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24Seven Diploid Perennial Ryegrass


Lolium perenne

Dairy, beef and sheep. Long-term feed production. Temperate, high rainfall zones.

A diploid perennial ryegrass bred for high production and tiller density. It's very late heading date maximises seasonal production and feed quality

  • High tiller density and persistence
  • Very late heading date
  • Excellent growth rates
  • Increased feed production throughout the year
  • High stock performance
  • Good resilience to hard grazing and dry periods
  • Heading date +24 days
Seed Agronomy Table
Heading Date + 24 days
Maturity Late
Life Span 5 - 7 years
Seeding Rate - Dryland (kg/ha) 10 - 15
Seeding Rate - High Rainfall/Irrigation (kg/ha) 25 - 30
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

  • Edge

  • Happe

Enterprises for this seed

  • Easily established
  • Highly productive and nutritious under grazing
  • Moderate winter and summer growth
  • Rapid regrowth


  • Requires moderate to high soil fertility
  • Does not withstand heavy grazing pressure through drought
  • Susceptible to cockchafer and cricket damage
  • Standard endophyte can cause stock health issues

Plant Description
  • Densely tufted, multi-tillered perennial with fibrous root system.

  • 30 to 90 centimetres.

  • Fine (approximately equal to 7 millimetres), dark green, hairless, under surface shiny, blade folded about mid-rib in young shoot, leaf-base usually dark red.

  • Spike approximately equal to 20 centimetres, spikelet usually greater than 10 florets/spikelet; awnless lemma.

  • Fawn, flat, awnless, approximately equal to 6 millimetres long. Approximately equal to 520,000 per kilogram (diploid cvv).

Pasture Type and Use

Grazing and fodder conservation. Most widely sown pasture grass in temperate regions.


Greater than 550 millimetres+.


Medium-heavy, moderate-high fertility (eg. Olsen P less than 12, 0 to 10 centimetres). Tolerates slight salinity.


Cold and frost tolerant, growth constrained by high temperature.

  • Perennial ryegrass.

  • White clover, medics and sub clover.

  • 5 to 10 kilograms per hectare.

  • 10 to 25 kilograms per hectare.

  • Autumn and Spring.

  • P and possibly N at sowing.

  • Requires fertile soil to persist. Approximately equal to 10 kilograms P per hectare. Monitor S, K, Cu especially. Supply N by clover/fertiliser. Maintain Colwell P approximately equal to 30 (WA), Olsen P greater than 12.

  • Tolerates close, continuous grazing except if drought stressed. Graze at 2.5 to 3 leaf stage to optimise yield under rotational grazing. Well suited to hay/ silage.

  • Will spread if allowed to seed.

  • Widely naturalised on fertile soils in temperate Australia.

  • Red and black-headed cockchafer, black field cricket, white-fringed weevil, African black beetle, corbies, underground grass caterpillar.

  • Crown rust, stem rust, barley yellow dwarf virus, ryegrass mosaic virus.

  • In considering selective herbicides consider the stage of growth of the ryegrass and what non-target companion species are present.

Animal Production
  • High nutritive value.

  • Palatable.

  • High yields; highly responsive to fertiliser and irrigation.

  • Cultivars with wild endophyte can cause perennial ryegrass toxicosis and ill-thrift. Bacterial infection of seedhead can occasionally occur and result in ergot poisoning.

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