2026-17309Notice

Feds Upgrade Official Standards for Grading Your Portabella Mushrooms

Published Date: 8/25/2026

Notice

Summary

The Agricultural Marketing Service (AMS) of the Department of Agriculture (USDA) is revising the U.S. Standards for Grades of Mushrooms to 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 is updating terminology, definitions, and defect scoring guides throughout the grade standards. These changes align the grade standards with modern harvesting practices and provide guidance for the effective utilization of this commodity.

No Economic Impacts Identified for this Document

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Key Dates

Published Date
Effective Date
8/25/2026
9/24/2026

Department and Agencies

Department
Independent Agency
Agency
Agriculture Department
Agricultural Marketing Service
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