Clearfield® sunflowers offers you the first non-GMO and herbicide-tolerant sunflower production system in Canada. Now you can increase your profit potential through exceptional seed genetics and superior weed control.

Weed Management

Weed control and suppression when Solo® is applied at the 40 acre rate

Weed Type Solo
Barnyard Grass Control
Green foxtail (wild millet) Control
Persian darnel Control
Volunteer barley Control
Volunteer canary seed Control
Volunteer durum wheat Control
Volunteer spring wheat* Control
Volunteer tame oats Control
Wild oats Control
Yellow foxtail Control
Japanese brome Suppression
Cow cockle Control
Green smartweed Control
Lamb’s-quarters Control
Redroot pigweed Control
Shepherd's-purse Control
Stinkweed Control
Volunteer canola* Control
Wild mustard Control
Cleavers Suppression
Kochia** (up to 4 whorls) Suppression
Wild buckwheat Suppression

* Non-Clearfield wheat only
** Does not include Group-2 resistant Kochia

BASF Ag Solutions Customer Care

Got questions? Talk to our team of experts to get the best advice and solutions for your needs and operation.

BASF Ag Rewards

Take advantage of BASF Ag Rewards Program and maximize your savings on premium BASF crop solutions products.


Uncompromising seed genetics

Clearfield® sunflowers offer the same great agronomics of conventional oilseed and confectionary sunflower varieties with the added benefits and flexibility of herbicide tolerance.

Six Clearfield sunflower varieties are now available. Each includes leading agronomic traits and yield characteristics that include tolerance to Clearfield herbicides.

Clearfield sunflowers are recognized worldwide as non-GMO.

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


Overview of the Clearfield® Commitment for sunflowers.

The Clearfield Commitment, an agreement between the grower and BASF, is an important part of growing Clearfield sunflowers. Not only does it serve as a licence allowing the grower to access the benefits of the Clearfield trait, it also preserves the integrity of the Clearfield trait, delivering the same level of germination and vigour you’ve come to expect from the Clearfield system.

Details of the evergreen Clearfield Commitment for sunflowers.

Dedicated to improving its processes, BASF updated the Clearfield Commitment to an evergreen Commitment in 2015. That means growers who signed a Commitment in 2015 -2020 will not be required to sign again. However, growers who did not purchase Clearfield sunflowers in the listed years will need to sign a Commitment for the 2021 season.

  • Sales period for Clearfield sunflowers and registered chemistry is October 1, 2020 – September 30, 2021
  • Deadline for submitting the Clearfield Commitment form is July 9, 2021
  • Annual fee of $7 per acre when seed is purchased

The benefits of the Clearfield Production System for sunflowers.

  • Access and use Clearfield trait technology
  • Access high-performing varieties and innovative chemistry, tailoring solutions to your fields
  • BASF Ag Product Assurance and technical support for the Clearfield Production System
  • Get exclusive offers from our BASF Ag Rewards Program

Three ways to register and/or sign a Commitment.

  • With a Clearfield sunflower retailer
  • With your BASF Sales Representative
  • Call BASF Ag Solutions Customer Care at 1-877-371-BASF (2273)

For more information on the Clearfield Commitment for sunflowers, contact your BASF Sales Representative or call BASF Ag Solutions Customer Care at 1-877-371-BASF (2273).



Solo Ultra

Two modes of action for proven control of grasses and tough broadleaf weeds, with rotational freedom.

Heat LQ

Take control of your canola harvest withHeat® LQ herbicide. Tank mixed with glyphosate, it will dry down both the crop and weeds for a faster, more efficient harvest, and cleaner fields the following spring.

Solo ADV

Solo ADV herbicide provides reliable control of tough weeds with rotational freedom, in a new, convenient liquid formulation.


Solo® provides reliable control of tough grassy weeds and targeted broadleaf weeds with rotational freedom.



A more advanced fungicide that helps maximize your crop's yield potential.


Lance® fungicide moves systemically through the crop, delivering preventative protection against sclerotinia stem rot and alternaria black spot in canola.