Ryegrass
Information on the benefits and growth habits of ryegrass planted as a cover crop.
Description
Family
- Grass
- Perennial, annual or Italian ryegrass
Growth Habits
Germination
- Annual ryegrass is prone to reseeding
- Perennial ryegrass is slow to establish with lower seedling vigour than annual ryegrass
Top Growth
- Shade tolerant, often used in orchards and vineyards for ground cover
- Annual ryegrass grows 60 to 120 cm.;
- Perennial ryegrass will grow 30 to 90 cm annually for 3-4 years and is competitive and aggressive when established;
- Generally performs poorly in warm temperatures, dry soils and poor fertility
Root System
- Dense, fibrous root system that roots deeply
Site suitability
- Annual ryegrass tolerates more standing water than perennial ryegrass
- Grows best on medium to heavy soils
- High requirements for moisture and nutrients
Control Options
- Tillage and herbicide burndown
Sensitivity to Herbicides: Weed Control
- There are no herbicides registered for weed control in ryegrass. Use good agronomic practices to establish a vigorous crop canopy as quickly as possible.
Benefits and Concerns
Nutrient Management
- Heavy nitrogen feeder when established
- Wide C:N ratio of residue means N will not be released quickly
Pest Management
- Rapid and aggressive growth will suppress weeds
Organic Matter
- Forms a dense sod and lumpy seedbed – can cause some problems with establishment of subsequent crop
Erosion Control
- Used for permaculture areas as erosion control and weed control measure
Soil Moisture
- Tolerant of high soil moisture conditions
Getting Started
Establishment
- Fine firm seedbed needed
Cost & Availability
- Seed readily available
- Perennial more expensive than annual ryegrass
- Cost can be variety dependent; low growing turf hybrids are more expensive
Updated: March 26, 2024
Published: August 24, 2022