Late perennial ryegrass - diploid

  • Late diploid perennial ryegrass which was bred in Northern Ireland by AFBI and first officially listed in 2018
  • High spring growth, comparable with many much earlier varieties, meaning yield is not sacrificed for quality with this later heading variety
  • Callan performs very well under both cutting and grazing management schemes although it’s performance is best suited to grazing

Species: Lolium Perenne

Officially listed in: England and Wales, Scotland and Republic of Ireland

Heading dates: England & Wales 2nd June; Scotland REE 46; R.O.I. 3rd June

Ploidy: Diploid

Bred in: Northern Ireland

Most suited to: Any medium - long term grazing and / or cutting ley where spring growth is vital



Across the multiple geographical location, and throughout the year, Callan provides high quality forage from both silage and grazing management. Grazing D values are particularly good and the high early spring growth displayed by Callan requires cutting at the correct growth stage to ensure quality is maximised.


Other Attributes

Callan has excellent Mildew resistance (7.9) and a reasonable Crown Rust resistance of 5.8. It has excellent winter hardines.


Being a diploid, you should expect an average of 600,000 seeds per kilogram and a slightly more prostrate growth habit. Callan therefore brings ground cover and a higher plant population than tetraploid counterparts to mixtures.


Before recommendation, Callan has been extensively trialled across almost 20 location in the British Isles to gather data on its performance in multiple climatic conditions.


Callan was bred in Northern Ireland at the Agri-Food and Biosciences Institute (AFBI) by the now retired grass breeder David Johnston. The variety was named after a northerly flowing river near the city of Armagh.



DESCRIPTION: Dark green, densely or loosely tufted. Folded shoot and leaves.

FLOWERING HEAD: Flattened spike with the spikelets arranged alternately on opposite sides of the stem. The spikelets are stalkless with the narrow, rounded face fitting against the stem.

LEAF BLADE: Ribbed on upper surface, smooth and shiny underside. Red at base of stem.

AURICLES & LIGULE: Auricles are usually well developed, up to 1/12 of an inch (2 mm) long, or are sometimes lacking.



Late perennial ryegrass