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.

Agwest Bartolo

Bladder Clover
Trifolium spumosum

AGWEST BARTOLO is the first cultivar of bladder clover (Trifolium spumosum) commercially available to world agriculture.

It can be grown successfully across mildly acid to alkaline sandy-loam and loam soils and is suited to regions with 325-500mm annual rainfall.

Bladder clover is a self-pollinating species and produces small pink flowers. Seeds are contained in a papery pod which is surrounded by a bladder-like, papery calyx; the basis for the common name of bladder clover. One inflorescence may produce up to 150 seeds. Individual seeds are round in shape, approximately 2mg in weight, and range in colour from yellow to orange brown.

Agwest Bartolo is a semi-erect cultivar, flowering approximately 105 days after emergence in Perth. It is adapted to sandy-loam and clay-loams soils of mildly acid to alkaline reaction (pH 5.0-8.0 CaCl2), provided it is reasonably fertile. It is not adapted to saline soils or to long periods of waterlogging.

Bladder clover has an advantage for seed-setting over subterranean clover on hard setting soils, where subterranean clover is unable to bury its burrs. Agwest Bartolo can be sown alone or is an ideal companion plant in mixtures with other legumes such as subterranean clover or yellow and French serradellas.

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Growing Conditions

  • Soil Type

    Very well adapted to mildly acid and alkaline sandy loam and loam soils

  • Sowing Rate

    10 - 14kg/ha
    High Rainfall / Irrigation
    15 - 20kg/ha

  • Rainfall


  • pH

    5.0 - 8.0 (CaCl2)

  • Inoculant

    Group C rhizobium
    (strain WSM 1325)


  • Aerial seeded annual legume
  • Targeted at low to medium rainfall zones
  • Flowering 105 days
  • Good companion with sub clover and other annual legumes
  • Good hard seed levels for continual regeneration

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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.