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Primo Maxx II

Last updated:

Growth Regulator

Authorisation Number: 
Pack size: 
5 litres
10 litres

Turf Rewards Points: 2 x 10litres = 5 points

SC Soluble concentrate

The active ingredient in PRIMO MAXX II, trinexapac-ethyl, causes a temporary halt to the production of gibberellic acid, a plant growth hormone which is responsible for the top growth of the plant. Trinexapac-ethyl is taken up by the foliage of the grass plant and is translocated systemically to the growing point of the plant. After application the turf grass grows more slowly than in untreated areas, with shorter leaf blades

For use as a plant growth regulator on amenity areas, mangaed amenity turf and amenity grassland.

Bowling Greens

Golf Greens

Sports field / Out field (cut at >18 mm)

Tees and fairway type turf (cut at < 18 mm)

Legal warning

Precautionary Statements

  • Avoid breathing dust/ fume/ gas/ mist/ vapours/ spray. Wear protective gloves. IF INHALED: Remove person to fresh air and keep comfortable for breathing. Call a POISON CENTER/doctor if you feel unwell. If skin irritation or rash occurs: Get medical advice/ attention. Take off contaminated clothing and wash it before reuse.

Personal Protective Equipment


Tank mixing

See Art of Application: tank mixing sequence

Tank mix preparation

Ensure that the sprayer or other applicator is clean and calibrated to give the correct volume and an even application.

Implementation particular terms

PRIMO MAXX II may be applied with knapsack sprayers, hand sprayers, boom sprayers and spray-gun application devices.

Mixing and spraying

Add half of the required water to the sprayer. Add the required amount of PRIMO MAXX and then the remaining water and begin agitation. Thoroughly wash all spraying equipment immediately after use. The diluted product must be used on the day of mixing.

Water volume

300 – 1000 litres water per hectare


Typical spray pressure is 2-4 bars.


1 hour

Frost sensitivity


Tank mix lifespan

Immediate use.

Tank mix stability


Type Title Descriptionsort ascending
To preserve the environment

Prevent spray drift.

To minimize yellowing apply readily available nitrogen. Collected clippings must not be composted or used as a mulch as their safety for use on desired plants has not been assessed.

  • In the event of a Toxic or Transport Emergency in the UK please telephone 01484 538 444 at any time