Primo Maxx Plant Growth Regulator | GreenCast | Syngenta

Primo Maxx Plant Growth Regulator

Product Overview

Primo Maxx Plant Growth Regulator Helps Turf Withstand Stress

Primo Maxx® plant growth regulator promotes denser, healthier turf that is better able to withstand a variety of stresses including heat, drought, diseases and traffic. It 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.


Primo Maxx Grass Clipping Comparison


Key Features

  • Useful in the management of difficult-to-mow areas and can be used to minimize the need for edging turfgrass
  • Multiple applications will reduce water use and improve drought tolerance
  • Advanced formulation technology ensures it mixes completely with water and does not settle out in a spray tank

Key Benefits

  • Can be applied at rates of 0.1 to 0.2 fl. oz. per 1,000 sq. ft. every 7 to 14 days to suppress basal rot anthracnose. Use the lower rate when seedheads are present.
  • Can be applied to existing turf infested with stands of Poa annua as part of an overseeding/renovation program
  • Pre-stress conditioning
  • It can extend the duration of marking visibility when applied before or with marking agents



Use of Plant Growth Regulators in Overseeded Bermudagrass

To establish a winter playing surface, bermudagrass golf courses are overseeded in early fall with perennial ryegrass (and Poa trivialis on greens). At the typical overseeding time, growing conditions are still favorable for bermudagrass development.  Read more »


From pain to pleasure

When periods of rain impact mowing operations, roughs can become very unfriendly. Fortunately, these tools covered in this USGA Regional Report can significantly reduce mowing requirements while keeping rough playable even when regular mowing is temporarily disrupted.  Read more »


Pinning down PGRs

Golf Course Industry provides an article on why monitoring temperature is a route toward regulating growth of cool- and warm-season turfgrasses.  Read more »


Show Syngenta how you Condition. Perform. Recover. for a chance to win $2,500

At Syngenta, we know it takes hard work and dedication to properly condition your turf so that, like a professional athlete, it can perform at its best and recover quickly from all types of stress. Additionally, it's important to commit to personal health to perform and recover from daily stress.  Read more »

Download Supporting Primo Maxx Documents

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Effective Overseeding Strategies for the Southwest(PDF)

An overview of effective overseeding strategies for the Southwestern US.

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PGR Application Aid (Printer Friendly)(PDF)

Recommended turf sites and application rates for Primo Maxx and Trimmit.

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PGR Brochure(PDF)

Learn more about Syngenta PGRs Primo Maxx and Trimmit.