Ryegrass (Lolium) is a type of grass that is used for lawns, pastures, and forage. A cool-season grass, so it grows best in cool climates. Because ryegrass is a fast-growing grass that is tolerant of a variety of soils and conditions, it is often categorized as a grassy weed. While ryegrass is a good choice for lawns because it is low-maintenance and requires less water than other types of grasses, it can also completely take over your lawn, as it outcompetes other turf grasses for nutrients.
Types Of Ryegrass
The two most common types of ryegrass are perennial and annual ryegrass. If you are looking for a long-lived grass tolerant of various conditions, perennial ryegrass is a good choice. If you are looking for a fast-growing grass that is a good choice for temporary cover crops or overseeding, annual ryegrass is a good choice. Below is a chart showing the main differences between these two types of grasses:
Perennial Ryegrass
Lifespan: Several years
Growth Rate: Fast
Drought Tolerance: Good
Heat Tolerance: Fair
Cold Tolerance: Excellent
Disease Resistance: Good
Pest Resistance: Good
Annual Ryegrass
Lifespan: One year
Growth Rate: Faster
Drought Tolerance: Excellent
Heat Tolerance: Good
Cold Tolerance: Fair
Disease Resistance: Fair
Pest Resistance: Fair
Perennial Ryegrass
Perennial ryegrass (Lolium perenne) is a grassy weed that is also considered a cover crop. It is a fast-growing weed that can be difficult to identify because it resembles healthy turfgrass. Perennial ryegrass outcompetes healthy turfgrass for water and nutrients, so it is important to identify and remove it from your lawn as soon as possible.
Here are some features of perennial ryegrass that can help you identify it:
Fine texture and deep green color.
Long, narrow leaves that are rolled inward at the base.
Strong, sweet smell.
Small, purple, or white flowers grow in the spring and summer.
Annual Ryegrass
Annual ryegrass (Lolium multiflorum) is a winter annual grass that is found throughout the United States. It has a fibrous root system and can reach heights of up to 3 feet. Annual ryegrass is a popular turfgrass and is often used for overseeding lawns during cold winter months. Farmers and ranchers also use it as a cover crop to provide food for grazing cattle.
Here are some features of annual ryegrass that can help you identify it:
Bunch-forming grass that grows in clumps.
Leaves are dark green and have ridges on the upper surface, while they are glossy and smooth on the lower surface.
The stems have a red hue at the base.
The leaf blades range between 2.5 to 8 inches in length and up to 0.25 inches in width.
The seed head is a long spike that is between 4 to 16 inches long, with spikelets arranged alternately up the stem.
Life Cycle Of Ryegrass
The life cycle of ryegrass is as follows:
Germination: Ryegrass seeds germinate when the soil temperature reaches 50 degrees Fahrenheit. The seeds need sunlight to germinate, so they will not germinate in shady areas.
Growth: Ryegrass plants grow quickly and can reach a height of 2 feet. They have long, narrow leaves and a deep green color.
Flowering: Ryegrass plants flower in the spring and summer. The flowers are small and white.
Seed Production: Ryegrass plants produce seeds that are about 1/8 inch long. The seeds are dark brown in color and have a pointed tip.
Seed Dispersal: Ryegrass seeds are dispersed by wind, water, and animals. The seeds can remain dormant in the soil for several years before germinating.
Prevention & Treatment
If ryegrass has invaded your lawn, taking care of it immediately is crucial, as this fast-growing grass spreads quickly. The best treatment for ryegrass that invaded your lawn is prevention.
