Getting the Lawn Through a Hot, Dry Summer

Turf resilience matters more this year. Read A record El Niño and your courts for the full forecast.

The essential actions

1. Hold off fertiliser during dormancy (late June to August), then apply a balanced NPK fertiliser in September.
2. Apply wetting agents preventively at the start of the dry season, and reapply every six to eight weeks if hydrophobicity is chronic.
3. Water deep and infrequent: 10 to 15mm every two to three days, in the early morning before 8am.
4. Mow at the correct height for the court and follow the one-third rule.
5. Hollow tine your highest-traffic areas from April through May, ahead of dormancy.
6. Run full scarification in the October to November window.

Fertiliser and chemical treatments

The dormancy period typically runs from late June to August in Queensland. Don't fertilise your courts during it. Nutrients will leach into the groundwater and risk burning stolons when growth resumes.

Make your spring application in September. Use a balanced NPK fertiliser, such as 16-6-8 or 15-5-10, at 3 to 4kg per 100m² to trigger recovery.

A December top-up is optional, not routine. Incitec Pivot's own guidance for summer-active turf runs to three feeds a year, adding December at a lower rate, but that guide is written for a golf fairway watered year-round with clippings removed. Your court holds onto more of what it's given, so skip December if it's already growing strongly on wet-season rain, and only feed it if growth looks like it's stalling. Either way, keep December's rate light: piling nitrogen onto summer heat gives you the same lush, disease-prone flush that mows poorly.

Potassium is the "toughening" nutrient that builds drought and heat tolerance. You should have banked this during the March autumn application, well before the dry season sets in.

Liquid iron is a tool for deepening colour before a tournament, not a stress treatment. Apply it carefully: it can permanently stain equipment and paths.

If your club hasn't had a soil test in two or three years, do it now, during dormancy. That way your September application is targeted rather than guessed.

Wetting agents

Sandy or coastal soil profiles in Brisbane, the Gold Coast and the Sunshine Coast often go hydrophobic after extended dry periods. That stops water penetrating the root zone.

Apply wetting agents preventively at the start of the dry season. Proven products for QLD fine turf include DRENCH, Qualibra, CalWet and H2Pro AquaSmart. These are professional turf products, not something you'll find at a general hardware store. Nuturf (nuturf.com.au) supplies Qualibra to QLD sports turf and is a good first call.

If your court suffers from chronic hydrophobicity, reapply these agents every six to eight weeks.

Watering practice

Deep, infrequent watering beats daily light watering. Aim for 10 to 15mm every two to three days to grow roots downward.

Water in the early morning, before 8am. Watering in the afternoon or evening leaves moisture on the leaf overnight, and that's the primary trigger for brown patch fungal disease.

For a full technical walkthrough, see Is your water system ready for summer?

Mowing and aeration timing

Maintain competition courts at 4 to 6mm. Training and general club play are manageable at 8 to 10mm.

Follow the one-third rule: never remove more than a third of the blade height in a single pass. Taking too much off stresses the grass and causes scalping, and you don't want to scalp a lawn that's already heat-stressed.

Aeration is a separate job from mowing, and it comes earlier in the calendar. Hollow tine your highest-traffic areas first from April through May, ahead of dormancy, then top-dress the cores with clean fine sand. A single pass rarely clears a compacted court: two or three passes in different directions, spread across a week, works better than one.

The window for full scarification is October to November, after dormancy recovery but before wet-season fungal pressure peaks. Never scarify during dormancy or mid-summer heat stress.

Need specific advice on adjusting mowing heights to combat drought? Contact a professional. You can find a qualified agronomist through Turf Queensland.

Month by month through the dry season

This calendar is based on South-East Queensland conditions. North Queensland clubs (Townsville, Cairns) should expect a shorter or absent dormancy and can shift these tasks earlier. Darling Downs clubs on black soil should allow extra time for the September application to soak in before mowing resumes at full frequency.

The no-capital path

Some clubs run on mains water only, with no bore, no tanks and no spare budget. You can still protect your courts.

Stick to a strict morning-only watering discipline. Maintain the correct mowing heights and respect the one-third rule. Get your September fertiliser timing right.

These steps cost little or nothing, yet they matter most for surface survival.

Where to go next

Most of what protects a court through a hot summer is timing: knowing what to fertilise and when, and what to leave alone.

Get your deep-watering, wetting-agent and aeration groundwork done before the heat hits, not during it.

Review the forecast in A record El Niño and your courts and check your hardware in Is your water system ready for summer?

Landing here outside the dry season? See Lawn Care Through a Queensland Summer.

Share in the comments what's worked on your own courts.