The four warm-season grasses side by side
The sun and wear ratings come from the Turf Growers Association of Western Australia and Water Corporation, the WA water utility. The seed and price columns come from GardenMaths' own turf vs seed research.
| Grass | Direct sun needed | Wear and recovery | Upkeep | From seed? | Turf per m² |
|---|---|---|---|---|---|
| Soft-leaf buffalo | At least 4 hours | Moderate to good | Low | No, turf or runners only | $12–16 |
| Couch | 4–5 hours or more | Excellent | Moderate to high | Yes, about 10 g/m² | $7–12 |
| Kikuyu | 5–6 hours | Excellent | High: mow often | Yes, about 5–10 g/m² | $7–12 |
| Zoysia | 5–6 hours | Moderate to good | Low: needs less mowing | Some varieties | $14–20 |
The same grasses grow in the United States under other names. Soft-leaf buffalo is St. Augustinegrass, couch is bermudagrass, and kikuyu and zoysia keep their names. That opens up decades of university research. The University of Florida's turfgrass guide rates St. Augustinegrass and zoysia good to excellent for shade and bermudagrass poor. It rates bermudagrass excellent for wear, zoysia good to excellent, and St. Augustinegrass only poor to fair. WA growers rate Australian soft-leaf buffalo varieties higher than that. Still, for the heaviest wear, couch and kikuyu are the safer choice.
Sun and shade
No lawn grass grows in full shade. Every warm-season grass needs several hours of direct sun a day, and the shaded side of a house or the ground under a dense tree is often below that. The WA growers' minimums are about 4 hours for soft-leaf buffalo, 5 for couch, and 5–6 for kikuyu and zoysia. Water Corporation gives couch 4–5 hours. Where the sun falls short, the University of Florida suggests an ornamental groundcover rather than a struggling lawn. Our plant spacing calculator works out how many plants a groundcover area needs.
In cooler climates, tall fescue is the shade option. The New Zealand seed company Newton Seed says it does well in both sun and partial shade.
Runners: which grasses invade the beds
How a grass spreads decides how much edging and trimming it needs:
- Couch spreads by stolons on the surface and rhizomes, stems that run underground. That makes it quick to repair and hard to keep out of garden beds.
- Kikuyu spreads by thick stems that root at every node, above and below ground. University of California IPM, where kikuyu is a weed, describes it invading flower beds and groundcovers and choking them out. It also grows on at lower temperatures than couch.
- Soft-leaf buffalo spreads by stolons only, with no rhizomes. That is why it cannot be grown from seed, and why it is the easiest of the three to keep in its place.
- Zoysia spreads by both, but grows slowly.
A continuous edge between lawn and beds saves hours of trimming. The garden edging calculator counts the lengths and stakes, and a flush mowing strip helps most with couch and kikuyu.
Water, heat and frost
Water Corporation recommends all four, plus Queensland blue couch, for Perth gardens and describes them all as drought-tolerant, so choose on sun and wear first. The watering calculator turns your sprinklers into run times. For frost, Water Corporation lists buffalo and couch as frost-tolerant and zoysia and Queensland blue as not. All warm-season grasses slow down and lose colour in a cold winter and green up again in spring.
New Zealand and cool southern lawns
Most New Zealand lawns, and many in the cooler south of Australia, are cool-season grasses. They grow in spring and autumn, stay green through winter and are sown from seed:
- Perennial ryegrass: quick to establish and hard-wearing. Newton Seed calls its ryegrass blend suitable for all New Zealand climates.
- Tall fescue: deep-rooted and drought-resistant, with good wear and some shade tolerance.
- Kikuyu: takes over in warm, coastal parts of the North Island. Newton Seed recommends it for coastal regions and warmer climates, where it thrives on little water.
Cool-season grasses are sown thickly, at about 30–50 g/m² for ryegrass and tall fescue, against 5–10 g/m² for the warm-season seeds. The grass seed calculator has every rate and sowing season.
Choosing in practice
- Count the hours of sun on the shadiest part of the lawn in winter, when the sun is lowest. That rules grasses out before anything else does.
- Decide how it will be used. Daily running and dogs point to couch or kikuyu. A quieter lawn around beds suits buffalo or zoysia.
- Decide how much mowing and edging you will do. Kikuyu is the most work, zoysia the least.
- Choose turf or seed. Buffalo means turf. The turf calculator gives the rolls, underlay and first-fortnight water. The turf vs seed guide compares the cost of each route.
Once it is down, feed it at the right time for its type. When to fertilise your lawn has the calendar for warm- and cool-season grasses.
Questions
Which lawn grass is best for shade in Australia?
Soft-leaf buffalo, which needs about 4 hours of direct sun a day, the least of the main warm-season grasses. Zoysia and couch need 4–6 hours and kikuyu 5–6. In cool climates, tall fescue copes with partial shade. Where there is less sun than that, a groundcover does better than any lawn.
Is kikuyu or buffalo better?
It depends on the yard. Kikuyu is cheaper, grows from seed, and has excellent wear and recovery, but needs 5–6 hours of sun, frequent mowing and a firm edge to keep it out of the beds. Soft-leaf buffalo costs more and comes only as turf, but copes with less sun, needs less upkeep and does not spread by underground stems.
Which grass is best for kids and dogs?
Couch or kikuyu in a sunny yard. WA turf growers rate both excellent for wear and recovery, and the University of Florida rates bermudagrass (couch) excellent for wear. Both need full sun to keep up with heavy use.
Can buffalo grass be grown from seed?
No. Soft-leaf buffalo (St. Augustinegrass) spreads only by surface runners and is established as turf, runners or plugs. Couch, kikuyu and some zoysias can be sown from seed.
Sources
- Turf Growers Association of Western Australia, Turf varieties – minimum sun hours, wear and maintenance for buffalo, couch, kikuyu, zoysia and Queensland blue.
- Water Corporation, Establishing a new lawn – recommended grasses, sun hours, drought and frost tolerance, maintenance.
- University of Florida IFAS, Selecting a turfgrass for Florida lawns – shade, wear and drought ratings and establishment methods; St. Augustinegrass for Florida lawns – growth by stolons.
- University of California IPM, Kikuyugrass – spread, invasion of beds, growth at lower temperatures.
- Newton Seed (Village Green Seed), A guide to lawn seeds in New Zealand – ryegrass, tall fescue and kikuyu in New Zealand.
- Seed rates and turf prices: the GardenMaths grass seed calculator and turf calculator, with their sources.
Last reviewed 24 September 2026 · Report an error