Company lists · Data refreshed September 2026
Top 25 Heirloom seed companies worldwide
RevenueBase identified 226 heirloom seed companies worldwide as of September 2026 and tracks 1,838 professional contacts across them, including 609 with verified work emails. The United States is the largest market and Broomfield the largest hub.
This list covers heirloom seed companies worldwide, 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 20, 2026. Country and city lists for heirloom seed companies follow the table.
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.
The 25 largest heirloom seed companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 202 contacts → | ||||
Partial evidence “Johnny’s Selected Seeds is a privately held, employee-owned seed producer and merchant headquartered in Winslow, Maine, USA.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 181 contacts → | ||||
Indirect evidence “W.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 93 contacts → | ||||
Partial evidence “Keithly-Williams Seeds' mission is to maintain and build a long-term retail vegetable seed business that has growth, profitability and which is an integral part of the business…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 61 contacts → | ||||
Strong evidence “Seed Savers Exchange is a nonprofit organization leading in preserving and distributing heirloom vegetables, herbs, flowers and plants.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 48 contacts → | ||||
Partial evidence “We have Australia's largest range of heirloom vegetables, cottage flowers and fruit plants that can be delivered direct to your door.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 46 contacts → | ||||
Partial evidence “We are proud to be one of the few truly independent seed companies remaining.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 44 contacts → | ||||
Partial evidence “Row 7 is an organic food company built to reimagine food from seed to table.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 44 contacts → | ||||
Strong evidence “Baker Creek Heirloom Seed Company offers thousands of heirloom seed varieties.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 39 contacts → | ||||
Partial evidence “High Mowing Organic Seeds is an organic, non-GMO leader in the seed, farming and food community who cares deeply about the need to grow nutrient rich healthy food for the world…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 34 contacts → | ||||
Partial evidence “With a great passion for organic farming, De Bolster is specialised in breeding and propagation of organic seeds.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 31 contacts → | ||||
Partial evidence “Serving 300+ customers in more than 90 countries around the world, SUBA SEEDS is a leading Seeds Production and Trading company based in Longiano, Italy.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 29 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 28 contacts → | ||||
Indirect evidence “Avec de plus de 1 800 variétés et espèces de semences biologiques, libres de droits et reproductibles, notre gamme – la plus grande d’Europe – préserve et promeut la biodiversité…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 26 contacts → | ||||
Partial evidence “Applewood Seed Company, a 100% employee-owned company, specializes in the production of a wide variety of high-quality, open-pollinated flower seeds.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 25 contacts → | ||||
Indirect evidence “Botanical Interests was founded in 1995 out of the garage of co-owners Judy Seaborn and Curtis Jones.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 23 contacts → | ||||
Partial evidence “Eden Brothers offers over varieties of the finest seeds and bulbs available anywhere in the world.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 22 contacts → | ||||
Partial evidence “Albert Lea Seed began is an independent, family-owned seed retailer with 90 years of experience in the seed business.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 20 contacts → | ||||
Partial evidence “At Renee’s Garden we know gardening success begins with the best quality, highest germinating seeds.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 20 contacts → | ||||
Partial evidence “Floranova is a renowned specialist in the breeding & supply of F1 and open pollinated flower seed.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 16 contacts → | ||||
Partial evidence “Clifton Seed Company specializes in hybrid vegetable seeds from major U.S.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 16 contacts → | ||||
Partial evidence “Seed Production: Our team utilizes a network of professional seed growers in the Pacific Northwest’s Columbia River Basin, our country’s premier seed growing region, to produce…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 16 contacts → | ||||
Indirect evidence “Chez Dr.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 16 contacts → | ||||
Partial evidence “Condor Seed is a wholesale vegetable and herb seed production company established in 1985.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 15 contacts → | ||||
Indirect evidence “Die Bingenheimer Saatgut AG - bietet ökologisches Saatgut samenfester Sorten von Gemüse, Kräutern und Blumen- beschäftigt rund 95 Mitarbeiter:innen- hat rund 90 Gärtnereien als…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 15 contacts → | ||||
Partial evidence “KING SEEDS es una empresa familiar fundada en 1996 en Guadalajara, Jalisco, dedicada a la comercialización de semillas de hortaliza para siembra para todo el territorio nacional.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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: heirloom seed companies. 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 heirloom seed companies.
- Partial evidence
- Its own public description names part of heirloom seed companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name heirloom seed companies. 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 226 heirloom seed companies worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 609 reachable decision-makers.
Free signup · no credit card
Heirloom seed companies worldwide at a glance
As of Sep 20, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 heirloom seed companies, 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.
- Coverage
- Every country. Country and city lists for heirloom seed companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “heirloom seed companies”. 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 heirloom seed companies), 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 heirloom seed companies, and records with no verified work email.
- 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, 609 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 20, 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.
Heirloom seed companies by location
1 lists · largest firstEvery Heirloom seed companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 heirloom seed companies, 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 heirloom seed companies are there worldwide?
RevenueBase identified 226 heirloom seed companies worldwide 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?
Johnny's Selected Seeds, headquartered in Winslow, tops this list with the largest team on record.
Which country has the most heirloom seed companies?
The United States leads with 75 companies. Every heirloom seed companies list by country and city is linked on this page.
Which city has the most heirloom seed companies?
Broomfield leads with 2 headquartered companies, followed by Denver (2) and Hodges (2).
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 609 verified decision-maker contacts tracked across these 226 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 20, 2026.
Ready to reach these companies? Verified emails and direct dials for all 226 heirloom seed companies worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
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.