Which grass is your lawn? It changes everything else
By the Mowie crew · 31 Aug 2026 · 6 min read
Almost every lawn question - how short to mow, when to feed, why it's brown in July, which weed killer won't nuke the lawn - has the same first step: which grass is it? Australian lawns are mostly four families, and in Melbourne's north the honest answer is often "whatever the developer laid, plus the kikuyu that moved in from next door". Ten minutes of identification saves years of caring for the wrong grass.
The big four
| Grass | Spot it by | Loves / hates | Winter |
|---|---|---|---|
| Kikuyu | Bright apple-green, soft flat leaves on thick runners that will climb into your garden beds, your pots, and given time, your car | Loves sun, traffic, neglect and children. Hates shade. Grows faster than anything else in the country | Browns off with frost, first to bounce back |
| Couch | Fine, dense, dark green blades; spreads by runners above and below ground; the "bowling green" look when mown low | Loves full sun and low mowing. Hates shade badly - thins to nothing under trees | Straw-coloured through a Melbourne winter, reliably returns late October |
| Buffalo (Sir Walter and friends) | Broad, flat, thick leaves on chunky surface runners; feels cushioned underfoot | The shade specialist - happy with half the sun the others need. Hates hard scarifying and some cheap herbicides (check every label for "buffalo safe") | Holds colour better than couch or kikuyu; goes purplish-bronze in hard frost |
| Tall fescue | Clumps rather than runs; coarse upright blades; the lawn that's green in July when the whole street is brown | Loves Melbourne winters and spring. Hates February - needs summer watering to survive it. No runners means damage doesn't self-repair | Green and growing - winter is its season |
What it changes
- Mowing height. Couch tolerates low, tight mowing and rewards it. Buffalo and fescue want to be kept tall - scalp a buffalo lawn and you've exposed its runners to the sun; scalp fescue and it has no runners to recover from at all. Kikuyu doesn't care, because kikuyu has never cared about anything.
- Winter expectations. A brown couch lawn in July is asleep, not dead (the tug test proves it); a brown fescue lawn in July is in real trouble. Same symptom, opposite meaning.
- Repairs. Runner grasses walk back over bare patches by themselves; fescue must be reseeded. That box of "lawn repair" seed is rye and fescue, which is why it never matches your couch. Details in the patchy lawn guide.
- Chemicals. Several common broadleaf herbicides that are fine on couch and kikuyu will scorch or kill buffalo. This mistake is annoyingly permanent.
- Renovation. Couch and kikuyu take a hard scarify and come back thicker; buffalo takes a light rake only.
The Melbourne's-north mix
Newer estates around Mill Park, South Morang, Mernda and Doreen mostly laid buffalo (front, for looks and shade tolerance) or couch. Older blocks are couch that has been steadily annexed by kikuyu - it invades from lawn to lawn along fence lines and wins on pure aggression. A mixed kikuyu-couch lawn is completely normal here and nothing to fix: care for it as kikuyu, mow it regularly at medium height, and it makes a tough, green, self-repairing family lawn that shrugs off dogs, cricket and forgetting about it for a month. Whatever's growing, the care calendar for it is in the winter and spring guides.