img PO Box 548, Williston, North Dakota 58801
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Leonardite Products


Location: Williston, ND
Business Form: Mine, Processor
Markets Served: Agriculture, Turf & Ornamental, Retail Lawn & Garden, Mining Reclamation, Remediation, Oil Industry
Web Address:

Description of Company:
Leonardite Products mines and processes leonardite, a natural source of humates, in Northwestern North Dakota. The dry line of leonardite, called Source , is available in four different grades. The liquid products Humi-Source and Source-Ful are blended for use by manufacturers and or wholesalers. This mine and processing plant have been in business since 1964 although has been operating as Leonardite Products since 2008.

Source 11
Source Crushed
Source Coarse
Humi-Source Plus

Cherie Harms, President
Business Phone: 701.572.7659
Mobile Phone: 701.471.2704