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California Crop Improvement Association
California Crop Improvement Association
California Crop Improvement Association
University of California
California Crop Improvement Association

Seed Lot Blend Information

Blend Definitions

     

InDirt Blend - co-mingling of harvested seed of a single variety from fields that have been inspected and passed as a class of certified seed but were assigned different certification numbers. The CCIA must receive approval from all applicants providing seed for the blend by submission of the Applicant Approval for In-Dirt Blend form.

 

Lot Blend - seed lots of the same variety. A lot blend is made by blending different lots of the same variety. Such as different lots of CUF 101 alfalfa OR different lots of Cal Rojo wheat. If approved, an email will be sent back with approval and a blend number.

 

Varietal Blend - seed lots of different varieties of one crop type. A varietal blend is made by blending seed lots of different varieties of the same kind of seed and marketed as a “Named Varietal Blend” of certified seed. Such as "Colossus" blend of alfalfa created from 3 different alfalfa varieties. The CCIA staff will verify component varieties, percentages, and certification status in the requested blend. If approved, you will receive with conditional approval and a blend number. The blend may then be completed, bagged, and tagged. A representative seed sample must be sent to the CCIA for analysis. The blend must be held on the premises until the final approval letter from the CCIA is received.

 

Mixture different crop types blended together to form a mixture. A mixture is a combination of seed lots from two or more kinds (species) of seed and marketed as a “Mixture of certified seed”. The mixture may contain two or more varieties of the same species. Example of a pasture mixture may contain several seed lots of clover, vetch, and grasses.

All blends must meet the following criteria:

All blends must meet the following criteria:

  1. A written blend request (from a conditioner or broker) must conform to all blend requirements.
  2. Approval for the varietal blend will be in the form of a letter from the CCIA.
  3. A 100 gram sample of each component variety must be submitted upon approval of the blend by the CCIA.
  4. All blend formulas shall be recorded by the CCIA and shall not vary between lots and years.
  5. Only certified seed of each component variety shall be used in a seed blend
  6. Permission to use a protected or proprietary variety must be obtained from the breeder or owner of that variety for each blend requested.
  7. Only CCIA approved conditioners that demonstrate the ability to blend/mix within specific tolerances will be permitted to do varietal blending or mixing.
  8. Each component of the blend must be 15% or greater of the total weight. This will limit the maximum number of components to 6.
  9. Each component must be present in increments of 5% (e.g. not 3% or 8%).
  10. There must be at least 15% difference in the amounts of each component from other similar blends.

Correct examples:

 

Variety A

Variety B

Variety C

Blend 1

35%

65%

 

Blend 2

50%

50%

 

Blend 3

15%

85%

 

Blend 4

30%

55%

15%

Incorrect examples:

 

Variety A

Variety B

Variety C

Error

Blend 1

35%

65%

 

No error - used for comparison below

Blend 5

45%

55%

 

 Must be >15% different from other blends (such as Blend 1)

Blend 6

18%

82%

 

 Must be in increments of 5%

Blend 7

30%

60%

10%

 Must be in increments of 15%

Blend sample form submission:

  1. The conditioner/broker will submit a blend form which identifies each individual lot and variety along with calculated analysis.
    1. The CCIA will verify component varieties and percentages in the requested blend.
    2. The CCIA will verify the certification status of each component lot. If a rejected lot is included in the approved blend, certification fees will be charged for that component lot.
    3. The CCIA will issue written conditional approval at this time.
  2. In order to receive final approval of the blend:
    1. The conditioner will physically blend, bag, and tag the varietal blend.
    2. The conditioner will take a representative seed sample for analysis. The conditioner or laboratory will forward the seed analysis results to the CCIA for final approval.
    3. The conditioner will forward a 1,000 gram seed sample to the CCIA for audit or verification purposes (seed or genetic testing).
    4. The blend must be held on the premises until the final approval letter from the CCIA is received.
  3. If the blend lot fails to meet certification standards, the certification tags must be removed and returned to CCIA.
  4. The CCIA will issue a written final approval letter and seed can be moved.

Labeling:

  1. Blends must be tagged in a manner compliant with the Federal Seed Act and AOSCA operating procedures.
    1. The certification label must carry the phrase "Blend of Certified Seed".
    2. Each tag shall include either the blend/certification number or a series number in the case of series tags. The fictitious varietal blend “Colossus” is used in the examples below.

Certification Tag

Colossus Alfalfa Blend
Blend of Certified Seed
Blend/Certification/Lot Number
OR
Colossus Blend
Blend of Certified Alfalfa Seed
Blend/Certification/Lot Number

cert tag1

 

Series Certification Tag

Colossus Alfalfa Blend
Blend of Certified Seed
(Lot number optional)
Series Number
OR
Colossus Blend
Blend of Certified Alfalfa Seed
(Lot number optional)
Series Number

cert tag2

 

Interagency Certification Tag

Colossus Alfalfa Blend
Blend of Certified Seed
Blend/Certification/Lot Number
Interagency certification – Australia, Arizona, California, Idaho seed
OR
Colossus Blend
Blend of Certified Alfalfa Seed
Blend/Certification/Lot Number
Interagency certification – Australia, Arizona, California, Idaho seed

cert tag3

 

 

Interagency Series Certification Tag

Colossus Alfalfa Blend
Blend of Certified Seed
(lot number optional)
Interagency certification – Australia, Arizona, California, Idaho seed
Series number
OR
Colossus Blend
Blend of Certified Alfalfa Seed
(lot number optional)
Interagency certification – Australia, Arizona, California, Idaho seed
Series number

cert tag4

 

Grow outs:

  1. The 1,000 gram seed sample sent to the CCIA for audit or verification purposes may be entered into genetic grow out tests conducted/authorized by the CCIA or evaluated by the CCIA to verify seed lab analysis.
  2. Other seed certification agencies may submit varietal blend samples for genetic grow out tests and/or lab analysis verification on a fee basis.

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