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



Fine tune PGR apps for better seedhead suppression

So, you implemented your PGR program this year like every other year, but you got annual bluegrass seed head production anyway. Chances are, say researchers at Michigan State, your timing probably was off. Read more on applications from this article.  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 »


Primo Maxx: To reapply or not?

Making the decision to apply a plant growth regulator like Primo Maxx is easy. To maintain constant growth suppression and prevent rebound, sequential applications must occur at the maximum suppression point, where growth is maximally suppressed by the prior application. Read more on the second application from this article.  Read more »


Golfdom showcases agronomic planning with Hole of the Month series

Syngenta has partnered with Golfdom magazine to showcase the impressive work superintendents do to keep their courses in top playing condition. Each Hole of the Month article highlights how the superintendent overcame challenges on their particular course, and features an image of one of the holes on their course.  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.

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Tank Mixing Products(PDF)

Tank Mixing Tips and Procedures