Our Products

Synergy Seeds supply a combination of high-grade temperate legumes, grasses, cereals, tropical and vetch varieties. We supply both proprietary and public varieties, so that our customers can meet the demands of their markets.


Sub Clover
Subterranean/Sub clover (ssp. yanninicum)

Riverina is mid season (119 days to flower) variety, it belongs to the water logging tolerant “white-seeded” subspecies yanninicum of sub clover, and is derived from the same cross as Gosse, (Meteora/Trikkala) and was bred by Dr J S Gladstones from the University of WA.

Riverina can be sown across a wide range of soil types in the 450mm plus rainfall zones with a pH of 4.5 and above.

The variety Riverina has some distinct advantages over Gosse and Trikkala.

• Comparative flowering dates at Perth are: Riverina 119 days, Trikkala 112 days, Gosse 126 days.
• Lower levels of the oestrogenic isoflavone, (formononetin), than Trikkala.
• Riverina is more resistant to powdery mildew than Gosse.

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Growing Conditions

  • Soil Type

    Riverina prefers sandy loams to clays of moderate acidity and good water holding capacity. Highly tolerant of winter waterloggin.

  • Sowing Rate

    Pure 5 - 10kg/ha Dryland
    Pure 11 - 15kg/ha Irrigated

  • Rainfall


  • pH

    4.5 - 6.5 (CaCl2)

  • Inoculant

    Group C Rhizobium


  • Early – Mid Season 119 days to flowering
  • Comparative flowering dates at Perth are:
  • Riverina 119 days
  • Trikkala 112 days
  • Gosse 126 days
  • Has increased early mid winter production compared to Gosse
  • Riverina is resistant to Race 1 and at least moderately resistant to Race 2 of clover scorch
  • Higher hard seed content than Trikkala and Gosse
  • Suited to early watering programs
  • Lower levels of the oestrogenic isoflavone, (formononetin), than Trikkala
  • Higher tolerances to leaf rust and leaf spot
  • Riverina has good tolerance to water logging
  • Riverina is more resistant to powdery mildew than Gosse

Get in touch

For any enquiries, our team will be more than happy to assist you.

Please complete this form, and we will respond as soon as possible. You can also email our Adelaide Head Office.