Company lists · Data refreshed September 2026

Top 25 Soil amendment manufacturers based in the United States

Name: Soil amendment 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 18, 2026 438 companies tracked

RevenueBase identified 438 soil amendment manufacturers headquartered in the United States as of September 2026 and tracks 4,542 professional contacts across them, including 1,630 with verified work emails. Houston is the largest hub.

This list covers soil amendment 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 18, 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 18, 2026 86% judged on-target in blind review

438Companies

4,542Contacts tracked

1,630Verified emails

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The 25 largest soil amendment manufacturers based in the United States

Ranked by team size

Top 25 of 438 soil amendment manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to soil amendment 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	SUN GRO Horticulture	Indirect evidence	Agawam, MA, United StatesHQ checked Sep 18, 2026	501-1,000	344 contacts →
	Indirect evidence “About Us Sun Gro Horticulture is one of the most prominent North American horticultural companies, employing over 800 staff and serving customers worldwide.” Source: RevenueBase Database · checked Sep 18, 2026
2	Harrell's LLC	Indirect evidence	Lakeland, FL, United StatesHQ checked Sep 18, 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 18, 2026
3	Advanced Nutrients	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 18, 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 18, 2026
4	Kellogg Garden Products	Indirect evidence	Carson, CA, United StatesHQ checked Sep 18, 2026	51-200	110 contacts →
	Indirect evidence “Founded in 1925 by H.” Source: RevenueBase Database · checked Sep 18, 2026
5	Agrinos	Indirect evidence	Davis, CA, United StatesHQ checked Sep 18, 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 18, 2026
6	Agro-K Corporation	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 18, 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 18, 2026
7	Plant Health Care, INC	Indirect evidence	Holly Springs, NC, United StatesHQ checked Sep 18, 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 18, 2026
8	Horizon Ag-Products	Indirect evidence	Lakewood, CO, United StatesHQ checked Sep 18, 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 18, 2026
9	American Plant Food Corporation	Partial evidence	Galena Park, TX, United StatesHQ checked Sep 18, 2026	51-200	70 contacts →
	Partial evidence “Since 1964, American Plant Food has been providing the high-quality blends, inputs, and services required for healthy soil, as well as the knowledge growers need to achieve…” Source: RevenueBase Database · checked Sep 18, 2026
10	Turf Care Supply, LLC	Indirect evidence	Brunswick, OH, United StatesHQ checked Sep 18, 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 18, 2026
11	Midwestern Bioag	Strong evidence	Blue Mounds, WI, United StatesHQ checked Sep 18, 2026	51-200	64 contacts →
	Strong 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 18, 2026
12	Silver Creek Materials	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 18, 2026	51-200	63 contacts →
	Indirect evidence “Silver Creek Materials is a mining and composting operation in West Fort Worth, Texas.” Source: RevenueBase Database · checked Sep 18, 2026
13	Exacto	Indirect evidence	Sharon, WI, United StatesHQ checked Sep 18, 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 18, 2026
14	Foxfarm Soil & Fertilizer Company	Partial evidence	Samoa, CA, United StatesHQ checked Sep 18, 2026	51-200	52 contacts →
	Partial evidence “At FoxFarm Soil & Fertilizer Company, we are passionate about producing the finest soil mixes, fertilizers, and micro-brewed liquid plant foods.” Source: RevenueBase Database · checked Sep 18, 2026
15	Miller Chemical And Fertilizer, LLC	Indirect evidence	Hanover, PA, United StatesHQ checked Sep 18, 2026	51-200	51 contacts →
	Indirect evidence “Leader and innovator of specialty agricultural products for more than 80 years, Miller Chemical & Fertilizer, LLC is committed to providing efficient and effective performance…” Source: RevenueBase Database · checked Sep 18, 2026
16	Back To The Roots, INC	Indirect evidence	Oakland, CA, United StatesHQ checked Sep 18, 2026	11-50	51 contacts →
	Indirect evidence “Back to the Roots is an organic gardening company founded by Nikhil Arora and Alejandro Velez.” Source: RevenueBase Database · checked Sep 18, 2026
17	Actagro	Strong evidence	Fresno, CA, United StatesHQ checked Sep 18, 2026	51-200	50 contacts →
