Getting the Lawn Through a Hot, Dry Summer

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

Fertiliser and chemical treatments

We are currently in the dormancy period, which typically runs from late May to August in Queensland. Do not fertilise your courts right now. Nutrients will leach into the groundwater and risk burning stolons when growth resumes.

Your spring application should occur in September. Use a balanced NPK fertiliser, such as 16-6-8 or 15-5-10. Apply this at a rate of 3 to 4kg per 100m² to trigger recovery.

The summer application follows in December. Use moderate nitrogen only and avoid phosphorus. Combining extreme heat with a lush nitrogen flush is the wrong move. It produces soft, disease-prone growth that mows poorly.

Potassium is the "toughening" nutrient that builds drought and heat tolerance. This is normally banked during the March autumn application.

Liquid iron is a tool for deepening colour before a tournament. It is not a stress treatment. Be careful with application, as it can permanently stain your equipment and paths.

If your club has not had a soil test in two or three years, do it now during dormancy. Labs like Nutrient Advantage or SESL Australia provide analysis for roughly $80 to $150. This ensures your September application is targeted.

Wetting agents

Sandy or coastal soil profiles in coastal Brisbane, the Gold Coast, and the Sunshine Coast often go hydrophobic after extended dry periods. This prevents water from 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.

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

Watering practice

Deep and infrequent watering is superior to daily light watering. Aim for 10 to 15mm every two to three days to grow roots downward.

Always water in the early morning before 8am. Watering in the afternoon or evening leaves moisture on the leaf overnight. This is 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 one-third of the blade height in a single pass. Taking too much off stresses the grass and causes scalping. Do not scalp a lawn that is already heat-stressed.

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

If you need specific advice on adjusting mowing heights to combat drought, contact a professional. You can find a qualified agronomist through Turf Queensland.

The no-capital path

Some clubs operate 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. It is about 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?.

For those landing here outside the dry season, see Lawn Care Through a Queensland Summer.

Please share in the comments what has worked on your own courts.