Grants paid by The Mezitt Horticultural Foundation C/O R Wayne Mezitt
EIN 04-3161096 · Hopkinton, MA · Form 990-PF, Part XV
The Mezitt Horticultural Foundation C/O R Wayne Mezitt of Hopkinton, MA (EIN 04-3161096) reported 100 grants paid totaling $172,130 to 24 recipients in tax years 2018–2025, on Form 990-PF, Part XV. Derived from IRS e-file data, dataset version 2026.09.0, built 2026-09-03.
Grants paid
$172,130
100 grants
Recipients
24
distinct organizations
Tax years
2018–2025
8 filings in the corpus
By tax year
| Tax year | Grants paid | Amount paid | Approved for future |
|---|---|---|---|
| 2018 | 11 | $19,450 | — |
| 2019 | 10 | $19,150 | — |
| 2020 | 11 | $20,350 | — |
| 2021 | 12 | $22,250 | — |
| 2022 | 12 | $24,250 | — |
| 2023 | 13 | $22,300 | — |
| 2024 | 16 | $20,780 | — |
| 2025 | 15 | $23,600 | — |
Top recipients
The 24 recipients receiving the most from The Mezitt Horticultural Foundation C/O R Wayne Mezitt, by grants paid, out of 24 distinct recipients.
| Recipient | Match | Location | Grants | Total paid | Latest year |
|---|---|---|---|---|---|
| Ma Horticultural Society | U | Wellesley, MA | 6 | $84,500 | 2023 |
| Horticultural Research Institute 52-1052547 | D | Columbus, OH | 8 | $15,500 | 2025 |
| Tower Hill Botanical Gardens | U | Boylston, MA | 7 | $9,300 | 2024 |
| Friends of Mount Auburn Cemetary 22-3084639 | C | Cambridge, MA | 8 | $7,750 | 2025 |
| Ipps Er Foundation | U | Wakefield, RI | 6 | $6,000 | 2025 |
| Friends of Bedrock Gardens | U | Lee, NH | 8 | $5,300 | 2025 |
| Grow Native Massachusetts 27-3673855 | C | Waltham, MA | 8 | $5,100 | 2025 |
| Cornell Botanical Gardens | U | Ithaca, NY | 8 | $5,030 | 2025 |
| Mnla Foundation for Educational Excellence | U | Conway, MA | 7 | $5,000 | 2025 |
| Massachusetts Horticultural Society 04-2104714 | B | Wellesley, MA | 1 | $5,000 | 2025 |
| Native Plant Trust 04-2104768 | C | Framingham, MA | 7 | $4,500 | 2025 |
| Harvard University - Arnold Arboretum | U | Cambridge, MA | 5 | $4,250 | 2025 |
| American Rhododendron Society 23-7244608 | B | Milford, MA | 2 | $2,500 | 2024 |
| New England Botanic Garden at Tower Hill | U | Boylston, MA | 1 | $2,000 | 2025 |
| Hopkinton Sustainable Green Committee | U | Hopkinton, MA | 1 | $2,000 | 2024 |
| Trustees of Reservation 04-2105780 | C | Boston, MA | 2 | $2,000 | 2025 |
| Massachusetts Ffa Association | U | Dighton, MA | 1 | $1,000 | 2024 |
| Future Farmers America Foundation | U | Abington, MA | 1 | $1,000 | 2025 |
| Massachusetts Agriculture in the Classroom | U | Marlborough, MA | 7 | $1,000 | 2024 |
| Rhododendron Society Ma Chapter | U | Seekonk, MA | 1 | $1,000 | 2025 |
| Isabelle Stewart Gardner Museum 04-2104334 | C | Boston, MA | 2 | $800 | 2024 |
| Heritage Gardens | U | Sandwich, MA | 1 | $600 | 2025 |
| Emmanuel College | U | Boston, MA | 1 | $500 | 2019 |
| Mt Auburn Cemetary | U | Cambridge, MA | 1 | $500 | 2018 |
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Every grant
All 100 grant rows this organization reported, most recent first.
