Autumn Lawncare Tips for Winter Resilience

By Liam Moynihan, QFS

Autumn in North Queensland is an important window for proactive turf management. As the active growth period slows, strategic inputs now can significantly influence winter survival rates and spring recovery. Here’s a guide on what you can do to keep your lawn looking great through the colder months – and of course, if you’d like us to implement any of these suggestions for you, just give us a call on (07) 4426 1991 or make a booking through our website.

Targeted Autumn Fertilisation

Apply a slow-release fertiliser formulated with a higher potassium (K) ratio to nitrogen (N).
Potassium enhances cell wall structure and carbohydrate storage, directly supporting stress tolerance against cold temperatures, fungal pathogens, and moisture fluctuations.
Best results are achieved when fertiliser is applied while soil temperatures remain above 14°C, facilitating optimal nutrient uptake.

Pre-Emergent Herbicide Application

An autumn pre-emergent program is essential for mitigating winter annual weeds such as wintergrass and bindiis.
Select a pre-emergent suitable for your turf species (we use Oxadiazon for buffalo) and apply before soil temperatures drop below germination thresholds (generally early to mid-autumn, although in Townsville you’ll get away with it right through until winter, as long as the weeds haven’t already matured).
Apply when you’re expecting light rainfall or cycle irrigation for 5 minutes per station to activate the herbicide barrier.

Iron Supplementation for Aesthetic and Functional Gains

Foliar application of chelated iron products can significantly enhance turfgrass colour without promoting excessive top growth, which is particularly desirable heading into winter dormancy phases.
Apply at recommended rates, ideally in the morning to minimise leaf burn. For those reading this who live further south, avoid application when frost is expected.

Integrated Pest Management for Autumn Pests

Monitor for white curl grub activity, as larvae continue feeding into the cooler months.
Adopt a preventative approach with systemic insecticides such as acelepryn, ensuring thorough soil coverage.
Regular inspections and early intervention are critical components of effective IPM protocols.

Additional Autumn Best Practices

• Mowing: Gradually raise mowing heights to increase photosynthetic surface area, promoting carbohydrate storage.

• Leaf Management: Remove built up leaves or fallen palm fronds promptly to prevent disease pressures and sunlight being blocked.

• Irrigation Management: Adjust irrigation schedules to match decreased evapotranspiration rates, favouring deep, infrequent watering. Hunter Hydrawise controllers have a setting that will automate this process.