Rye Grass

Common Name

Rye Grass, Ryegrass, Perennial Ryegrass

Scientific Name





Perennial. Winter growing. Dormant in Summer. Seeds germinate in 7-10 days in moist soil. Ryegrass requires 60 days of growth before hard-killing frost.

Seasons of Growth

Perennial ryegrass is a winter to spring growing weed that can emerge from late autumn through to early spring.

Key Distinguishing Feature

Ryegrass is a bunching grass type, which means it emerges in clumps and spreads by secondary shoots or tillers. Other features include its bright, shiny green colour, dense growth patterns and coarse texture.

Perennial ryegrass is widely used throughout the Australia to either utilise year-round, or oversew their warm-season grasses, but the way it's used differs from region to region. This fine-bladed grass has an exceptionally fast germination rate at 7-10 days with appropriate growing conditions. Depending on where you live and your immediate lawn goals, perennial ryegrass may offer just what you need.

Although often thought as a unique grass through Australia’s cooler seasons, Ryegrass can germinate from seeds as an unwanted weed.

Key Products for Control:

Tribute - 15mL/100sqm *Not safe for QLD Blue Couch and Kikuyu lawns

Duke 100WG - 1.5g/100sqm (Suppression Only) *Not safe for QLD Blue Couch, Fescue, Bentgrass, or Ryegrass lawns

For 6-months weed germination prevention, we recommend Pre-Emergent Herbicides, such as; Spartan, Barricade, or Onset