| Tax year | Recipient | Match | Amount | Type | Purpose | Source filing |
|---|---|---|---|---|---|---|
| 2025 | Horticultural Research Institute Columbus, OH | D | $5,000 | paid | RESEARCH | 202631349349102188 |
| 2025 | Massachusetts Horticultural Society Wellesley, MA | B | $5,000 | paid | EDUCATION | 202631349349102188 |
| 2025 | New England Botanic Garden at Tower Hill Boylston, MA | U | $2,000 | paid | EDUCATION | 202631349349102188 |
| 2025 | Ipps Er Foundation Wakefield, RI | U | $1,000 | paid | RESEARCH EDUCATION | 202631349349102188 |
| 2025 | Friends of Mount Auburn Cemetary Cambridge, MA | C | $1,000 | paid | EDUCATIONAL PROGRAMS/CONSERVATION | 202631349349102188 |
| 2025 | Cornell Botanical Gardens Ithaca, NY | U | $1,000 | paid | EDUCATION | 202631349349102188 |
| 2025 | Future Farmers America Foundation Abington, MA | U | $1,000 | paid | EDUCATION | 202631349349102188 |
| 2025 | Grow Native Massachusetts Waltham, MA | C | $1,000 | paid | CHARITABLE | 202631349349102188 |
| 2025 | Friends of Bedrock Gardens Lee, NH | U | $1,000 | paid | CHARITABLE - CULTURAL AND EDUCATIONAL GARDENS | 202631349349102188 |
| 2025 | Rhododendron Society Ma Chapter Seekonk, MA | U | $1,000 | paid | EDUCATION | 202631349349102188 |
| 2025 | Trustees of Reservation Boston, MA | C | $1,000 | paid | EDUCATION | 202631349349102188 |
| 2025 | Native Plant Trust Framingham, MA | C | $1,000 | paid | EDUCATION | 202631349349102188 |
| 2025 | Harvard University - Arnold Arboretum Cambridge, MA | U | $1,000 | paid | EDUCATION | 202631349349102188 |
| 2025 | Mnla Foundation for Educational Excellence Conway, MA | U | $1,000 | paid | EDUCATION | 202631349349102188 |
| 2025 | Heritage Gardens Sandwich, MA | U | $600 | paid | EDUCATION | 202631349349102188 |
| 2024 | Horticultural Research Institute Columbus, OH | D | $2,500 | paid | RESEARCH | 202521259349100117 |
| 2024 | Tower Hill Botanical Gardens Boylston, MA | U | $2,500 | paid | EDUCATION | 202521259349100117 |
| 2024 | Ipps Er Foundation Wakefield, RI | U | $2,000 | paid | RESEARCH EDUCATION | 202521259349100117 |
| 2024 | Hopkinton Sustainable Green Committee Hopkinton, MA | U | $2,000 | paid | EDUCATION | 202521259349100117 |
| 2024 | Harvard University - Arnold Arboretum Cambridge, MA | U | $1,500 | paid | EDUCATION | 202521259349100117 |
| 2024 | Friends of Mount Auburn Cemetary Cambridge, MA | C | $1,500 | paid | EDUCATIONAL PROGRAMS/CONSERVATION | 202521259349100117 |
| 2024 | Native Plant Trust Framingham, MA | C | $1,500 | paid | EDUCATION | 202521259349100117 |
| 2024 | Cornell Botanical Gardens Ithaca, NY | U | $1,030 | paid | EDUCATION | 202521259349100117 |
| 2024 | Massachusetts Ffa Association Dighton, MA | U | $1,000 | paid | EDUCATION | 202521259349100117 |
| 2024 | Mnla Foundation for Educational Excellence Conway, MA | U | $1,000 | paid | EDUCATION | 202521259349100117 |
| 2024 | Trustees of Reservation Boston, MA | C | $1,000 | paid | EDUCATION | 202521259349100117 |
| 2024 | Grow Native Massachusetts Waltham, MA | C | $1,000 | paid | CHARITABLE | 202521259349100117 |
| 2024 | Friends of Bedrock Gardens Lee, NH | U | $1,000 | paid | CHARITABLE - CULTURAL AND EDUCATIONAL GARDENS | 202521259349100117 |
| 2024 | American Rhododendron Society Ma Chapter Hopkinton, MA | D | $500 | paid | EDUCATION | 202521259349100117 |
