Ultrastrike® Pelleted Swede Seed

Focus on better outcomes.

With a weighted build-up coating (pellet), Ultrastrike® pelleted swede seed can be sown using precision drills. Yield is maximised through the even distribution of seed, sown at the correct rate and depth, which allows bulbs to grow more consistently and be protected from sun exposure or being eaten by birds or pests.

For farmers with a focus on outcomes over inputs, Ultrastrike® pelleted swede is a fantastic way to increase yields as long as they’re prepared to do the necessary paddock preparation and ongoing monitoring of the crop.

Ultrastrike® pelleted swede has an optimum sowing rate of 90,000 seeds/ha or 22 cm seed spacing in 50 cm rows. The size specification for pelleted swede seed is 3.25-4.00 mm.

*Based on Cleancrop™ Hawkestone swede crop at $1400/ha yielding 19,000 kgDM/ha. See the case study below for more information.

Key benefits 

  • Maximum bulb yield through evenlydistributed sowing
  • Highly cost-effective outputs
  • Easy to sow (one bucket/ha)
  • Contains trace element molybdenum for enhanced growth
Sales Agronomist Brian Young holding a Ultrastrike® precision sown pelleted Cleancrop™ Hawkestone swede.


With the seeds’ weighted build-up coating, oxygen and moisture from the soil penetrate the pellet, initiating germination. The pellet then splits open as the seed expands and begins to sprout. The pellet does not require any more soil moisture than a non-pelleted seed and is lightweight yet hardy enough to remain undamaged during transportation and sowing. The pellet does not persist in the soil as it breaks down completely over time.

Our range

Hawkestone swede (Part of the Cleancrop™ Brassica System)

  • High yielding yellow-flesh swede with medium maturity
  • Clubroot and dry rot tolerant
  • Good leaf disease tolerance
  • Plant glucosinolate levels similar to Aparima Gold Swede (Three main glucosinalates: progoitrin, glucobrassicin and neoglucobrassicin) 

The Cleancrop™ Brassica System controls 23 key problem weeds that take away moisture and nutrients from a crop. With the competition down, yield goes up. Combining the power of broad-spectrum herbicide and plants bred to resist it, Cleancrop™ maximises crop performance.

*Three main glucosinolates: progoitrin, glucobrassicin and neoglucobrassicin


Clutha Gold swede

  • Very high yielding main crop with a potential of 18,000 kgDM/ha
  • New Zealand bred and evaluated
  • ellow-fleshed bulb with medium maturity
  • Clubroot and dryrot tolerant
  • Excellent winter keeping qualities


Major plus swede

  • The softest bulb swede on the market
  • Early maturing main swede crop
  • Good yielding swede with a potential yield of 16000 kgDM/ha
  • Yellow-fleshed, light purple-skinned bulb
Clutha Gold Ultrastrike® pelleted swede.

Ultrastrike® seed treatment

Pest and disease protection

Ultrastrike® pelleted seed also contains a systemic insecticide and two contact fungicides to provide critical insect and disease protection during establishment.

Seedling diseases
  • Pythium
  • Fusarium
  • Rhizoctonia
Insect pests
  • Springtails
  • Aphids
  • Argentine Stem Weevil
  • Nysius
Learn more about Ultrastrike®

Trial results 

A trial evaluating precision planting of Cleancrop™ Hawkestone pelleted swede (90,000 seeds/ha) versus conventional sowing (1 kg/ha) was established in Oxford, Canterbury on 17 November 2018. Prior to grazing on 20 May 2019 (184 days after sowing), yield assessments demonstrated that precision-sown pelleted seed provided a significant 12% increase in yield relative to conventional sowing.

Relative dry matter production of precision planting pelleted swede versus conventional drilling of Cleancrop™ Hawkestone swede

Trial conducted in Oxford, North Canterbury. Sown on 17 November 2018 and harvested on 20 May 2019 (184 DAS), LSD (5%)= 10.7%

It's what's on the outside that counts

Where: Ohai, Southland
Farm type: Sheep, beef and dairy support
Who: Paul and Wendy Stirling 

Paul and Wendy Stirling operate Wether Hill farm in Ohai, Southland. Traditionally, they use swedes and kale as a source of winter feed, growing 75ha in total. In addition, they often incorporate 5ha of fodder beet into the cropping rotation.

In the past, their swede crops had achieved a 10-12 tonne yield. However, they made the decision to precision drill their swede crops after discussions with their contractor and local retailer representative about trying to increase the yield in the 2017 spring season. They chose the Cleancrop™ Brassica System (Hawkestone pelleted swede) and they increased their yield dramatically. Specifically, they had a 19,000 kgDM/ha crop, established for  $1,400/ha, ultimately providing feed for just 7c/kgDM! Paul says, along with the large even bulb size, he is also impressed with how quick the pelleted seed germinates and gets out of the ground compared to traditional seed.

In terms of paddock preparation and crop maintenance, they plough, heavy roll, then apply lime at 2.5 tonne/ha and 300 kgs of superphosphate that is worked in with discs and harrows before precision drilling. More fertiliser is broadcast on afterwards, typically a DAP Boron mix (250 kgs/ha) followed by dressing of urea at canopy closure.

Paul says he gets great payback on the extra investment of precision sowing. The Stirlings have been grazing R1s and hoggets on the Cleancrop™ Hawkestone pelleted swede and have noticed how palatable the stock find it, and their performance has been good too. The Stirlings’ experience proves the potential to lift yields significantly far outweighs any extra cost or effort involved.


Paul and Wendy Stirling, Ohai, Southland