Company lists · Data refreshed September 2026

Top 25 Biostimulant manufacturers based in the United States

Name: Biostimulant manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 502 companies tracked

RevenueBase identified 502 biostimulant manufacturers headquartered in the United States as of September 2026 and tracks 6,755 professional contacts across them, including 2,573 with verified work emails. Houston is the largest hub.

This list covers biostimulant manufacturers 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 29, 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 29, 2026 86% judged on-target in blind review

502Companies

6,755Contacts tracked

2,573Verified emails

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The 25 largest biostimulant manufacturers based in the United States

Ranked by team size

Top 25 of 502 biostimulant manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to biostimulant manufacturers: 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	Harrell's LLC	Indirect evidence	Lakeland, FL, United StatesHQ checked Sep 29, 2026	201-500	310 contacts →
	Indirect evidence “Harrell’s is a leading producer of quality custom blended fertilizers and distributor of plant protectants and biocontrols for golf course, turf & landscape, specialty ag, sports…” Source: RevenueBase Database · checked Sep 29, 2026
2	Valent Biosciences	Indirect evidence	Libertyville, IL, United StatesHQ checked Sep 29, 2026	201-500	309 contacts →
	Indirect evidence “Valent BioSciences is now part of Sumitomo Biorational Company, a global leader in biorational innovation serving the agricultural, public health, forestry, and environmental…” Source: RevenueBase Database · checked Sep 29, 2026
3	Verdesian Life Sciences	Indirect evidence	Cary, NC, United StatesHQ checked Sep 29, 2026	201-500	256 contacts →
	Indirect evidence “The Nutrient Use Efficiency People.” Source: RevenueBase Database · checked Sep 29, 2026
4	Advanced Nutrients	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 2026	51-200	198 contacts →
	Partial evidence “Advanced Nutrients is an international marketer and manufacturer of agricultural, home & garden, hydroponics fertilizers, and plant nutrients.” Source: RevenueBase Database · checked Sep 29, 2026
5	Hydrofarm	Partial evidence	Petaluma, United StatesHQ checked Sep 29, 2026	201-500	147 contacts →
	Partial evidence “Hydrofarm is a leading distributor and manufacturer of hydroponics equipment and supplies for controlled environment agriculture, including high intensity grow lights, climate…” Source: RevenueBase Database · checked Sep 29, 2026
6	Nursery Supplies, Inc., A Creo Company	Indirect evidence	Chambersburg, PA, United StatesHQ checked Sep 29, 2026	51-200	142 contacts →
	Indirect evidence “At Nursery Supplies Inc, a CREO Company, we deliver innovative, eco-friendly products of the highest quality to the horticulture industry.” Source: RevenueBase Database · checked Sep 29, 2026
7	Certis Biologicals	Indirect evidence	Columbia, MD, United StatesHQ checked Sep 29, 2026	51-200	133 contacts →
	Indirect evidence “Certis Biologicals: Your Partner in Biological Innovation For over 30 years, Certis Biologicals has led the way in developing, manufacturing, and delivering biological solutions…” Source: RevenueBase Database · checked Sep 29, 2026
8	Sepro Corporation	Indirect evidence	Carmel, IN, United StatesHQ checked Sep 29, 2026	51-200	133 contacts →
	Indirect evidence “SePRO Corporation is recognized as an industry leader in providing the highest level of technical services to customers who operate in specialty niche markets of the USA.” Source: RevenueBase Database · checked Sep 29, 2026
9	Valley Agronomics, LLC	Indirect evidence	Rupert, ID, United StatesHQ checked Sep 29, 2026	501-1,000	127 contacts →
	Indirect evidence “Valley Agronomics, LLC is an agronomy company dedicated to improving performance of crops, while helping to improve sustainability of farming practices, and reducing the impact of…” Source: RevenueBase Database · checked Sep 29, 2026
10	PRO Farm Group	Indirect evidence	Davis, CA, United StatesHQ checked Sep 29, 2026	51-200	113 contacts →
	Indirect evidence “Pro Farm Group Inc.” Source: RevenueBase Database · checked Sep 29, 2026
11	Invaio	Indirect evidence	Cambridge, MA, United StatesHQ checked Sep 29, 2026	51-200	111 contacts →
	Indirect evidence “As a breakthrough agriculture biotech company, we bring innovative, nature-positive crop health technologies to support growers in tackling the biggest threats to their crops.” Source: RevenueBase Database · checked Sep 29, 2026
12	Agroliquid	Indirect evidence	Saint Johns, MI, United StatesHQ checked Sep 29, 2026	51-200	98 contacts →
	Indirect evidence “For more than 40 years AgroLiquid has been on a mission to engineer the best liquid fertilizer products while safeguarding your crops, the soil, and the environment.” Source: RevenueBase Database · checked Sep 29, 2026
13	Agrinos	Indirect evidence	Davis, CA, United StatesHQ checked Sep 29, 2026	51-200	95 contacts →
	Indirect evidence “Agrinos, An American Vanguard Company, is a biological crop input provider committed to improving the productivity and sustainability of modern agriculture worldwide.” Source: RevenueBase Database · checked Sep 29, 2026
14	Elemental Enzymes	Indirect evidence	St. Louis, MO, United StatesHQ checked Sep 29, 2026	11-50	93 contacts →
	Indirect evidence “Elemental Enzymes Ag and Turf, is a life sciences company that discovers, develops and produces innovative products to increase crop yields.” Source: RevenueBase Database · checked Sep 29, 2026
