Our extensive seed range offers outstanding results to meet the demands and rigours of Australian agriculture. Find the right solutions for your enterprise with S&W Seed Company.

Chomper Forage Sorghum


Sorghum x Sudan grass hybrid

Suitable for grazing, hay, haylage and greenchop

Chomper is a sorghum x Sudan grass hybrid variety

  • Large seed size
  • Good early season vigour and quick regrowth after cutting or grazing
  • High leaf to stem ratio
  • Large seed size, good emergence and seedling vigour
  • Quick to first cut or grazing due to growth rate
  • Potential to obtain multiple cuts or gazing even with later season plantings
  • Flexibility of Chomper allows the use for grazing, hay and greenchop with either sheep or cattle
Seed Agronomy Table
Maturity Medium
Life Span 9 months
Leaf Type Medium
Seeding Rate - Dryland (kg/ha) 4-8
Seeding Rate - High Rainfall/Irrigation (kg/ha) 15-20
Hard Seed Level 1 = Least Hard 10 = Most Hard • Burr Burial Strength 1 = Very Weak 10 = Very Strong
Establishment Guarantee

At S&W Seed Company Australia we’re so confident about our seed genetics and seed quality, we will replace seed at half the original purchase price if it fails to establish satisfactorily in the first thirty days*  Read more


  • Easy to establish
  • Highly productive
  • Good regrowth potential
  • Can be grown in dryland and irrigated situations
  • Can be used for grazing, hay and/or silage
  • Highly palatable resulting in better grazing utilization


  • Requires high fertility soils
  • Requires good soil water or irrigation for maximum production
  • Requires appropriate grazing management to obtain maximum potential
  • Prussic acid poisoning though the potential is low in normal seasons
  • Varietal selection must be made carefully, depending on the final use e.g. for grazing, hay production, pit silage or round bale silage

Plant Description
  • Vigorously-growing, erect, annuals with branched tillers reaching 2 to 3 metres in height.

  • Erect to 2 to 3 metres.

  • 2.5 - 4 centimetres wide.

  • Large pyramidal panicles with secondary and tertiary branches.

  • Oval to round; size varies with cultivar between 30,000 to 75,000 seeds per kilogram.

  • Grazing, hay: Suitable for repeated, heavy grazing with excellent recovery between grazing. Suited to hay making because it tillers heavily and has finer stems than other sorghums. Lower prussic acid levels than other forage sorghums.


Grown on stored subsoil water. Requires 500 to 800 millimetre rainfall or irrigation. Poor tolerance of flooding.


Performs best on heavy clay soils because of their high water holding capacity. When sown on lighter soils productivity will be reduced unless adequately fertilised and good seasonal rainfall occurs.


Sow when the soil temperature is above 16°C. Establishment.

  • It is not recommended to sow with other grasses because of its quick growth and competitive nature.

  • When soil temperatures reaches 16°C.

  • Tolerant of heavy grazing with coarse stems remaining unless grazed early. Commence grazing when plants have reached 1 to 1.5 metres in height. Slashing after grazing will promote even regrowth. Should not be grazed below 15 centimetres if good regrowth is expected. Can expect 4 or more grazings under ideal conditions.

  • Low.

  • None of significance.

  • None of significance.

  • 2 to 8 kilograms per hectare under dryland conditions, 10 to 20 kilograms per hectare under irrigation, Sowing/planting rates in mixtures. 2 to 4 kilograms per hectare under dryland conditions in favourable environments.

Animal Production
  • Highly palatable and digestible prior to flowering in grazing situation. The sweet sorghum hybrids keep a higher free sugar content in the stem and are more suitable as stand-over feed into winter or the dry season.

  • Low level prussic acid risk, especially in young stressed regrowth during a dry spell. Having supplement blocks containing sulphur available will reduce the risk of prussic acid poisoning. Nitrate poisoning can occur when grown on fertile soils containing high levels of nitrogen and when plants are stressed by dry conditions or frost.

    Enter your full postal address to receive printed versions of our promotional material in the mail