There are no standardized maturity groups for hybrid ryegrass. Varieties are classified by growth type and vegetative rate, which determine the timing of growth stages, the intensity of spring regrowth, and aftermath production.
In the reference
36
varieties
crop Hybrid ryegrass,
where this is mentioned in the description.
Classification of hybrid ryegrass varieties is based on biotypes: multi-cut, pasture, and intermediate. The multi-cut type is characterized by an erect plant habit and intensive spring growth, whereas the pasture type forms a dense sward and develops more slowly, which determines the timing of stem elongation and heading phases.
In breeding and production, plant development dynamics are evaluated instead of formal maturity groups. These indicators allow agronomists to select varieties with varying vegetative rates to create a forage production sequence, ensuring optimal harvest timing and preventing stem lignification, which reduces forage quality.
General information about the subject — on the page
Maturity group.
Varieties of Hybrid ryegrass mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.