Primo HG | Turf Growth Regulator

Syngenta Primo HG Turf Growth Regulator 500mL

Make good turf, great.

Bring professional turf results to the home lawn with Primo HG – the only turf growth regulator registered for home use in Australia.

Primo HG slows leaf and stem growth, redirecting your lawn’s energy into stronger roots and denser, greener coverage. The result is a healthier, more resilient lawn that looks great and needs less mowing.

Why Choose Primo HG

• Less mowing: Slows leaf growth for up to 4 weeks, reducing clippings and the chance of scalping.
• Greener, denser turf: Promotes finer, more even leaf blades for a smooth, professional finish.
• Stronger roots: Boosts drought and heat tolerance by helping your lawn use water and nutrients more efficiently.
• Stress protection: Pre-conditions turf for hot summers and dry conditions, keeping it greener for longer.
• Ideal before holidays: One application before going away keeps your lawn under control while you’re gone.
• Easy to use: Comes in a convenient 500 mL twin-chamber bottle for accurate mixing.

How It Works

Primo HG is absorbed through the leaf, reducing shoot elongation while allowing the roots to keep growing. This shifts the plant’s energy balance, resulting in thicker, stronger turf with improved colour and surface quality.

Growth regulation starts within 3 to 5 days of application and lasts 2 to 6 weeks, depending on your lawn type, weather, and management practices. You can expect up to 50% less mowing and clippings during this time.

Application Tips

• Shake the bottle well before mixing.
• Mix only what you need for the day’s application.
• Apply evenly to the leaf surface.
• Avoid mowing 6 hours before or after applying.
• Clean your sprayer thoroughly after use.

Suitable For

Primo HG can be used on most common home lawn varieties, including:

• Buffalo
• Couch and hybrid couch
• Kikuyu
• Fescue
• Perennial ryegrass
• Bent grass
• Carpet grass

Professional Results, Home Convenience

Trusted by turf managers across Australia, and now for home use, Primo HG delivers consistent, high-quality results — improving surface density, resilience, and colour while cutting down your mowing time.

Achieve professional turf quality at home with Primo HG.