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

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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Golf Portfolio Brochure(PDF)

See how the Syngenta portfolio of products can lead to unrivaled turf quality on golf courses.

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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.

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Tank Mixing Products(PDF)

Tank Mixing Tips and Procedures




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 »


Help your turf endure summer stress

Agronomic programs from Syngenta are tailored by region and turf species based on local conditions.  Read more »


Preconditioning your golf course

For golfers and tournaments of all levels, conditioning is essential to developing successful playing techniques and healthy turf. Likewise, as a golf course superintendent, preconditioning your course can prepare your turf for extreme conditions before they develop during the summer.  Read more »


How to Condition, Perform and Recover with Syngenta Agronomic Programs

Proper planning is essential for protecting your turf from the myriad of pests that can attack during the season. In addition to pests, turf is also frequently subjected to abiotic stresses like heat, drought, traffic and shade.  Read more »