Company lists · Data refreshed September 2026

Top 25 Organic soil amendment manufacturers based in the United States

Name: Organic 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 17, 2026 486 companies tracked

RevenueBase identified 486 organic soil amendment manufacturers headquartered in the United States as of September 2026 and tracks 4,235 professional contacts across them, including 1,544 with verified work emails. Houston is the largest hub.

This list covers organic 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 17, 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 17, 2026 86% judged on-target in blind review

486Companies

4,235Contacts tracked

1,544Verified emails

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The 25 largest organic soil amendment manufacturers based in the United States

Ranked by team size

Top 25 of 486 organic soil amendment manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to organic 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 17, 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 17, 2026
2	Harrell's LLC	Indirect evidence	Lakeland, FL, United StatesHQ checked Sep 17, 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 17, 2026
3	Advanced Nutrients	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 17, 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 17, 2026
4	Kellogg Garden Products	Indirect evidence	Carson, CA, United StatesHQ checked Sep 17, 2026	51-200	110 contacts →
	Indirect evidence “Founded in 1925 by H.” Source: RevenueBase Database · checked Sep 17, 2026
5	Agrinos	Indirect evidence	Davis, CA, United StatesHQ checked Sep 17, 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 17, 2026
6	American Plant Food Corporation	Partial evidence	Galena Park, TX, United StatesHQ checked Sep 17, 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 17, 2026
7	Turf Care Supply, LLC	Indirect evidence	Brunswick, OH, United StatesHQ checked Sep 17, 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 17, 2026
8	Midwestern Bioag	Strong evidence	Blue Mounds, WI, United StatesHQ checked Sep 17, 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 17, 2026
9	Silver Creek Materials	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 17, 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 17, 2026
10	HUMA	Partial evidence	Gilbert, AZ, United StatesHQ checked Sep 17, 2026	51-200	55 contacts →
	Partial 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 17, 2026
11	Foxfarm Soil & Fertilizer Company	Partial evidence	Samoa, CA, United StatesHQ checked Sep 17, 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 17, 2026
12	Back To The Roots, INC	Partial evidence	Oakland, CA, United StatesHQ checked Sep 17, 2026	11-50	51 contacts →
	Partial evidence “Back to the Roots is an organic gardening company founded by Nikhil Arora and Alejandro Velez.” Source: RevenueBase Database · checked Sep 17, 2026
13	Nitricity	Indirect evidence	Fremont, CA, United StatesHQ checked Sep 17, 2026	11-50	51 contacts →
	Indirect evidence “Let's Grow Together” Source: RevenueBase Database · checked Sep 17, 2026
14	AGRX	Partial evidence	Oxnard, CA, United StatesHQ checked Sep 17, 2026	51-200	46 contacts →
	Partial evidence “AG RX is the leading independent supplier of traditional and organic crop protection and nutrient products.” Source: RevenueBase Database · checked Sep 17, 2026
15	JH Biotech, INC	Indirect evidence	Ventura, CA, United StatesHQ checked Sep 17, 2026	51-200	44 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
16	Garick We ARE Nature's Helper	Indirect evidence	Cleveland, KS, United StatesHQ checked Sep 17, 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 17, 2026
17	Coast Of Maine Organic Products, INC	Strong evidence	Portland, ME, United StatesHQ checked Sep 17, 2026	51-200	40 contacts →
	Strong 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 17, 2026
18	The Ground UP	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 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 17, 2026
19	Agromin	Strong evidence	Oxnard, CA, United StatesHQ checked Sep 17, 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 17, 2026
20	Jobe's Company	Partial evidence	Waco, TX, United StatesHQ checked Sep 17, 2026	201-500	34 contacts →
	Partial 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 17, 2026
21	Pearl Valley Farms	Partial evidence	Pearl City, IL, United StatesHQ checked Sep 17, 2026	51-200	33 contacts →
	Partial evidence “Pearl Valley Farms is a global food and lawn & garden company, specializing in organic and specialty products.” Source: RevenueBase Database · checked Sep 17, 2026
22	Bio-Gro, INC	Indirect evidence	Mabton, WA, United StatesHQ checked Sep 17, 2026	11-50	30 contacts →
	Indirect evidence “For 30 years Bio-Gro Inc.” Source: RevenueBase Database · checked Sep 17, 2026
23	The Organic Recycler	Strong evidence	Forest Hill, TX, United StatesHQ checked Sep 17, 2026	51-200	30 contacts →
	Strong evidence “The Organic Recycler recycles organic landscape waste into mulch, compost, and blended soils.” Source: RevenueBase Database · checked Sep 17, 2026
24	Pittmoss	Partial evidence	Ambridge, United StatesHQ checked Sep 17, 2026	11-50	30 contacts →
	Partial evidence “PittMoss produces next-generation gardening amendments and mixes.” Source: RevenueBase Database · checked Sep 17, 2026
25	St. Louis Composting	Partial evidence	Valley Park, MO, United StatesHQ checked Sep 17, 2026	51-200	28 contacts →
	Partial evidence “As any seasoned gardener or landscaper knows, the most important thing you can do to enhance a lawn or garden is to cultivate better soil.” Source: RevenueBase Database · checked Sep 17, 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: organic 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 organic soil amendment manufacturers.
Partial evidence: Its own public description names part of organic 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 organic 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 486 organic soil amendment manufacturers based in the United States

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Organic soil amendment manufacturers based in the United States at a glance

As of Sep 17, 2026

36.5%Verified-email coverage

8.7Average contacts per company

1-10Median size (employees)

1.6%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

250

11-50

172

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 486 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 organic 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 “organic 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 organic 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 organic 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, 1,544 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 17, 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 organic 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 organic soil amendment manufacturers are there based in the United States?

RevenueBase identified 486 organic 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 organic soil amendment manufacturers?

Houston leads with 8 headquartered companies, followed by Dallas (7) and Denver (6).

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 1,544 verified decision-maker contacts tracked across these 486 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 17, 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.