	Strong evidence “Actagro® is a premier developer, manufacturer, and marketer of environmentally sustainable soil and plant health technology solutions that enhance value for our customers globally.” Source: RevenueBase Database · checked Sep 18, 2026
18	Marion AG Service, INC	Indirect evidence	St. Paul, OR, United StatesHQ checked Sep 18, 2026	51-200	46 contacts →
	Indirect evidence “Marion Ag has been finding ways to help growers and resellers grow their business for over 50 years.” Source: RevenueBase Database · checked Sep 18, 2026
19	AGRX	Indirect evidence	Oxnard, CA, United StatesHQ checked Sep 18, 2026	51-200	46 contacts →
	Indirect evidence “AG RX is the leading independent supplier of traditional and organic crop protection and nutrient products.” Source: RevenueBase Database · checked Sep 18, 2026
20	Wedgworth's INC	Indirect evidence	Belle Glade, FL, United StatesHQ checked Sep 18, 2026	51-200	45 contacts →
	Indirect evidence “With 90+ years of experience, Wedgworth’s, Inc.” Source: RevenueBase Database · checked Sep 18, 2026
21	Garick We ARE Nature's Helper	Indirect evidence	Cleveland, KS, United StatesHQ checked Sep 18, 2026	201-500	43 contacts →
	Indirect evidence “For over four decades, Garick has been a trusted name in distributing and processing renewable natural resource products across the U.S.” Source: RevenueBase Database · checked Sep 18, 2026
22	Coast Of Maine Organic Products, INC	Partial evidence	Portland, ME, United StatesHQ checked Sep 18, 2026	51-200	40 contacts →
	Partial evidence “Coast of Maine Organic Products was founded in 1996 with the simple idea that a healthy planet needs healthy soil to sustain life.” Source: RevenueBase Database · checked Sep 18, 2026
23	The Ground UP	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	11-50	35 contacts →
	Partial evidence “Founded in 1994, The Ground Up (TGU) began with a simple goal: to supply the industry with the finest quality mulches and soils.” Source: RevenueBase Database · checked Sep 18, 2026
24	Agromin	Strong evidence	Oxnard, CA, United StatesHQ checked Sep 18, 2026	51-200	34 contacts →
	Strong evidence “Agromin, with facilities throughout California, manufactures earth-friendly soil products for farmers, government entities, landscapers and gardeners.” Source: RevenueBase Database · checked Sep 18, 2026
25	Jobe's Company	Indirect evidence	Waco, TX, United StatesHQ checked Sep 18, 2026	201-500	34 contacts →
	Indirect evidence “The Jobe’s Company is a leading marketer and producer of branded gardening products, offering fertilizers, landscape fabrics and sustainable organic solutions.” Source: RevenueBase Database · checked Sep 18, 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: soil amendment 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 soil amendment manufacturers.
Partial evidence: Its own public description names part of soil amendment manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name soil amendment 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 438 soil amendment manufacturers based in the United States

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Soil amendment manufacturers based in the United States at a glance

As of Sep 18, 2026

35.9%Verified-email coverage

10.4Average contacts per company

11-50Median size (employees)

1.8%Largest-city concentration · Houston

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

212

11-50

155

51-200

201-500

501-1,000

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 438 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 soil amendment 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 “soil amendment 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 soil amendment 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 soil amendment 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, 1,630 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 18, 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 soil amendment 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 soil amendment manufacturers are there based in the United States?

RevenueBase identified 438 soil amendment 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?

SUN GRO Horticulture, headquartered in Agawam, tops this list with the largest team on record.

Which city has the most soil amendment manufacturers?

Houston leads with 8 headquartered companies, followed by Dallas (6) and Denver (5).

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 1,630 verified decision-maker contacts tracked across these 438 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 18, 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.