Company lists · Data refreshed September 2026

Top 25 Botanical and horticultural nonprofits based in the United States

Name: Botanical and horticultural nonprofits based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 15, 2026 861 companies tracked

RevenueBase identified 861 botanical and horticultural nonprofits headquartered in the United States as of September 2026 and tracks 11,274 professional contacts across them, including 3,896 with verified work emails. New York is the largest hub.

This list covers botanical and horticultural nonprofits headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 15, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 15, 2026 86% judged on-target in blind review

861Companies

11,274Contacts tracked

3,896Verified emails

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The 25 largest botanical and horticultural nonprofits based in the United States

Ranked by team size

Top 25 of 861 botanical and horticultural nonprofits based in the United States, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to botanical and horticultural nonprofits: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	NEW York Botanical Garden	Partial evidence	Bronx, NY, United StatesHQ checked Sep 15, 2026	501-1,000	616 contacts →
	Partial evidence “The New York Botanical Garden has been a connective hub among people, plants, and the planet since 1891.” Source: RevenueBase Database · checked Sep 15, 2026
2	Longwood Gardens	Indirect evidence	Kennett Square, PA, United StatesHQ checked Sep 15, 2026	501-1,000	540 contacts →
	Indirect evidence “In 1906, industrialist Pierre du Pont (1870-1954) purchased a small farm near Kennett Square, PA, to save a collection of historic trees from being sold for lumber.” Source: RevenueBase Database · checked Sep 15, 2026
3	Missouri Botanical Garden	Partial evidence	St. Louis, MO, United StatesHQ checked Sep 15, 2026	201-500	516 contacts →
	Partial evidence “Founded in 1859 by philanthropist Henry Shaw, the Missouri Botanical Garden is one of the nation's oldest botanical gardens in continuous operation and a National Historic…” Source: RevenueBase Database · checked Sep 15, 2026
4	The Morton Arboretum	Partial evidence	Lisle, IL, United StatesHQ checked Sep 15, 2026	201-500	382 contacts →
	Partial evidence “The Morton Arboretum is an internationally-recognized botanical garden and tree research center in Lisle, Illinois.” Source: RevenueBase Database · checked Sep 15, 2026
5	Denver Botanic Gardens	Partial evidence	Denver, CO, United StatesHQ checked Sep 15, 2026	201-500	304 contacts →
	Partial evidence “Celebrating it's 75th anniversary in 2026, Denver Botanic Gardens is considered one of the top botanical gardens in the United States and a pioneer in water conservation.” Source: RevenueBase Database · checked Sep 15, 2026
6	Atlanta Botanical Garden	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 15, 2026	201-500	247 contacts →
	Partial evidence “The Atlanta Botanical Garden is among the top tier of cultural attractions in Atlanta and Gainesville, Georgia.” Source: RevenueBase Database · checked Sep 15, 2026
7	Brooklyn Botanic Garden	Strong evidence	Brooklyn, NY, United StatesHQ checked Sep 15, 2026	51-200	229 contacts →
	Strong evidence “Founded in 1910, Brooklyn Botanic Garden (BBG) is an independent nonprofit institution committed to education, research, and the display of horticulture.” Source: RevenueBase Database · checked Sep 15, 2026
8	Holden Forests & Gardens	Partial evidence	Kirtland, OH, United StatesHQ checked Sep 15, 2026	51-200	156 contacts →
	Partial evidence “Holden Forests & Gardens is made up of two of Northeast Ohio’s most important environmental and cultural institutions, the Holden Arboretum and Cleveland Botanical Garden, whose…” Source: RevenueBase Database · checked Sep 15, 2026
9	Fairchild Tropical Botanic Garden	Partial evidence	Miami, FL, United StatesHQ checked Sep 15, 2026	51-200	144 contacts →
	Partial evidence “Fairchild Tropical Botanic Garden is a 83 acre botanic garden located in Coral Gables, FL.” Source: RevenueBase Database · checked Sep 15, 2026
10	Phipps Conservatory And Botanical Gardens	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 15, 2026	51-200	135 contacts →
	Partial evidence “Founded in 1893, Phipps Conservatory and Botanical Gardens in Pittsburgh, Pa.” Source: RevenueBase Database · checked Sep 15, 2026
11	Gilroy Gardens Family Theme Park	Strong evidence	Gilroy, CA, United StatesHQ checked Sep 15, 2026	201-500	134 contacts →
	Strong evidence “Gilroy Gardens Family Theme Park is a 501(c)(3) nonprofit corporation and California’s only horticultural theme park.” Source: RevenueBase Database · checked Sep 15, 2026
12	Fort Worth Botanic Garden	Partial evidence	Fort Worth, TX, United StatesHQ checked Sep 15, 2026	51-200	112 contacts →
	Partial evidence “Enjoy the captivating beauty of Fort Worth Botanic Garden (FWBG) and Botanical Research Institute of Texas (BRIT), one of the largest centers for botanical exploration and…” Source: RevenueBase Database · checked Sep 15, 2026
13	Lewis Ginter Botanical Garden	Partial evidence	Richmond, VA, United StatesHQ checked Sep 15, 2026	51-200	112 contacts →
	Partial evidence “Lewis Ginter Botanical Garden’s mission is education and our passion is connecting people and plants to improve communities.” Source: RevenueBase Database · checked Sep 15, 2026
14	Trees Atlanta	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 15, 2026	11-50	111 contacts →
	Indirect evidence “Founded in 1985 by Central Atlanta Progress, the Junior League of Atlanta, Inc.” Source: RevenueBase Database · checked Sep 15, 2026
15	Lady Bird Johnson Wildflower Center	Indirect evidence	Austin, TX, United StatesHQ checked Sep 15, 2026	51-200	88 contacts →
