Couch Grass Lawn Care

Couch grass is valued for its fine texture, deep colour and ability to spread into a thick, durable lawn. When fed correctly, it grows dense enough to naturally crowd out weeds, recovers quickly from foot traffic, and maintains a rich green colour throughout the growing season.

Because couch grows across the surface using runners (stolons), it relies on steady and efficient nutrient supply — especially during warmer months when growth is fastest.

What Fertiliser Does Couch Grass Need?

Couch lawns respond best to a liquid lawn fertiliser that provides fast colour improvement, supports dense runner growth, and delivers micronutrients that protect against yellowing and stress.

Use CompleteGrow Lawn Grow – Hose-On Liquid Lawn Fertiliser as your primary lawn feed. Its foliar + root uptake gives fast green-up and even colour across the entire lawn.
Quick-release Nitrogen (7%) supports strong leaf growth and richer green colour.
Balanced Potassium (1.5%) promotes turf resilience, heat tolerance, and wear recovery.
Chelated Iron (2.9%) prevents yellowing and keeps couch grass deep, lush green.
Calcium & Manganese improve cell structure and lawn strength during active growth.

CompleteGrow Lawn Grow – NPK 7-1-1.5 + Iron

Designed for deep-green colour, dense turf thickness and fast visible results. Suitable for Couch, Buffalo, Kikuyu & Zoysia. Ready-to-use hose-on bottle — simply connect & spray evenly.

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When & How to Fertilise Couch Grass

Couch grass grows most actively during warm weather. Feeding during this period encourages thick coverage, strong runner spread, and rich colour. During cooler months, growth slows and the lawn naturally requires less feeding.

Seasonal Feeding Schedule

Spring: Begin feeding once daytime temperatures consistently warm. Apply Lawn Grow every 3 weeks to support new growth and fast green-up.
Summer: Continue feeding every 3 weeks to maintain deep colour and dense turf during peak growth and foot traffic.
Autumn: Apply one or two final feeds to strengthen the lawn before cooler weather slows growth.
Winter: Pause feeding when growth is dormant. Resume as weather warms.

How to Apply Lawn Grow Correctly

Water the lawn lightly first if dry — this helps improve nutrient uptake.
Attach the hose-on bottle and spray evenly while walking at a steady pace.
Spray leaf blades directly — couch absorbs nutrients both through leaves and roots.
Apply early morning or late afternoon to avoid evaporation and scorching heat.
Do not mow immediately after feeding — wait 24 hours to allow foliar absorption.

For new lawns (freshly laid roll-on turf or new runners), feed at half-strength every 3–4 weeks once roots have taken, then move to the standard schedule above.

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Common Couch Grass Fertiliser Mistakes (and How to Avoid Them)

Even well-maintained couch lawns can lose colour or density if fertilising habits are inconsistent. These are the most frequent issues that affect couch performance — and how to prevent them.

Mistake 1: Feeding Too Infrequently

Couch grass grows quickly in warm months and uses nutrients fast. Long gaps between feeds lead to pale colour and thin turf. Apply Lawn Grow every 3 weeks during active growth to maintain consistent green and strong runner spread.

Mistake 2: Relying Only on Granular Fertiliser

Granular fertiliser can create uneven colour because couch spreads across the surface. Liquid feeding ensures even absorption across all runners, producing a uniform-looking lawn.

Mistake 3: Ignoring Iron Deficiency

Yellowing or dull colour is often caused by low iron — especially in sandy or coastal soils. Lawn Grow contains Chelated Iron (2.9%), which restores deep green colour quickly and safely.

Mistake 4: Fertilising in the Middle of the Day

Heat reduces nutrient uptake and can stress the lawn. For best results, apply Lawn Grow:

Before 10am
or after 4pm

Frequently Asked Questions

How often should I fertilise couch grass?

Apply Lawn Grow every 3 weeks during the growing season (Spring–Autumn). Couch grows fast and uses nutrients quickly, so consistent feeding keeps it dense and green.