15	Synsus Private Label Partners	Indirect evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	51-200	90 contacts →
	Indirect evidence “Synsus Private Label Partners is a leading U.S.” Source: RevenueBase Database · checked Sep 29, 2026
16	Agro-K Corporation	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 29, 2026	11-50	90 contacts →
	Partial evidence “Agro-K is a manufacturer of agricultural inputs focusing on specialty foliar micronutrients, plant growth regulators, and biological and organic farming inputs.” Source: RevenueBase Database · checked Sep 29, 2026
17	Agxplore International	Indirect evidence	Jackson, MO, United StatesHQ checked Sep 29, 2026	51-200	88 contacts →
	Indirect evidence “AgXplore® is a performance-driven plant nutrition company focused on providing technologically-advanced fertilizer management aids and agronomically-superior plant nutrition…” Source: RevenueBase Database · checked Sep 29, 2026
18	Plant Health Care, INC	Indirect evidence	Holly Springs, NC, United StatesHQ checked Sep 29, 2026	51-200	77 contacts →
	Indirect evidence “Plant Health Care is a leading provider of scientifically proven biological products for agriculture.” Source: RevenueBase Database · checked Sep 29, 2026
19	Horizon Ag-Products	Indirect evidence	Lakewood, CO, United StatesHQ checked Sep 29, 2026	51-200	73 contacts →
	Indirect evidence “Horizon Ag-Products, LLC is a science and research-driven producer of innovative plant health solutions.” Source: RevenueBase Database · checked Sep 29, 2026
20	Turf Care Supply, LLC	Indirect evidence	Brunswick, OH, United StatesHQ checked Sep 29, 2026	201-500	66 contacts →
	Indirect evidence “Turf Care Supply, LLC is the leading manufacturing and product innovator to the professional green industry since 1974.” Source: RevenueBase Database · checked Sep 29, 2026
21	Midwestern Bioag	Partial evidence	Blue Mounds, WI, United StatesHQ checked Sep 29, 2026	51-200	64 contacts →
	Partial evidence “Midwestern BioAg manufactures and distributes fertilizers that build soil health while increasing yields and nutritional quality of both food and forage.” Source: RevenueBase Database · checked Sep 29, 2026
22	Locus Fermentation Solutions	Indirect evidence	Solon, OH, United StatesHQ checked Sep 29, 2026	51-200	62 contacts →
	Indirect evidence “Locus Fermentation Solutions (Locus FS) uses patented biomanufacturing technology to deliver biological alternatives to chemicals that accelerate the profitable meeting of…” Source: RevenueBase Database · checked Sep 29, 2026
23	Bioworks	Indirect evidence	Victor, NY, United StatesHQ checked Sep 29, 2026	11-50	62 contacts →
	Indirect evidence “BioWorks provides integrated plant health management products and programs to customers in the horticulture and specialty agriculture markets.” Source: RevenueBase Database · checked Sep 29, 2026
24	Exacto	Indirect evidence	Sharon, WI, United StatesHQ checked Sep 29, 2026	51-200	61 contacts →
	Indirect evidence “Exacto®, LLC has over forty years of experience working with the agricultural industry to deliver innovative and cost-effective solutions for farmers’ crop protection needs all…” Source: RevenueBase Database · checked Sep 29, 2026
25	HUMA	Indirect evidence	Gilbert, AZ, United StatesHQ checked Sep 29, 2026	51-200	55 contacts →
	Indirect evidence “Inspired by one of earth’s most precious resources, humus, we harness the power of ancient sunlight to vitalize life in the soil, crops and water.” Source: RevenueBase Database · checked Sep 29, 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: biostimulant manufacturers. 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 biostimulant manufacturers.
Partial evidence: Its own public description names part of biostimulant manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name biostimulant manufacturers. 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 502 biostimulant manufacturers based in the United States

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Biostimulant manufacturers based in the United States at a glance

As of Sep 29, 2026

38.1%Verified-email coverage

13.5Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · Houston

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

236

11-50

190

51-200

201-500

501-1,000

1,001-5,000

10001+

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 502 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 biostimulant manufacturers, 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 “biostimulant manufacturers”. 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 biostimulant manufacturers), 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 biostimulant manufacturers, 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, 2,573 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 29, 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 biostimulant manufacturers, 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 biostimulant manufacturers are there based in the United States?

RevenueBase identified 502 biostimulant manufacturers 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?

Harrell's LLC, headquartered in Lakeland, tops this list with the largest team on record.

Which city has the most biostimulant manufacturers?

Houston leads with 10 headquartered companies, followed by Denver (8) and Miami (7).

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 2,573 verified decision-maker contacts tracked across these 502 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 29, 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.