Every September, Perth lawns wake up hungry. The winter sprinkler ban ends on 31 August, the soil starts to warm, and the couch, kikuyu and buffalo lawns that sat half-dormant through the wet season suddenly want to grow again. What you do in the next six weeks decides whether you get a thick, green lawn by Christmas — or spend summer trying to rescue a patchy one.
Here’s the spring routine we use across Perth’s northern suburbs, in the order that works.
First, understand why your lawn looks rough right now
A tired-looking September lawn is normal in Perth. Our common lawns — couch, kikuyu, buffalo and zoysia — are warm-season grasses. They slow almost to a stop over winter, so three months of rain, shade and foot traffic leave thin patches they haven’t been able to repair. Meanwhile winter grass (that lime-green, fine-leaf weed that loves June and July) starts dying off as the days warm, leaving bare spots exactly where it smothered your real lawn.
Add Perth’s sandy soil, which turns water-repellent after dry spells, and you get the classic spring complaint: “I’m watering again but it just runs off.” The fix isn’t more water — it’s the right jobs in the right order.
Your September lawn checklist
1. Get your watering right from day one. The roster comes back on 1 September — two rostered days a week, sprinklers only before 9am or after 6pm, and it applies to bores too. Check your watering days, put a fresh battery in the controller (a faulty controller won’t save you from the $100 fine), and run each station once while you watch. Winter is hard on fittings — one blocked or broken sprinkler now means a dead patch by November. Our guide to Perth’s watering days covers the roster in detail.
2. Wet the soil, not just the surface. If water beads or runs off, your sand has gone hydrophobic over winter. Apply a soil wetting agent across the whole lawn and water it in on a rostered day. On Perth sand this one job makes every later job work better — feed and rain actually reach the roots instead of sliding past them.
3. Feed once growth starts, not before. Early-to-mid September is the sweet spot for most Perth lawns, once you can see new growth. Use a slow-release lawn fertiliser at the rate on the bag, and water it in properly. Feeding a lawn that’s still dormant just feeds the weeds.
4. Ease the mower down — don’t scalp. As growth picks up, lower your cutting height gradually over a few mows. As a rule of thumb, never take more than a third of the leaf in one cut. Most Perth couch and kikuyu lawns are happiest around 2.5–5cm in full sun; buffalo in shade wants to stay longer, around 5–7cm. Scalping in September opens the door to weeds right when they’re germinating.
5. Deal with weeds before they seed. Spring is when bindii sets the seed that becomes summer’s prickles — get it out now, roots and all, while plants are small. Rake out dying winter grass rather than letting it collapse into thatch. We do all our weeding by hand, roots and all — no spraying — which suits family lawns and anything near pets.
6. Repair the bare patches. Rake dead material out, loosen the top of the sand, and let the runners do the work — healthy couch and kikuyu will chase across a bare patch quickly once it’s fed and watered. Buffalo doesn’t send runners the same way, so bigger buffalo patches usually need a piece of turf tucked in.
7. If the lawn feels spongy, it’s thatch. A springy, straw-coloured layer under the green means thatch — and a thick layer can stop most of your watering ever reaching the roots. Spring is exactly the season for vertimowing in Perth (it suits couch and kikuyu; buffalo needs a gentler touch). It’s a specialist job with a serious machine — if yours needs it, book it early in the season so the lawn has all of spring and summer to bounce back.
A quick word by grass type
Couch — loves being mown regularly and low-ish; recovers fast from repairs. Kikuyu — the quickest grower in Perth; from October you may be mowing every 7–10 days. Buffalo — keep it a touch longer, especially in shade, and be gentle with dethatching. Zoysia — slower growing; less mowing, but be patient with repairs.
Want the spring lawn without the spring weekends?
This whole routine is what our crews do every September. If the garden’s crossed from “due for a mow” to “where do we start”, a one-off garden clean-up resets it — then regular mowing or a scheduled maintenance visit keeps it sharp through the growing season, with every scrap of green waste gone after every visit. We’re rated 5.0 from 13 Google reviews across Perth’s northern suburbs.
Call 0422 337 609 or get a free quote — and enjoy the lawn instead of working for it.
Spring lawn questions Perth homeowners ask
When should I fertilise my lawn in Perth?
Early-to-mid September for most Perth lawns, once new growth appears, then again in late spring if needed. Always water fertiliser in on one of your rostered watering days.
When does the winter sprinkler ban end in Perth?
31 August. From 1 September the normal roster applies — two rostered days a week, before 9am or after 6pm, including garden bores.
Why is my lawn patchy after winter?
Warm-season grasses barely grow through a Perth winter, so worn areas can’t self-repair — and dying winter grass leaves bare spots as the weather warms. Feed, water correctly, repair patches and mow properly through September and most lawns thicken up by November.
How often should I mow in spring?
Fortnightly is typical early in September, moving to weekly or every 7–10 days for kikuyu and couch as the weather warms. Little and often beats occasional scalping every time.
