Document

Revising U.S. Standards for Grades of Mushrooms

The Agricultural Marketing Service (AMS) of the Department of Agriculture (USDA) proposes to revise the U.S. Standards for Grades of Mushrooms. The proposed changes would add a ...

Department of Agriculture
Agricultural Marketing Service
  1. [Doc. No. AMS-SC-25-0056, SC-25-328]

AGENCY:

Agricultural Marketing Service, USDA.

ACTION:

Notice and request for comments.

SUMMARY:

The Agricultural Marketing Service (AMS) of the Department of Agriculture (USDA) proposes to revise the U.S. Standards for Grades of Mushrooms. The proposed changes would add a grade for portabella mushrooms, remove size from the criteria for each grade and create a separate section for size, and revise the tolerances for defects, consistent with modern production and handling practices. In addition, AMS proposes to update terminology, definitions, and defect scoring guides.

DATES:

Comments must be submitted on or before June 9, 2026.

ADDRESSES:

Interested persons are invited to submit comments by mail to the USDA, Specialty Crops Inspection Division, 100 Riverside Parkway, Suite 101, Fredericksburg, Virginia 22406; via fax to (540) 361-1199; or online at https://www.regulations.gov. Comments should reference the date and page numbers of this issue of the Federal Register . Comments will be posted without change, including any personal information provided. All comments received within the comment period will become part of the public record maintained by the Agency and will be made available to the public via https://www.regulations.gov.

FOR FURTHER INFORMATION CONTACT:

Andrew Buss at the address above, or by phone at (540) 361-1120; or fax at (540) 361-1199; or email . Copies of the proposed U.S. Standards for Grades of Mushrooms are available at https://www.regulations.gov. Copies of the current U.S. Standards for Grades of Mushrooms are available at https://www.ams.usda.gov/​grades-standards/​vegetables.

SUPPLEMENTARY INFORMATION:

Section 203(c) of the Agricultural Marketing Act of 1946 (7 U.S.C. 1622(c)) directs and authorizes the Secretary of Agriculture “[t]o develop and improve standards of quality, condition, quantity, grade, and packaging, and recommend and demonstrate such standards in order to encourage uniformity and consistency in commercial practices.”

AMS is committed to carrying out this authority in a manner that facilitates the marketing of agricultural commodities and makes copies of official standards available upon request. The U.S. Standards for Grades of Fruits and Vegetables that no longer appear in the Code of Federal Regulations (CFR) are maintained by AMS at http://www.ams.usda.gov/​grades-standards. AMS is proposing revisions to the U.S. Standards for Grades of Mushrooms using the procedures that appear in part 36 of title 7 of the CFR (7 CFR part 36).

Background

On April 2, 2020, the American Mushroom Institute (AMI), a trade association representing growers, retailers, and shippers from the United States, petitioned AMS to revise the U.S. Standards for Grades of Mushrooms. From 2020 to 2024, AMS worked closely with AMI to provide guidance and discuss the proposal, including relevant revisions. In its petition, AMI stated that USDA standards for mushrooms do not conform to current industry practices, and no standards for “Baby Bella” or “Portabella” mushroom varieties exist. AMI also requested new definitions to cover defects that are not currently defined in the mushroom standards. AMS reviewed and incorporated recommendations from AMI's petition and subsequent feedback into this proposal, which reflects a collaborative effort between AMS and industry. The proposed updates to the standards, identified below, affect definitions, grades, size, and defects of mushrooms.

AMS thus proposes to revise the U.S. Standards for Grades of Mushrooms as follows:

A 60-day period is provided for interested persons to submit comments on the proposed grade standards. Copies of the proposed revised U.S. Standards for Grades of Mushrooms are available at http://www.regulations.gov. After the 60-day comment period, AMS will proceed in accordance with 7 CFR 36.3(a)(1)-(3).

Authority:7 U.S.C. 1621-1627.

Erin Morris,

Administrator, Agricultural Marketing Service.

[FR Doc. 2026-06971 Filed 4-9-26; 8:45 am]

BILLING CODE 3410-02-P

Legal Citation

Federal Register Citation

Use this for formal legal and research references to the published document.

91 FR 18390

Web Citation

Suggested Web Citation

Use this when citing the archival web version of the document.

“Revising U.S. Standards for Grades of Mushrooms,” thefederalregister.org (April 10, 2026), https://thefederalregister.org/documents/2026-06971/revising-u-s-standards-for-grades-of-mushrooms.