Cool-season grass
Perennial Ryegrass
Perennial ryegrass is the sprinter of the cool-season grasses. It germinates fast, greens up quickly, and takes wear well, which makes it handy for two jobs in particular. One is patching or getting quick cover on a new seeding, often blended with tall fescue. The other is overseeding a dormant bermuda lawn for green color through the winter. As a stand-alone permanent lawn here it is a weaker choice, since it does not love our summer heat over the long haul.
At a glance
- Season
- Cool season
- Also called
- perennial rye
How to spot it
Fine to medium blade with a distinctive glossy shine on the back of the leaf, and a fairly upright growth. It grows in bunches rather than spreading.
Looking after perennial ryegrass
What this grass wants through the year.
- Mowing
- Similar to tall fescue, in the two and a half to three and a half inch range for a lawn use.
- Watering
- Moderate. It establishes fast but does not have the deep drought toughness of the warm-season grasses.
- Feeding
- Cool-season timing, so fall for a permanent stand. For a winter overseed on bermuda, a light feeding keeps it green through the cold months.
- Weeds & pests
- Its quick germination helps it out-race weeds during establishment. Long-term, summer heat and disease are its limits here more than any single pest.
- Planting & establishing
- Fall for a lawn, or early fall over dormant bermuda when you want winter color. It comes up faster than almost anything else you can seed.
Good for
Quick cover, patching, blends with tall fescue, and winter overseeding on warm-season lawns.
Watch out for
The long haul. As a permanent solo lawn in our climate it fades under summer heat, so it works best in a supporting role rather than as the whole yard.
Working on your lawn
Knowing the grass is half of it
You know what you have now. The calculators work out how much seed, feed or sod Perennial Ryegrass takes, and the calendar says whether this is even the month to be buying it.
Common questions
- Should I overseed my bermuda lawn with ryegrass for winter?
- You can, and perennial ryegrass is the common pick because it germinates fast and holds green color through the cold months while bermuda is dormant and tan. It is extra work and it needs mowing through the winter, so it is a want-a-green-lawn choice rather than a must-do.
Care guidance reflects general practice for the Carolinas. Your soil, sun, and site vary, so a soil test and your local extension office are the last word on your own lawn.