Minnesota Department of Transportation

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Erosion Control and Stormwater Management


Seeding manual

Standards and guidance for design and construction

This replaces previous editions of the Seeding Manual and the District Vegetation Establishment Recommendations (also known as Turf Letters).


Guidance on watering for vegetation establishment for both design and construction

Planting dates

Specified planting times do not always line up with construction schedules, weather, and construction stormwater permit timelines. The Planting Dates for Seeding and Sodding fact sheet is now part of the Seeding Manual (PDF).  This section of the manual explains how to apply the standard seeding and sodding dates and when to allow exceptions to them.


Approved Vendors

MnDOT specifications require seed to be purchased from MnDOT Approved Seed Vendors. 

Seed Substitutions

MnDOT seed mixes contain a diversity of species and not all of them are always available. Substitutions must be approved.

Native seed certification and availability is a survey of source-identified (yellow tag) seed. It is used by vendors to find what is available before requesting substitutions.

Turf Grass Variety Approval Process

The New Turf Grass Variety Preliminary Information Form (PDF) should be used by vendors who would like to make a request for adding a variety to the approved list of turf grass varieties. The form also includes information on the timing for new variety requests and approvals as well as the type of field trial data that should be submitted to make approvals of new varieties.

Vegetation establishment recommendations (obsolete)

The district-specific Vegetation Establishment Recommendations, also known as the Turf Letters, have been replaced by the Seeding Manual (PDF)

Specialty seed mixtures

The seed mix design manual can be used to create site specific specialty seed mixes. This is for projects with unusual conditions or unique environmental commitments where the standard MnDOT Seed Mixes will not work.