| 2024 | Isabelle Stewart Gardner Museum Boston, MA | C | $500 | paid | ARTS & CULTURE & EDUCATION | 202521259349100117 |
| 2024 | Massachusetts Agriculture in the Classroom Marlborough, MA | U | $250 | paid | EDUCATIONAL | 202521259349100117 |
| 2023 | Ma Horticultural Society Wellesley, MA | U | $11,000 | paid | EDUCATIONAL | 202431279349100248 |
| 2023 | Horticultural Research Institute Columbus, OH | D | $3,500 | paid | RESEARCH | 202431279349100248 |
| 2023 | Tower Hill Botanical Gardens Boylston, MA | U | $1,500 | paid | EDUCATION | 202431279349100248 |
| 2023 | Grow Native Massachusetts Waltham, MA | C | $1,000 | paid | CHARITABLE | 202431279349100248 |
| 2023 | Friends of Mount Auburn Cemetary Cambridge, MA | C | $1,000 | paid | EDUCATIONAL PROGRAMS/CONSERVATION | 202431279349100248 |
| 2023 | Ipps Er Foundation Wakefield, RI | U | $1,000 | paid | RESEARCH EDUCATION | 202431279349100248 |
| 2023 | Harvard University - Arnold Arboretum Cambridge, MA | U | $750 | paid | EDUCATION | 202431279349100248 |
| 2023 | Friends of Bedrock Gardens Lee, NH | U | $600 | paid | CHARITABLE - CULTURAL AND EDUCATIONAL GARDENS | 202431279349100248 |
| 2023 | Native Plant Trust Framingham, MA | C | $500 | paid | EDUCATION | 202431279349100248 |
| 2023 | Mnla Foundation for Educational Excellence Conway, MA | U | $500 | paid | EDUCATION | 202431279349100248 |
| 2023 | Cornell Botanical Gardens Ithaca, NY | U | $500 | paid | EDUCATION | 202431279349100248 |
| 2023 | Isabelle Stewart Gardner Museum Boston, MA | C | $300 | paid | ARTS & CULTURE & EDUCATION | 202431279349100248 |
| 2023 | Massachusetts Agriculture in the Classroom Marlborough, MA | U | $150 | paid | EDUCATIONAL | 202431279349100248 |
| 2022 | Ma Horticultural Society Wellesley, MA | U | $15,000 | paid | EDUCATIONAL | 202311389349100711 |
| 2022 | Tower Hill Botanical Gardens Boylston, MA | U | $2,500 | paid | EDUCATION | 202311389349100711 |
| 2022 | Horticultural Research Institute Columbus, OH | D | $1,500 | paid | RESEARCH | 202311389349100711 |
| 2022 | Friends of Mount Auburn Cemetary Cambridge, MA | C | $1,000 | paid | EDUCATIONAL PROGRAMS/CONSERVATION | 202311389349100711 |
| 2022 | Ipps Er Foundation Wakefield, RI | U | $1,000 | paid | RESEARCH EDUCATION | 202311389349100711 |
| 2022 | Friends of Bedrock Gardens Lee, NH | U | $600 | paid | CHARITABLE - CULTURAL AND EDUCATIONAL GARDENS | 202311389349100711 |
| 2022 | Grow Native Massachusetts Waltham, MA | C | $500 | paid | CHARITABLE | 202311389349100711 |
| 2022 | Native Plant Trust Framingham, MA | C | $500 | paid | EDUCATION | 202311389349100711 |
| 2022 | Harvard University - Arnold Arboretum Cambridge, MA | U | $500 | paid | EDUCATION | 202311389349100711 |
| 2022 | Cornell Botanical Gardens Ithaca, NY | U | $500 | paid | EDUCATION | 202311389349100711 |
| 2022 | Mnla Foundation for Educational Excellence Conway, MA | U | $500 | paid | EDUCATION | 202311389349100711 |
| 2022 | Massachusetts Agriculture in the Classroom Marlborough, MA | U | $150 | paid | EDUCATIONAL | 202311389349100711 |
| 2021 | Ma Horticultural Society Wellesley, MA | U | $15,000 | paid | EDUCATIONAL | 202201469349100905 |
| 2021 | Friends of Mount Auburn Cemetary Cambridge, MA | C | $2,000 | paid | EDUCATIONAL PROGRAMS/CONSERVATION | 202201469349100905 |
