· Private foundation
The Mezitt Horticultural Foundation
Its FY2025 filing reports that it accepted unsolicited grant applications.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2025.
Where the money goes
Your grants by size, and where they go.
| Recipient | Amount |
|---|---|
| MASSACHUSETTS HORTICULTURAL SOCIETY | $5,000 |
| HORTICULTURAL RESEARCH INSTITUTE | $5,000 |
| NEW ENGLAND BOTANIC GARDEN AT TOWER HILL | $2,000 |
| CORNELL BOTANICAL GARDENS | $1,000 |
| FRIENDS OF BEDROCK GARDENS | $1,000 |
| NATIVE PLANT TRUST | $1,000 |
| RHODODENDRON SOCIETY MA CHAPTER | $1,000 |
| IPPS ER FOUNDATION | $1,000 |
| FRIENDS OF MOUNT AUBURN CEMETARY | $1,000 |
| FUTURE FARMERS AMERICA FOUNDATION | $1,000 |
| MNLA FOUNDATION FOR EDUCATIONAL EXCELLENCE | $1,000 |
| TRUSTEES OF RESERVATION | $1,000 |
| GROW NATIVE MASSACHUSETTS | $1,000 |
| HARVARD UNIVERSITY - ARNOLD ARBORETUM | $1,000 |
| HERITAGE GARDENS | $600 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Dollar for dollar, your grants (FY17–25) land where the poverty rate runs at 9%, against an area that typically sits at 8%. 43% of your dollars go to grantees based in above-average-need neighborhoods. Your grants spread fairly evenly across need levels.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
15 repeat relationships — 10 still active in FY2025, 5 since wound down; 5 grantees were first funded in FY2025 (too recent to call).
How the two cohorts compare
Organizations
Total granted
Still filing today
New vs renewed · share of each year
In FY2025, 59% of grant dollars renewed an existing relationship; $10k went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). The earliest year is left-censored: relationships that predate the data read as “new.” Theme is the grantee’s IRS cause.
Backed again, and grew
- HRHORTICULTURAL RESEARCH INSTITUTE INC9× · 2017–2025 · $17k · revenue +150%
- FOFRIENDS OF MOUNT AUBURN CEMETERY9× · 2017–2025 · $9k · revenue +56%
- FOFRIENDS OF BEDROCK GARDENS9× · 2017–2025 · $6k · revenue +101%
Funded once
- ARAMERICAN RHODODENDRON SOCIETYone grant, 2018 · $2k
- HSHOPKINTON SUSTAINABLE GREEN COMMITTEEone grant, 2024 · $2k
- MFMASSACHUSETTS FFA ASSOCIATIONone grant, 2024 · $1k
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
The new york botanical garden is a museum of plants and a scientific research center devoted to the study of plants and their uses. it is the garden's mission to improve public understanding of the natural world, horticulture, and the…
The mission of the jenkins arboretum & gardens is to preserve natural, tranquil woodlands for community enjoyment, to showcase native plants and a world class collection of rhododendrons and azaleas, and to promote environmental…
To support charitable, plant-based scientific, and educational activities exclusively for the benefit of the minnesota landscape arboretum of the university of minnesota
New england botanic garden at tower hill creates experiences with plants that inspire people and improve the world.
To cultivate and develop an expansive collection of trees, gardens, and plants for all to explore, enjoy and study; and to provide through education and stewardship, a greener, healthier, more beautiful environment.
Our mission is to spark people's curiosity to explore, steward, and find peace and joy in nature. in service to this, norman bird sanctuary inspires, builds, and engages a community of stewards who preserve, protect, enjoy, and learn from…
We harness the power of plants for humankind and share the joy and beauty of tropical gardening with everyone. fairchild tropical botanic garden is a museum of tropical plants within a world famous, 83-acre designed landscape. it was…
To protect the nature of massachusetts for people and for wildlife through education, land conservation, advocacy, scientific research, and habitat stewardship/restoration.
The mission of the mount desert land & garden preserve is to conserve and share the beauty of our historic lands and gardens.
Assisting member clubs with education and appreciation of horticulture, landscape and floral design, gardening and environmental concerns through workshops and schools.
For reference, the grantee most central to the portfolio’s shape is Massachusetts Horticultural Society and the most unlike its peers is Mnla Foundation for Educational Excellence Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
11 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 11 of the 25 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
- Who funds HORTICULTURAL RESEARCH INSTITUTE INC ↗
- Who funds FRIENDS OF MOUNT AUBURN CEMETERY ↗
- Who funds FRIENDS OF BEDROCK GARDENS ↗
- Who funds GROW NATIVE MASSACHUSETTS INC ↗
- Who funds MASSACHUSETTS HORTICULTURAL SOCIETY ↗
- Who funds MNLA FOUNDATION FOR EDUCATIONAL EXCELLENCE INC ↗
- Who funds NATIVE PLANT TRUST INC ↗
- Who funds THE TRUSTEES OF RESERVATIONS ↗
- Who funds MASSACHUSETTS AGRICULTURE IN THE CLASSROOM INC ↗
- Who funds EMMANUEL COLLEGE ↗
- Who funds ISABELLA STEWART GARDNER MUSEUM INC ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
Open a dossier: Boston Foundation Inc · Vanguard Charitable Endowment Program · Fidelity Investments Charitable Gift Fund
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization The Mezitt Horticultural Foundation funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal, a single department, or state — and drag the year to watch it move.
- Native Plant Trust Inc — 3% of income from government
- Grow Native Massachusetts Inc — 3% of income from government
- The Trustees of Reservations — 2% of income from government
- Friends of Mount Auburn Cemetery — 1% of income from government
- Emmanuel College — 0% of income from government
Government income is each org’s traced federal awards (USASpending — grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that your grant caused the public funding. Coverage is precision-first — a floor, not a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12–24 months.