California · Nonprofit
California Garden and Landscape History Society
California Garden and Landscape History Society (California) receives grants from 2 organizations whose IRS filings report $7,500 to it, the largest being DONOR ADVISED CHARITABLE GIVING INC ($5,000). 0 of them have funded it in more than one year, and 67% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- Revenue FY2024
- $62k
- Funders on record
- 2
- Grants received
- $8k
- Net assets
- $45k
What California Garden and Landscape History Society does
Mission
To celebrate and promote wider knowledge preservation and restoration of Californias historic gardens and landscapes. To organize study visits to historic gardens and landscapes as well as relevant archives and libraries. To offer opportunities for interchange among members at meetings garden visits and other events.
As stated on its FY2024 Form 990-EZ.
Programs
EDEN Magazine published 2-4 times yearly and distributed to about 280 members as well as libraries and university archives. Includes essays featuring historic gardens and landscapes
$15,821 spent50% of program spendingThe CGLHS annual conference is a three day event held at different locations each year featuring speakers and garden tours. Approximately 50-60 people attend this event each year.
$12,276 spent39% of program spendingRegional tours and educational talks held throughout the state of California featuring historic gardens and landscapes. Approximately 200 attendees across all events.
$3,615 spent11% of program spending
The 3 programs described on its FY2024 Form 990-EZ. Program spending in total: $31,712.
Who funds it, year by year
Grant support over time, funder by funder — shade shows the grant size each year.
1 of 2 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 67% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
From the IRS filings of California Garden and Landscape History Society’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
California Garden and Landscape History Society leans on a few funders — its largest provides 67% of grant income and the top three 100%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
67% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund California Garden and Landscape History Society.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Where its funders are
67% of California Garden and Landscape History Society's grant income arrives through donor-advised or pass-through sponsors, whose addresses record where the money is held rather than where the donor is. Of the $3k that is directly attributable, 100% of it comes from California funders.
Funder states come from each funder’s own filing. $5k arriving through sponsors registered in 1 state is excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Against its field
California Garden and Landscape History Society runs a healthier operating margin than half of the 3,152 environment nonprofits its size.
this organization peer median middle 50% of peers· 3,152 environment nonprofits under $100k, FY2024
Organizations like California Garden and Landscape History Society
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In California
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Public support
81%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for California Garden and Landscape History Society: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds California Garden and Landscape History Society?
- California Garden and Landscape History Society (California) receives grants from 2 organizations whose IRS filings report $7,500 to it, the largest being DONOR ADVISED CHARITABLE GIVING INC ($5,000). 0 of them have funded it in more than one year, and 67% of the money arrives through donor-advised or pass-through sponsors rather than from an institution directly.
- How many funders does California Garden and Landscape History Society have?
- IRS filings report 2 organizations giving $7,500 in grants to California Garden and Landscape History Society.
- Who is the largest funder of California Garden and Landscape History Society?
- DONOR ADVISED CHARITABLE GIVING INC is the largest funder on record, with $5,000 in grants. The full list of funders is on this page.
- How can an organization like California Garden and Landscape History Society find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in California. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
Play a game about who funds California Garden and Landscape History Society →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2024 (financials across 2024–2024), and the filings of 2 funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported October 14, 2026. What this page cannot tell you · view filing