The 2020-21 Calendar

Western Growers supports the continuous improvement of the LGMA-approved leafy green food safety guidelines. Western Growers maintains a Master Calendar to facilitate a systematic amendment process. On January 9, 2020 Western Growers published the 2020-2021 calendar. This year the first topics for review include agricultural water and field sanitation.

While Western Growers publishes a Master Calendar to facilitate an organized review of the complete LGMA-approved leafy green food safety guidelines. stakeholders are free to leave comments and propose changes on any area of the document even if it is not currently being reviewed.

Notable Dates:


  • Propose a Change
    • Soil Amendments – TBD
    • CAFOs – TBD
    • Other Sections – TBD


  • Proposed Changes
    • Water – April 6th – May 4th, 2020
    • Field Sanitation– May 4th – June 12th, 2020
  • Web Discussions
    • Water Part 1 – May 14th, 2020
    • Water Part 2 – May 22nd, 2020
    • Water Part 3 – June 4th, 2020
    • Water Part 4 – June 11th, 2020
    • Field Sanitation – June 24th, 2020
    • Field Sanitation – July 1st, 2020
  • Comment Periods
    • Water – up to June 14th, 2020
    • Field Sanitation – up to June 27th, 2020

Participate in the Process

Propose a change to the guidelines or visit our Submissions Page to review submitted proposals and leave comments.

Propose Change

About the Leafy Green Food Safety Guidelines Amendment Process

Since the inception of the California and Arizona Leafy Green Marketing Agreements (LGMAs), Western Growers (WG) has been at the forefront of developing and revising the written “Commodity Specific Food Safety Guidelines for the Production and Harvest of Lettuce and Leafy Greens” – for the leafy greens industry in California and Arizona.

As an industry leader in produce safety, WG remains committed to driving the evolution of guidance for preventive food safety programs in leafy greens as well as other commodities.

To facilitate this process, ensure broad industry engagement and issue complete transparency, WG, in direct partnership with the Arizona and California LGMAs, manages a systematic amendment process based on a yearly calendar. The food safety guidelines, adopted by the LGMAs, impact the way leafy greens are farmed in California and Arizona and therefore must be based on credible science balanced with practical field implementation.

Proposed changes must meet LGMA criteria to be considered. Proposals should be 1) comprehensive and auditable by government auditors, 2) accompanied by a statement on how proposed changes will enhance food safety, and 3) include a clear and straightforward scientific basis or rationale, including citations of relevant research if available.

WG invites all stakeholders interested in leafy greens food safety practices to engage in this process.

The Process

Western Growers Association receives proposed changes and/or comments based on the Master Calendar. The Master Calendar provides a timeframe of all announced comment periods and web discussions.

After each discussion and comment period, WG will summarize and present all materials (suggestions, changes, comments, attendance records, etc.) to both the Arizona LGMA Technical Subcommittee and California LGMA Technical Committee. If approved by their respective committees, both the Arizona and California’s LGMAs then use the materials supplied by WG to update documents and procedures.

The Entire Process at a Glance

From the time a comment period opens to the time a proposed change may become official and included in the Leafy Green Guidelines.Western Growers only facilitates STEPS 1 and 2.
STEPS 3 and 4 are executed by the AZ or CA LGMAs.

Step 1

Proposed changes and/or comments are submitted and reviewed for consideration and discussion.

Step 2

Proposed changes and/or comments are vetted and then presented to the Arizona and California Committees for review and consideration.

Step 3

The Arizona and California Committees review, discuss, and recommend proposed changes that meet the LGMA criteria to the LGMA Boards for final review and approval.

Step 4

If approved by the Arizona and/or California LGMA Boards, become official and the leafy green document(s) and/or audit checklist are updated, published, and distributed.

Facts About Western Growers Amendment Process

  • Western Growers engages a comprehensive distribution list that includes growers, shippers, handlers, suppliers, universities, buyers, and all entities interested in this review process. Subscribers receive updates about the process, including reminders about web-based discussions. To be added or removed from the list, please email us at

  • Prior to scheduled discussions, Western Growers opens a 30-day comment period for each area of discussion. During that time changes may be proposed and comments on proposed changes or the existing standards may be submitted. Proposed changes must meet LGMA criteria for consideration.

  • Once the comment period closes, Western Growers hosts web-based meetings to present and facilitate a discussion of all proposed changes and comments. These web discussions are a key step in the process allowing stakeholders to share different perspectives, discuss practical considerations, and support or speak against proposed changes. It is all part of an open, collaborative and transparent vetting process.

  • Comments on proposed changes are accepted before, during and up to two weeks after each web-based meeting.

Please send comments, questions and feedback about this website and/or the WGA’s amendment process to the WGA’s Science & Technology Team.

Contact Us