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Primo Maxx II

Last updated:

Growth Regulator

Authorisation Number: 
MAPP 17509 PCS 05401
Pack size: 
5 litres
10 litres
20 litres

Turf Rewards Points: 

4 x 5 litres = 5 points

2 x 10 litres = 5 points

1 x 20 litres = 5 points

Activity Group: 
Plant Growth Regulator
SL Soluble Liquid

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 Description
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

  • PRIMO MAXX Turf Growth Regulator will promote greener, denser, more resilient turf with less growth, fewer clippings and therefore less expensive maintenance. PRIMO MAXX II is the trusted growth regulator that pre-conditions turf for stress and optimises surface quality and colour.


    • Works by slowing 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 are stimulated.


    • Enhanced playing surfaces with improved turf quality and colour
    • A valuable tool for pre-conditioning greens for hot, stressful summers – treated turf grows a stronger, deeper and more robust root system which leads to better heat stress tolerance, less wear and tear, and improved disease and pest tolerance
    • Regular applications deliver increased quality and durability

    The recommended use rates are designed to give approximately a 20 to 50% reduction in clippings over a 2 to 6 week period. Full growth regulation by PRIMO MAXX II begins about 3 to 5 days after application.

    In practice the amount of growth regulation achieved will vary between situations due to environmental conditions and management practices. To some extent, therefore, application rates will need to be adjusted to match growing conditions, management practices and the amount of growth regulation required by the turf manager.

    Repeat applications can be made as soon as turf resumes growth or more suppression is required. Areas treated with PRIMO MAXX should continue to receive regular maintenance practices, including irrigation, fertilisation, and weed, disease and insect control when necessary, as recommended for quality turf.