| 2021 | Tower Hill Botanical Gardens Boylston, MA | U | $1,000 | paid | RESEARCH FOR IMPROVED PLANT TYPES - CHARITABLE | 202201469349100905 |
| 2021 | Friends of Bedrock Gardens Lee, NH | U | $600 | paid | CHARITABLE - CULTURAL AND EDUCATIONAL GARDENS | 202201469349100905 |
| 2021 | Horticultural Research Institute Columbus, OH | D | $500 | paid | RESEARCH | 202201469349100905 |
| 2021 | Harvard University - Arnold Arboretum Cambridge, MA | U | $500 | paid | EDUCATION | 202201469349100905 |
| 2021 | Ipps Er Foundation Wakefield, RI | U | $500 | paid | RESEARCH EDUCATION | 202201469349100905 |
| 2021 | Mnla Foundation for Educational Excellence Conway, MA | U | $500 | paid | EDUCATION | 202201469349100905 |
| 2021 | Grow Native Massachusetts Waltham, MA | C | $500 | paid | CHARITABLE | 202201469349100905 |
| 2021 | Cornell Botanical Gardens Ithaca, NY | U | $500 | paid | EDUCATION | 202201469349100905 |
| 2021 | Native Plant Trust Framingham, MA | C | $500 | paid | EDUCATION | 202201469349100905 |
| 2021 | Massachusetts Agriculture in the Classroom Marlborough, MA | U | $150 | paid | EDUCATIONAL | 202201469349100905 |
| 2020 | Ma Horticultural Society Wellesley, MA | U | $15,000 | paid | EDUCATIONAL | 202101119349100405 |
| 2020 | Horticultural Research Institute Columbus, OH | D | $1,500 | paid | RESEARCH | 202101119349100405 |
| 2020 | Grow Native Massachusetts Waltham, MA | C | $500 | paid | CHARITABLE | 202101119349100405 |
| 2020 | Tower Hill Botanical Gardens Boylston, MA | U | $500 | paid | RESEARCH FOR IMPROVED PLANT TYPES - CHARITABLE | 202101119349100405 |
| 2020 | Cornell Botanical Gardens Ithaca, NY | U | $500 | paid | EDUCATION | 202101119349100405 |
| 2020 | Mnla Foundation for Educational Excellence Conway, MA | U | $500 | paid | EDUCATION | 202101119349100405 |
| 2020 | Ipps Er Foundation Wakefield, RI | U | $500 | paid | RESEARCH EDUCATION | 202101119349100405 |
| 2020 | Friends of Bedrock Gardens Lee, NH | U | $500 | paid | CHARITABLE - CULTURAL AND EDUCATIONAL GARDENS | 202101119349100405 |
| 2020 | Friends of Mount Auburn Cemetary Cambridge, MA | C | $500 | paid | EDUCATIONAL PROGRAMS/CONSERVATION | 202101119349100405 |
| 2020 | Native Plant Trust Framingham, MA | C | $250 | paid | EDUCATION | 202101119349100405 |
| 2020 | Massachusetts Agriculture in the Classroom Marlborough, MA | U | $100 | paid | EDUCATIONAL | 202101119349100405 |
| 2019 | Ma Horticultural Society Wellesley, MA | U | $15,000 | paid | EDUCATIONAL | 202001299349101805 |
| 2019 | Tower Hill Botanical Gardens Boylston, MA | U | $800 | paid | RESEARCH FOR IMPROVED PLANT TYPES - CHARITABLE | 202001299349101805 |
| 2019 | Cornell Botanical Gardens Ithaca, NY | U | $500 | paid | EDUCATION | 202001299349101805 |
| 2019 | Grow Native Massachusetts Waltham, MA | C | $500 | paid | CHARITABLE | 202001299349101805 |
| 2019 | Horticultural Research Institute Columbus, OH | D | $500 | paid | RESEARCH | 202001299349101805 |
| 2019 | Emmanuel College Boston, MA | U | $500 | paid | EDUCATION | 202001299349101805 |
| 2019 | Friends of Bedrock Gardens Lee, NH | U | $500 | paid | CHARITABLE - CULTURAL AND EDUCATIONAL GARDENS | 202001299349101805 |
| 2019 | Friends of Mount Auburn Cemetary Cambridge, MA | C | $500 | paid | EDUCATIONAL PROGRAMS/CONSERVATION | 202001299349101805 |
