Certified State Seed Mixes

Agassiz Seed is a certified supplier of seed mixes for DOT and state projects around the region.  Below are full listings for state mixes for Minnesota, North Dakota, South Dakota, and Wisconsin.  Click on a mix name/number to see a full list of seeds used in each mix.   


MN PLANTING DATE GUIDE

SEEDING - RECOMMENDED DATES/VEGETATION TYPE

Seed Type SPRING/
EARLY
SUMMER
(see date below)
MID-SUMMER
June 30 - Aug 1
EARLY FALL
Aug 1 - Sep 10
MID-FALL
Sep 10 - Oct 15
LATE FALL
(DORMANT SEEDING)
North: Oct 15 - Frozen Soil
South: Nov 1 - Frozen Soil
SNOW
SEEDING
Feb 15 -
April 7

Warm-Season Prairie

May 15 - June 30

         

Prairie Sedges and Forbs

May 15 - June 30

         

State Native Construction Mix

Apr 1 - June 30

         

EXPECTED SUCCESS RATES

  •  
  • HIGH SUCCESS
  •  
  • MEDIUM SUCCESS
  •  
  • NOT RECOMMENDED WITHOUT
    WATERING OR FAVORABLE
    WEATHER CONDITIONS

NOTE: Many projects will have NRCS, Mn/DOT, or other specifications that will define planting dates. Variance can often be granted due to seasonal conditions.

Dates included in the tables above represent average dates for Minnesota. Planting dates may be one to two weeks later in the northern half of the state and one to two weeks earlier in southern half of the state depending on seasonal conditions. Most seed mixes contain combinations of the vegetation types listed in the table; dates should be chosen that will ensure long-term success of the entire seed mix. Local staff should use their judgement about the most appropriate planting dates.


MN 5-DIGIT NUMBERING SYSTEM EXPLANATION

THE FOLLOWING TABLE SHOWS HOW SEED MIXES ARE NUMBERED:

1ST DIGIT NATIVE/
NON-NATIVE
2ND DIGIT FUNCTION 3RD DIGIT
PLANTING AREA
4TH DIGIT HYDROLOGY 5TH DIGIT VERSION
  1.  Hybrid
  2. Introduced
  3. Native
  4. Custom
  1.  Cover Crop
  2. Mid-Term Stabilization
  3. Stormwater Facilities
  4. Wetland
  5. Grassland
  6. Woodland
  1.  Statewide
  2. South 1 /2 and West 1/3
  3. NE and North Central
  4. NW
  5. SW
  6. SE
  7. Central
  1. General
  2. Dry
  3. Dry mesic
  4. Mesic
  5. Wet mesic
  6. Seasonally flooded
  7. Saturated
  8. Emergent
  9. Submergent
  1. First version
  2. Second version
  3. Etc.

EXAMPLE SEED MIX NUMBER: 33-262 contains native species (3), is used for stormwater facilities (3), may be planted in the southern half and western third of the state (2) in areas that are seasonally flooded (6), and it is the second version (2) of this seed mix. This mix could also be used in Planting Area 7 if no regional mix is available.

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