What are Plant Growth Regulators? - Lawn Solutions Australia

What are Plant Growth Regulators?

Stadium quality turf with PGR’s

We know many of you are always looking for ways to take your lawns to the next level. One way to do this is by using what the turf professionals use, Plant Growth Regulators. Used on golf courses and sports grounds across the world, Plant Growth Regulators commonly known as PGR’s, are now available in an economical size to use in your own back garden.

In this article we focus in on the benefits of plant growth regulators, Primo HG by Syngenta specifically, that can help your lawn perform like stadium quality turf.

What is a Plant Growth Regulator or PGR?

A PGR is an innovative solution that influences a plant’s growth and development.

Recent types of PGRs, such as Syngenta’s turf growth regulator Primo HG or Primo Maxx are formulated as a micro emulsion concentrate that quickly enters the leaves and shoots before systemically moving throughout the entire plant.

Primo HG 500ml (Primo Maxx)
Primo HG 500ml (Primo Maxx)

Better looking lawns, faster:

  • Reduces grass growth: reduced mowing.
  • Less bare patches: improved aesthetic.
  • Greener grass.
  • The best-looking edges with less work.

Once absorbed, the active ingredient works to temporarily block the plant’s ability to produce a growth hormone called Gibberellic Acid. This suppresses the plant’s vertical growth while allowing normal processes like photosynthesis and respiration to continue.

Energy is diverted into the plant’s lateral growth, resulting in smaller and finer leaves, increased tillering, and a larger, deeper root mass. The turf becomes denser with a more vibrant colour.

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Save water with PGRs

Regular PGR application ticks a lot of sustainability boxes, the biggest one being greener grass with less water requirements.

PGRs like Primo HG improve water management efficiency by encouraging the stomates (pores) of a plant to close for longer periods, which slows down the rate of water lost through transpiration.

Control growth and mow less

Slowing down turf growth also decreases the need to mow, which in turn reduces waste and makes maintenance practices far more sustainable. Applying Primo HG/Maxx to turfgrass effectively holds back vertical grass growth within 3 to 4 weeks of initial application.

PGR results

Stand up to turf stress and extreme heat

Increased temperatures add to turf stress in all situations, resulting in an undesirable loss of colour, turf density and quality.

Build a tougher lawn:

  • Increased root density: drought resistance & improved lawn resilience
  • Increased density: improved shade tolerance
  • Increased durability: hardier under children and pet use

The main reason is that PGR applications like Primo HG increase the level of bioactive cytokinin’s in the plant, improving its tolerance to heat and drought-induced stress. This allows the turf to recover faster from drought effects, extreme heat, or stress from high traffic and heavy play.

PGR TIP:

The right application is always key to achieving good results with a PGR, so it’s important to track the growth rate of your turfgrass alongside the rate of PGR application. When using Primo HG for the first time leave an area to the side untreated so you can compare the results of your application.

What does Primo HG do?

Primo HG forces the grass to grow thicker instead of taller. The lateral stems become fuller as the colour of the lawn becomes a nicer shade of green. Your lawn will not only be lush and attractive, it will have what it needs to stay that way.

Primo HG 500ml (Primo Maxx)
Primo HG 500ml (Primo Maxx)

Primo HG Promotes deeper, stronger roots

Instead of using energy on growth, it uses it on creating healthier roots

Primo HG Improves water use efficiency

The grass makes the most of the water it receives, whether rain or irrigation, less water use

Primo HG helps turf tolerate shade

Shady areas naturally grow thin; Primo assist with this.

Primo HG creates stronger, denser turf

Stronger, denser turf resists wear and disease better and helps suppress weeds.

  • Promotes denser, healthier turf that is better able to withstand a variety of stresses including heat, drought, diseases and traffic.
  • Slows the production of gibberellic acid, a plant hormone that promotes cell elongation. Vertical shoot growth is slowed, while lateral and below-ground growth of rhizomes, stolons, tillers and roots is stimulated.
  • Reduces mowing by up to 50%.
  • Is claimed to supress Winter grass growth.
  • Cuts mowing in half, reduces seed head production, fertilizer use, watering and clipping yield, makes lawns look great with half the work or for less than 3 cents a square metre.

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