| 2019 | Native Plant Trust Framingham, MA | C | $250 | paid | EDUCATION | 202001299349101805 |
| 2019 | Massachusetts Agriculture in the Classroom Marlborough, MA | U | $100 | paid | EDUCATIONAL | 202001299349101805 |
| 2018 | Ma Horticultural Society Wellesley, MA | U | $13,500 | paid | EDUCATIONAL | 201921339349100737 |
| 2018 | American Rhododendron Society Milford, MA | B | $2,000 | paid | CHARITABLECHARITABLE | 201921339349100737 |
| 2018 | Mnla Foundation for Educational Excellence Conway, MA | U | $1,000 | paid | EDUCATIONAL | 201921339349100737 |
| 2018 | Mt Auburn Cemetary Cambridge, MA | U | $500 | paid | CHARITABLE | 201921339349100737 |
| 2018 | Tower Hill Botanical Gardens Boylston, MA | U | $500 | paid | RESEARCH FOR IMPROVED PLANT TYPES - CHARITABLE | 201921339349100737 |
| 2018 | Horticultural Research Institute Columbus, OH | D | $500 | paid | RESEARCH | 201921339349100737 |
| 2018 | Cornell Botanical Gardens Ithaca, NY | U | $500 | paid | EDUCATION | 201921339349100737 |
| 2018 | Friends of Bedrock Gardens Lee, NH | U | $500 | paid | CHARITABLE - CULTURAL AND EDUCATIONAL GARDENS | 201921339349100737 |
| 2018 | Friends of Mount Auburn Cemetary Cambridge, MA | C | $250 | paid | EDUCATIONAL PROGRAMS/CONSERVATION | 201921339349100737 |
| 2018 | Grow Native Massachusetts Waltham, MA | C | $100 | paid | CHARITABLE | 201921339349100737 |
| 2018 | Massachusetts Agriculture in the Classroom Marlborough, MA | U | $100 | paid | EDUCATIONAL | 201921339349100737 |
Match tier: A Reported EIN · B Exact name and place · C Strong name match · D Probable name match · U Unresolved. Tiers C and D are inferred, not reported; see how matching works.
Recipient matching for this dataset version has not yet completed its independent precision check. Tier A rows carry the EIN the filer reported; tiers B–D are the matcher's inference and should be read as leads until the check is published on the methodology page.
Source filings
Every figure above is traceable to one of these IRS e-file returns by its OBJECT_ID.
| Form | Tax year | Period end | Filed | Schema | IRS OBJECT_ID |
|---|---|---|---|---|---|
| 990PF | 2025 | 2025-12-31 | not stated | 2025v4.1 | 202631349349102188 |
| 990PF | 2024 | 2024-12-31 | not stated | 2024v5.1 | 202521259349100117 |
| 990PF | 2023 | 2023-12-31 | not stated | 2023v5.0 | 202431279349100248 |
| 990PF | 2022 | 2022-12-31 | not stated | 2022v5.0 | 202311389349100711 |
| 990PF | 2021 | 2021-12-31 | not stated | 2021v4.2 | 202201469349100905 |
| 990PF | 2020 | 2020-12-31 | not stated | 2020v4.1 | 202101119349100405 |
| 990PF | 2019 | 2019-12-31 | not stated | 2019v5.1 | 202001299349101805 |
| 990PF | 2018 | 2018-12-31 | not stated | 2018v3.1 | 201921339349100737 |
Derived from IRS Form 990-PF e-file XML; recipient identities from the IRS Exempt Organizations Business Master File. Dataset version 2026.09.0, built 2026-09-03. The same rows as Parquet: manifest; as JSON: /api/funders/043161096.json.
The same organization elsewhere in the program: exempt status and filing health · federal awards · grant guidance · open opportunities.
This is informational only, derived from public data on the dates shown. It is not an eligibility determination, and not legal, tax, or accounting advice. Verify against the official source before relying on it.