If you’ve ever stood over a browning lawn in February wondering whether you’re allowed to turn the sprinklers on, you’re not alone. Perth’s watering rules are simple once you know them — and working with them, rather than around them, is genuinely the best thing you can do for your lawn. Here’s the full picture from a team that mows Perth lawns every day.
Your two watering days
Perth gardens on scheme water get two rostered sprinkler days a week, set by the last digit of your house or lot number. Live at number 17? The 7 sets your days. Sprinklers can only run before 9am or after 6pm on your days — early morning is far better, because evening watering leaves lawns damp overnight and invites fungal disease. (Check your exact days on the Water Corporation’s watering days page.)
Got a garden bore? The same two-day roster applies to bore-fed sprinklers too — bore water isn’t a loophole, and the fines are the same.
The winter sprinkler ban: 1 June to 31 August
Every winter, all sprinkler use is banned from 1 June to 31 August — scheme and bore alike. It sounds harsh, but Perth lawns barely grow through winter and the rain does the work. Hand-watering with a trigger hose is still allowed if you have a struggling pot or new seedling. Breach the ban and you’re up for a $100 on-the-spot fine — inspectors do patrol.
Just laid new turf? There’s an exemption you can apply for: up to 42 days of daily watering for turf laid October–March, or 35 days April–September (outside the ban).
How to keep a lawn green on two days a week
Two days is plenty — if the water actually gets to the roots. This is what we do on the lawns we look after across Perth’s northern suburbs:
Water deeply, not often. One good soak per rostered day beats two light sprinkles. Aim for roughly 10mm per station — a tuna tin on the lawn is the classic Perth test.
Fix water-repellent sand. Most of our coastal suburbs — Karrinyup, North Beach, Scarborough, Mullaloo — sit on sand that turns hydrophobic in summer: water beads and runs off instead of soaking in. A soil wetting agent every spring and mid-summer makes your two days actually count.
Mow higher in the heat. A slightly longer leaf shades the roots and dramatically cuts evaporation. It’s the cheapest water-saving trick there is — we raise cutting heights on every lawn we mow from December to February.
Mulch your beds. A 50–75mm layer of coarse mulch keeps soil moisture where it belongs and cuts weeds at the same time. (We deliver and spread it — see our garden mulching service.)
Feed lightly, regularly. Small feeds in spring and autumn build a dense lawn that handles summer stress far better than a starved one.
What about waterwise and native verges?
More Perth councils are encouraging waterwise native verges, and they suit our sandy soils brilliantly — once established, many need no scheme water at all. If you’ve already got one, seasonal weeding, trimming and a fresh layer of mulch keeps it looking deliberate rather than neglected. We maintain native and waterwise verges across our service area.
Let us handle it
The rules aren’t complicated — but staying on top of mowing heights, wetting agents, mulch and feeding through a Perth summer is exactly the sort of thing that eats a weekend. That’s our job. Top Cut Gardening Care mows and maintains gardens across Perth’s northern suburbs — rated 5.0 from 13 Google reviews — from Karrinyup and North Beach to Warwick, Carine, Scarborough, Hillarys and Wembley.
Want your weekends back? Call 0422 337 609 for a free quote, or read more about our lawn mowing service.
