About
Lolium multiflorum 'Nabucco'PBR is a cultivar of Italian ryegrass (genus Lolium) in the grass family Poaceae. Members of this species can behave as annuals, biennials or perennials depending on local conditions and flower from May to July. The species is grown for silage, as a cover crop and sometimes as an ornamental, but it readily naturalises and can become a weed in arable or native habitats. Identification relies on features such as a long bristle on the spikelet and a round stem.
About the genus
Lolium is a genus of tufted grasses in the bluegrass subfamily (Pooideae). It is often called ryegrass, but this term is sometimes used to refer to grasses in other genera.
Wikipedia contributors, "Lolium", CC BY-SA 4.0 — Lolium
In the garden
Lolium multiflorum 'Nabucco'PBR belongs to the Italian ryegrass group and traces its use to temperate Europe, where the species is widely cultivated for agricultural and practical purposes. Plants may complete their lifecycle in one year or persist longer depending on climate and management, and flowering occurs between May and July. The species has a history of naturalising outside cultivation and can be invasive in unmanaged ground. Where it is grown, expect it to be handled as a productive, seasonal grass rather than a long-term turf perennial. It is commonly employed for silage and as a cover crop, and is also used in ornamental mixes where a quick-establishing grass is required. Note that wild populations of L. multiflorum have shown resistance to multiple herbicide groups, and the species can host cereal viruses; plan management accordingly if it is near arable crops. In a garden or landscape context use 'Nabucco'PBR in contained or managed blocks rather than wild margins to limit spread. When sourcing seed or checking plants, look for the characteristic long bristle on the spikelet and the round (not folded) stem to distinguish it from other ryegrasses and from couch grass.
