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Common Questions


Does a grower have to sign a Clearfield Commitment?

Yes. The Clearfield® Commitment is an agreement between the grower and BASF that outlines both parties’ responsibilities and serves as an annual license to access the benefits of proprietary Clearfield technology. By signing the Commitment, a grower is eligible for BASF crop protection product discounts through the BASF Ag Rewards Program.


In addition to the cost of the seed, there is a Clearfield Commitment Fee associated with the purchase of Clearfield sunflower seed, equal to $7/acre. This fee supports continued investment, development and acceleration of BASF trait-based innovations (i.e. more Clearfield crops, hybrids, varieties and herbicides), ultimately ensuring the delivery of more innovative products and opportunities for growers.

Can a grower re-seed Clearfield sunflower seed?

No. In accordance with the Clearfield Commitment for Clearfield sunflowers, growers must not re-grow themselves, or supply Clearfield sunflower seed to other growers or users for production in future years. Certified Clearfield sunflower seed must be purchased for each year of production from a Clearfield retailer, and a Clearfield Commitment form must be signed for the seed purchased.

Are the Clearfield sunflower varieties genetically engineered?

No. All Clearfield crops, including Clearfield sunflowers, are developed using the same traditional plant-breeding methods that have been used to develop commercial crop varieties for decades. As a result, Clearfield crops are internationally recognized as non-genetically engineered, since they contain no introduced genetic material, thus eliminating any marketing barriers.

Which herbicides can be used on Clearfield sunflowers?

Clearfield sunflowers have herbicide tolerance to SOLO® herbicide.

Will additional herbicides be registered for use on Clearfield sunflowers?

As part of the BASF commitment to the development of new innovations, such as new variety and herbicide options, Clearfield sunflower growers can anticipate new Clearfield sunflower herbicide options over the next few years as the system continues to develop.

What crops can be grown the year after using SOLO herbicide?

The following crops can be grown the year after using SOLO herbicide:

  • Canary seed

  • Durum wheat

  • Spring barley

  • Field peas

  • Spring wheat

  • Winter wheat

  • Tame oats

  • Flax

  • Canola

  • Lentils

  • Clearfield lentils