Autumn lawn care is often overlooked, but Autumn is one of the most important seasons for lawn care in Australia. What you do during March, April and May directly affects how your lawn survives winter and how well it recovers in spring.
Autumn is the best time to strengthen roots, control weeds, repair damage from summer, and prepare your lawn for colder weather. This guide walks you through exactly what to do — and what not to do — to keep your lawn healthy through the cooler months.
Why Autumn Lawn Care Matters in Australia
Unlike spring, autumn lawn care is about preparation, not growth at all costs.
During autumn:
- Soil temperatures are still warm
- Grass growth begins to slow
- Root development increases
- Weeds and pests are easier to control
Done correctly, autumn care:
- Improves winter survival
- Reduces weed pressure in spring
- Builds stronger root systems
- Prevents common cold‑weather lawn problems
Step‑by‑Step Autumn Lawn Care Guide
1. Fertilise Your Lawn in Early to Mid‑Autumn
Autumn fertilising is the most important lawn task of the season.
Use a fertiliser that:
- Is slow‑release
- Has lower nitrogen
- Contains higher potassium for root strength
This helps your lawn:
- Develop deeper roots
- Improve cold tolerance
- Store energy for spring green‑up
Learn more about autumn fertilising
2. Adjust Your Mowing Height
As growth slows, mowing habits need to change.
Autumn mowing tips:
- Mow less frequently
- Raise mower height slightly
- Never scalp the lawn
Recommended heights:
- Buffalo: 40–50mm
- Kikuyu / Couch: 25–30mm
- Zoysia: 30–40mm
Taller grass provides insulation, increases light absorption and reduces weed invasion.
Learn more about how this differs for other grass types
3. Control Weeds Before Winter
Autumn is one of the best times to treat weeds in Australian lawns.
Why?
- Weeds are still actively growing
- Less competition from fast grass growth
- Treatments are more effective
Focus on:
- Broadleaf weeds
- Clover
- Bindii
- Winter grass seedlings
Early control now means fewer weeds in spring.
4. Repair Bare or Damaged Areas
Autumn is the last safe renovation window before winter.
You can:
- Lightly topdress uneven areas
- Repair summer damage
- Encourage lateral growth
- Sow new cool season grass seed
Avoid heavy renovations in late autumn when growth slows significantly.
5. Reduce Watering Frequency
As temperatures drop, lawns need less water.
Autumn watering tips:
- Water deeply but less often
- Only water in the morning
- Adjust irrigation timers
Overwatering in autumn can lead to fungal problems.
6. Watch for Lawn Grubs and Fungus
Autumn can still bring pests and disease.
Look out for:
- Birds pecking at turf (grubs)
- Spongy grass underfoot
- Discoloured patches or leaf spotting
Early treatment prevents long‑term damage.
Learn more about common autumn lawn problems
What NOT to Do to Your Lawn in Autumn
Avoid these common mistakes:
- Over‑fertilising with high nitrogen
- Scalping before winter
- Heavy dethatching late in the season
- Overwatering during cooler weather
Learn more about common autumn mistakes
Your Autumn Lawn Care Checklist (Quick Summary)
✅ Apply a suitable autumn fertiliser
✅ Raise mowing height
✅ Treat weeds early
✅ Aerate compacted areas
✅ Repair minor damage
✅ Reduce watering
✅ Monitor for pests and disease