If your lawn has spent the last few months looking more brown patch than green carpet, you're in good company. Winter is tough on lawns — shorter days, less sunlight, cold snaps, and heavy foot traffic on soft, waterlogged ground all take their toll. By the time the weather starts warming up, a lot of lawns across Australia and New Zealand are looking thin, patchy, and a bit sorry for themselves.
The good news? Lawns are remarkably resilient. With the right care as the weather warms, most patchy winter lawns can bounce back to a thick, healthy green in just a few weeks. You don't need to be a turf expert — just follow a few key steps in the right order.
Why Does Your Lawn Look So Patchy?
Before you dive in, it helps to know what you're dealing with. Common culprits include:
- Lack of sunlight over winter, especially in shaded areas
- Compacted soil from foot traffic on wet ground
- Waterlogging in poorly draining spots
- Fungal disease, which thrives in cool, damp conditions
- Weeds moving in on thin, weakened patches
- Thatch build-up — a spongy layer of dead grass and roots that blocks water and nutrients from reaching the soil
Step 1: Give It a Good Clean-Up
Start by raking out dead grass, leaves, and any debris that built up over winter. This lets light and air reach the soil surface and gives you a clear view of just how patchy things really are.
Step 2: Aerate Compacted Soil
If your lawn has been walked on a lot while wet, the soil underneath is likely compacted, making it hard for roots, air, and water to move through it.
- Use a garden fork or a hollow-tine aerator to spike holes across the lawn, especially in high-traffic areas
- Aim for holes roughly 10cm apart and 5–10cm deep
- This step alone can make a big difference to how well everything else works
Step 3: Top Dress and Level Uneven Patches
Spreading a thin layer of quality top dressing mix (a blend of soil, sand, and organic matter) helps level out low spots, improves soil structure, and gives grass seed something ideal to germinate in.
- Spread a layer around 1cm thick evenly across the lawn
- Work it gently into the surface with the back of a rake
Step 4: Oversow Bare and Thin Patches
This is where the real magic happens.
- Choose a grass seed variety suited to your climate and existing lawn type — your local Gro garden centre can help match the right blend
- Scatter seed generously over bare or thinning patches, then lightly rake it in so it makes good contact with the soil
- Keep the area consistently moist (not soaked) until germination, which usually takes 1–3 weeks depending on variety and weather
Step 5: Feed It Properly
A hungry lawn struggles to recover. Once new growth appears:
- Apply a lawn starter fertiliser for newly seeded areas, which is lower in nitrogen and won't burn tender new growth
- For established areas, use a general lawn fertiliser high in nitrogen to boost colour and encourage strong, even growth
- Always water in fertiliser well after applying
Step 6: Water Wisely
- Water deeply but less often, rather than little and often — this encourages roots to grow deeper and makes your lawn more resilient
- Early morning is the best time to water, giving grass time to dry out before evening and reducing the risk of fungal disease
- Newly seeded patches need more frequent, gentle watering until established
Step 7: Mow Mindfully
Resist the urge to mow too low or too soon.
- Wait until new grass reaches about 8–10cm before its first mow
- Keep mower blades sharp — a clean cut heals faster than a ragged, torn one
- Never remove more than a third of the blade length in a single mow
Common Mistakes to Avoid
- Mowing too short, which stresses grass and encourages weeds
- Watering little and often, leading to shallow, weak roots
- Skipping aeration and going straight to seed on compacted soil
- Walking on newly seeded areas before they've established
- Fertilising too heavily, which can scorch new growth
Ready for a Lush Lawn Again?
A patchy winter lawn isn't a lost cause — it's just waiting for the right combination of aeration, feeding, seeding, and a bit of patience. Stick with these steps over the coming weeks and you'll be back to a thick, healthy lawn before you know it.
Pop into your local Gro garden centre for expert advice on the right grass seed, fertiliser, and lawn care tools for your specific lawn type and region — see you in store!