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Cover Crops: Ryegrass

Author: Anne Verhallen - Soil Management Specialist (Hort Crops)/OMAFRA; Adam Hayes - Soil Management Specialist (Field Crops)/OMAFRA; Ted Taylor - Technical Coordinater, BMP Program/OMAFRA
Creation Date: June 2001
Last Reviewed: 25 August 2003

Table of Contents

  1. Description: Family
  2. Growth Habits
  3. Control Options
  4. Sensitivity to Herbicides: Weed Control
  5. Benefits and Concerns
  6. Getting Started
  7. Related Links

Description

Family
  • Grass
  • Perennial, annual or Italian ryegrass

Figure 1: Thick growth of ryegrass
Figure 1: Thick growth of ryegrass

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Growth Habit

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.

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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 – which 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

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Related Links

For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca