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Membership: Dues and Renewals


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.

Membership Application Process Steps:

  1. Download and complete the HPTA Membership Application and Code of Ethics. Both documents need to be reviewed, completed, and signed.
  2. Return the Application and Code of Ethics to Cherie Harms, either by email or postal mail.
    a) Email:
    Cherie Harms at
    b) Postal Mail:
    Humic Products Trade Association
    Cherie Harms
    Leonardite Products
    PO Box 548
    Williston, ND  58801
  3. Payment:
    Submit Membership Dues Payment. Dues are based on corporate annual revenue and stated in U.S. dollars.
    Payments (includes Annual Membership Renewals) should be mailed to the address above.

FOR USA based companies, corporations and residents only:
Paying Membership dues via the PayPal links below is also an option.
The PayPal process below will refer to the Membership Dues as a “product”.
If this is a renewal and you have received an invoice, please note the invoice # in the “Order Notes” section so that the payment can be applied to that invoice.

You will be notified by email, the status of your Membership Application when all three (3) steps have been completed.

Other important details:
Please include a jpeg image of your company logo for use 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.

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

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

To qualify as for an Individual Membership listed below, you must 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.


ANNUAL (January – December) MEMBERSHP DUES
This option is only available for USA companies .  We can not process other currencies.  Thank you for understanding.

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