Perennial Ryegrass: Fast Green-Up, Smart Uses, and Where It Falls Short
Perennial ryegrass seed is your shortcut to a green lawn,if you use it right. Here’s how to seed, blend, and care for it, plus where it works and where it fizzles.
7 min read
Grass Types
Match the grass to your climate and how you use the yard. The wrong species causes most chronic lawn problems.
2 guides
Start with the numbers
Work out quantities and costs before you read further.
Grass Seed Calculator
Seeding rates differ by species by a factor of twenty, bermudagrass wants 1 lb per 1,000 sq ft, perennial ryegrass wants 8. Pick your grass and whether you're starting fresh or overseeding.
OpenSod Calculator
Enter your lawn area to get square feet, individual pieces, and pallets, plus the cut allowance you'll actually need. Sod is perishable, so ordering short means a second delivery fee.
OpenLawn Calculator
Rather than running four calculators separately, enter your lawn size and grass type once and get the full picture, seed, nitrogen for the year, water per week, and what the whole thing costs to maintain.
OpenCompare turfgrass species
Seeding rates, mowing heights, and tolerances side by side. Ratings run 1 (poor) to 5 (excellent).
Cool-season grasses
| Grass | Seed rate (new) | Mow height | Shade | Drought | Traffic |
|---|---|---|---|---|---|
| Kentucky bluegrass | 2–3 lb/1k | 2.5–3.5 in | 2/5 | 2/5 | 4/5 |
| Tall fescue | 6–8 lb/1k | 3–4 in | 3/5 | 4/5 | 4/5 |
| Perennial ryegrass | 6–9 lb/1k | 1.5–2.5 in | 2/5 | 2/5 | 5/5 |
| Fine fescue | 4–5 lb/1k | 2.5–4 in | 5/5 | 4/5 | 2/5 |
Warm-season grasses
| Grass | Seed rate (new) | Mow height | Shade | Drought | Traffic |
|---|---|---|---|---|---|
| Bermudagrass | 1–2 lb/1k | 1–2 in | 1/5 | 5/5 | 5/5 |
| Zoysiagrass | 1–2 lb/1k | 1–2.5 in | 3/5 | 4/5 | 4/5 |
| Centipedegrass | 0.25–0.5 lb/1k | 1–2 in | 3/5 | 3/5 | 2/5 |
| St. Augustinegrass | Not seeded | 2.5–4 in | 4/5 | 3/5 | 2/5 |
| Bahiagrass | 6–10 lb/1k | 2.5–4 in | 2/5 | 5/5 | 3/5 |
| Buffalograss | 2–4 lb/1k | 2–4 in | 1/5 | 5/5 | 3/5 |
Rates are for new lawns from bare soil. Overseeding uses roughly half. Work out your exact quantity.
Grass Types guides
Zoysiagrass: What to Know Before You Plant (and How to Keep It Happy)
Zoysiagrass makes a thick, weed-fighting lawn but takes patience and goes brown for months. Here’s how to plant, care for, and decide if zoysia fits your yard.
7 min read