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How to Join

Thank you for your interest in joining the Humic Products Trade Association (HPTA).
Membership in the Humic Products Trade Association is open to any person, company or organization with an interest in promoting the commercial trade of humic substances and who agree to abide by the HPTA Code of Ethics.

To begin, please fill out our HPTA Membership Application and Code of Ethics and submit to:

Humic Products Trade Association
Attn. Cherie Harms
Leonardite Products
PO Box 548
Williston, ND  58801

You may also email the application to Cherie Harms at
Please also include in the email, a jpeg image of your company logo for inclusion in the membership directory of the web site.  The Member Directory section is one of the most viewed areas of our site.  We strive to promote the humic industry and our Members.

Annual Membership Dues (January – December)*:
Corporations with Sales > $1M $3000
Corporations with Sales  $1M – 200K $1800
Corporations with Sales <$200K $  750
Individuals**     $50


Invoices for Membership renewals are typically sent out in December and due by January 1.

* NEW memberships will be prorated based on the month joined the HPTA.

**Individuals not associated with a corporation, including Retired persons, Students, Academics and other Supporters will have access to all membership benefits,
except they are not entitled to voting rights, nor will their contact information be listed on the web site.