL | Support of Highschool Intern Program | $7,000 |
Financial History
Multi-year comparison from IRS filings
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $98,830,821 | $81,941,242 | $80,182,510 |
| Revenue | $29,167,793 | $12,932,790 | $15,141,654 |
| Expenses | $14,417,543 | $13,631,747 | $12,903,414 |
| Net Investment Income | $2,599,535 | $1,541,270 | $3,442,147 |
Data update history
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2024
Leadership & Key People
Officers and directors from IRS filings
National Tropical Botanical Garden is led by Janet L. Mayfield, CEO & Director on every filing since 2020; 2 of 26 officers listed in 2024 are compensated.
Officers on the 2024 filing
Janet L. Mayfield
CEO & Director
On filings since 2020
60 hrs/week
$143K (2020) → $173K (2024)
Gordon L. Deane
Chairman
On filings since 2020
2 hrs/week
No compensation reported
Thomas D. Hewitt
Prior Chairman
On filings since 2020
1 hr/week
No compensation reported
Adaline H. Frelinghuysen
Trustee
On filings since 2020
1 hr/week
No compensation reported
Anita Seipp
Trustee
On filings since 2020
1 hr/week
No compensation reported
Carol Dickinson
Trustee
On filings since 2020
1 hr/week
No compensation reported
Catherine Topham
Trustee
On filings since 2020
1 hr/week
No compensation reported
Cynthia Salley
Trustee
On filings since 2020
1 hr/week
No compensation reported
David Rae
Trustee
On filings since 2020
1 hr/week
No compensation reported
Devon Angelini
Trustee
On filings since 2020
1 hr/week
No compensation reported
Elizabeth E. Matthews
Trustee
On filings since 2020
1 hr/week
No compensation reported
Emerson Knowles
Trustee
On filings since 2020
2 hrs/week
No compensation reported
Harriet Fraunfelter
Trustee
On filings since 2020
1 hr/week
No compensation reported
Linford L. Loughheed
Trustee
On filings since 2020
1 hr/week
No compensation reported
Merrill L. Magowan
Trustee
On filings since 2020
2 hrs/week
No compensation reported
Michael N. Rosenberg DDS
Trustee
On filings since 2020
1 hr/week
No compensation reported
Patricia W. Sheehan
Trustee
On filings since 2020
1 hr/week
No compensation reported
Peter C. Gardner
Trustee
On filings since 2020
1 hr/week
No compensation reported
Robert D. Weist
Trustee
On filings since 2020
1 hr/week
No compensation reported
Phyliss Evans Swindells
Trustee
On filings since 2021
1 hr/week
No compensation reported
Sam 'ohu Gon III PhD
Trustee
On filings since 2021
1 hr/week
No compensation reported
Christopher D. Turner
Trustee
New on the 2024 filing
1 hr/week
No compensation reported
Tamara A. Rollins
CFO
On filings since 2020
60 hrs/week
$100K (2020) → $131K (2024)
Anne G. Earhart
Vice Chair
On filings since 2020
1 hr/week
No compensation reported
Jan D. Elliott
Secretary
Trustee → Secretary, 2023
On filings since 2020
1 hr/week
No compensation reported
Katherine G. Richardson
Senior Vice Chair
Vice Chair → Senior Vice Chair, 2022
On filings since 2020
2 hrs/week
No compensation reported
Former officers (14)
- Former: Christina Wilson (2020–2023) — Trustee
- Former: David W. Pratt (2020–2023) — Trustee
- Former: Heather George (2020–2023) — Director of Philanthropy
- Former: Judy C. Webb (2020–2023) — Trustee
- Former: Thomas L. Reveley (2020–2023) — Trustee
- Former: David Bryant (2023) — Director of Communications
- Former: Nina Ronsted (2023) — Director of Science
- Former: Tobias Koehler (2023) — Director of Southshore Gardens
- Former: Charles R. Chipper Wichman Jr. (2020–2022) — President
- Former: John H. Rashford PhD (2020–2022) — Trustee
- Former: Mary Hanahan (2020–2021) — Trustee
- Former: Mary M. Cudahy (2020–2021) — Trustee
- Former: Carol Ragone (2020) — Director of Breadfruit Institute
- Former: Nina Roenstad (2020) — Director of Science
Data from IRS Form 990 filings, 2020–2024. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2024 IRS filing
The highest reported compensation on the 2024 filing was $173K, to Janet L Mayfield (CEO & Director). 2 officers or directors reported compensation on that filing.
Frequently asked questions about National Tropical Botanical Garden
How much does National Tropical Botanical Garden give each year?
National Tropical Botanical Garden gave $7K across 1 grant in 2024, according to its 2024 IRS Form 990 filing.
How large is National Tropical Botanical Garden?
National Tropical Botanical Garden reported $98.8M in total assets on its 2024 IRS Form 990 filing. Its revenue that year was $29.2M.
What is National Tropical Botanical Garden?
National Tropical Botanical Garden is a nonprofit organization focused on Environment & Animals, based in Kalaheo, HI. It holds $98.8M in total assets as of 2024.
Where does National Tropical Botanical Garden operate?
National Tropical Botanical Garden has awarded grants in Florida.
What is National Tropical Botanical Garden's EIN?
National Tropical Botanical Garden's EIN (Employer Identification Number) is 52-6057064. IRS Form 990 filing data is available on this page for 2020–2024.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Here's the math on researching National Tropical Botanical Garden by hand.
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