	Indirect evidence “The University of Texas at Austin's Lady Bird Johnson Wildflower Center inspires the conservation of native plants through its gardens and education, research and outreach…” Source: RevenueBase Database · checked Sep 15, 2026
16	Geo. W. Park Seed Company, INC	Indirect evidence	Greenwood, SC, United StatesHQ checked Sep 15, 2026	201-500	88 contacts →
	Indirect evidence “Park Seed Company has provided seeds, plants, and bulbs to American home gardeners for more than 142 years.” Source: RevenueBase Database · checked Sep 15, 2026
17	Natural Lands	Indirect evidence	Media, PA, United StatesHQ checked Sep 15, 2026	51-200	80 contacts →
	Indirect evidence “Natural Lands is dedicated to preserving and nurturing nature’s wonders while creating opportunities for joy and discovery in the outdoors for everyone.” Source: RevenueBase Database · checked Sep 15, 2026
18	Huntsville Botanical Garden	Partial evidence	Huntsville, AL, United StatesHQ checked Sep 15, 2026	51-200	77 contacts →
	Partial evidence “The 118-acre Huntsville Botanical Garden is open year-round and contains a diverse ecosystem of meadows, upland and bottomland forest, and wetlands, as well as a variety of…” Source: RevenueBase Database · checked Sep 15, 2026
19	Wave Hill	Indirect evidence	Bronx, NY, United StatesHQ checked Sep 15, 2026	11-50	75 contacts →
	Indirect evidence “Wave Hill is a 28-acre public garden and cultural center in the Bronx overlooking the Hudson River and Palisades.” Source: RevenueBase Database · checked Sep 15, 2026
20	Epic Gardening	Indirect evidence	Broomfield, CO, United StatesHQ checked Sep 15, 2026	51-200	74 contacts →
	Indirect evidence “We are home to the largest gardening community on the planet - trusted by millions across YouTube, Instagram, TikTok, and our blog for making gardening simple, fun, and possible…” Source: RevenueBase Database · checked Sep 15, 2026
21	Mt. Cuba Center	Indirect evidence	Hockessin, DE, United StatesHQ checked Sep 15, 2026	51-200	72 contacts →
	Indirect evidence “Mt.” Source: RevenueBase Database · checked Sep 15, 2026
22	NEW England Botanic Garden At Tower Hill	Strong evidence	Boylston, MA, United StatesHQ checked Sep 15, 2026	51-200	71 contacts →
	Strong evidence “New England Botanic Garden at Tower Hill is the home of the Worcester County Horticultural Society, the third oldest organization of its kind in the country.” Source: RevenueBase Database · checked Sep 15, 2026
23	SAN Antonio Botanical Garden	Partial evidence	San Antonio, TX, United StatesHQ checked Sep 15, 2026	11-50	68 contacts →
	Partial evidence “The San Antonio Botanical Garden strives to connect people to the plant world through experience, education, and research.” Source: RevenueBase Database · checked Sep 15, 2026
24	The North Carolina Arboretum	Indirect evidence	Asheville, NC, United StatesHQ checked Sep 15, 2026	51-200	68 contacts →
	Indirect evidence “The North Carolina Arboretum in Asheville, N.C, works to advance the state's future by creatively connecting people, plants and places through education, design and economic…” Source: RevenueBase Database · checked Sep 15, 2026
25	Descanso Gardens	Strong evidence	La Canada Flintridge, CA, United StatesHQ checked Sep 15, 2026	51-200	62 contacts →
	Strong evidence “Descanso Gardens is an urban retreat of year-round natural beauty, internationally renowned botanical collections and spectacular seasonal horticultural displays.” Source: RevenueBase Database · checked Sep 15, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: botanical and horticultural nonprofits. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names botanical and horticultural nonprofits.
Partial evidence: Its own public description names part of botanical and horticultural nonprofits, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name botanical and horticultural nonprofits. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 861 botanical and horticultural nonprofits based in the United States

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Botanical and horticultural nonprofits based in the United States at a glance

As of Sep 15, 2026

34.6%Verified-email coverage

13.1Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · New York

Sep 15, 2026Page data refreshed

Companies by employee count

1-10

577

11-50

207

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 861 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among botanical and horticultural nonprofits, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “botanical and horticultural nonprofits”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names botanical and horticultural nonprofits), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among botanical and horticultural nonprofits, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 3,896 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 15, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names botanical and horticultural nonprofits, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many botanical and horticultural nonprofits are there based in the United States?

RevenueBase identified 861 botanical and horticultural nonprofits headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

NEW York Botanical Garden, headquartered in Bronx, tops this list with the largest team on record.

Which city has the most botanical and horticultural nonprofits?

New York leads with 15 headquartered companies, followed by Portland (14) and San Francisco (13).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 3,896 verified decision-maker contacts tracked across these 861 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 15, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.