Variety traits
Bromus catharticus Vahl
The winter hardiness of rescue grass determines its life form—perennial in mild climates or annual in severe ones—and the timing of spring regrowth.
In the reference 3 varieties crop Rescue grass, where this is mentioned in the description.
The crop is traditionally adapted to USDA hardiness zones 6–9; however, modern breeding achievements allow some varieties, such as 'Persister', to extend survival limits to zone 5. The plant's ability to overwinter directly influences its productive longevity and strategy for use in crop rotation.
In regions with mild climates, the plant maintains active growth during the winter period, whereas under severe winter conditions, the species often loses its perennial properties, transitioning into a winter annual. In the latter case, productivity for the following season depends entirely on successful self-seeding and the formation of a seed bank.
Winter hardiness also determines the speed of vegetation onset, which begins when soil temperatures reach 4–7°C. Low cold tolerance in northern regions leads to thinning of the stand, making the crop economically inefficient as a long-term pasture resource.
General information about the subject — on the page Winter hardiness.
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.
Bromus catharticus Vahl · Rescue grass
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Bromus catharticus Vahl · Rescue grass
SISFORAGGERA (IT)
Bromus catharticus Vahl · Rescue grass
RAGT SA (FR)
Bromus catharticus Vahl · Rescue grass
Poznanska Hodowla Roslin Sp. z o.o