Skip to content
FREE Same Day Shipping - Order by 3pm CST (business days)
FREE Same Day Shipping - Order by 3pm CST (business days)
Posted By Bryant Dinwiddie On June 11, 2026

Growth Regulators and Their Longevity

How Long Do Turfgrass Growth Regulators Last?

Turfgrass growth regulators (PGRs) are increasingly used by golf courses, sports turf managers, and lawn care professionals to improve turf quality while reducing mowing requirements.

One of the most common questions is: How long will a PGR application last?

The answer depends on the active ingredient, application rate, turf species, fertility program, and environmental conditions. Some PGRs, such as ethephon, are commonly used for shorter-term growth management and seedhead suppression, while others provide extended regulation and fewer applications throughout the season.

Benefits of PGR Programs

  • Reduced mowing frequency
  • Improved turf density and appearance
  • Better clipping management
  • Seedhead suppression
  • Enhanced stress tolerance
  • More consistent growth between service visits

For lawn care operators, PGRs can help maintain a cleaner, more manicured lawn between treatments. For turf managers, they can improve playing conditions while reducing labor demands.

The chart below compares the typical duration of growth regulation provided by several commonly used active ingredients, including ethephon, prohexadione-calcium, trinexapac-ethyl, paclobutrazol, and combination programs. Actual performance may vary based on turf species, application rate, temperature, fertility, and overall growing conditions.

Typical Turf PGR Longevity

Expected weeks of visible growth regulation under typical turf and lawn care conditions.

Paclobutrazol + Trinexapac-ethyl
7.5 wks
Paclobutrazol
6.5 wks
Trinexapac-ethyl
3.5 wks
Prohexadione-Calcium
2.5 wks
Ethephon
2 wks

Actual performance may vary based on turf species, application rate, temperature, fertility, irrigation, mowing frequency, and overall growing conditions.

Next article Long-Term Pond & Lake Algae Control with Phoslock

Products With Growth Regulators and Their Longevity

  • Sale Sale

    Paclo 2SC

    Tide
    Active Ingredient:
    Paclobutrazol: 22.3%
    $209.95
    $209.95 - $209.95
    $209.95
    $189.26
    $189.26 - $189.26
    $189.26
    in stock

    $209.95
    $209.95 - $209.95
    $209.95
    $189.26
    $189.26 - $189.26
    $189.26
    Sale Sale

  • Trin-Pac Select Plant Growth Regulator

    Albaugh Specialty
    Active Ingredient:
    Trinexapac-Ethyl: 11.3%
    $135.95 - $335.00
    $335.00
    $135.95 - $335.00
    $335.00
    in stock

    $135.95 - $335.00
    $335.00
    $135.95 - $335.00
    $335.00

  • Groom PGR

    RightLine
    Active Ingredient:
    Trinexapac-Ethyl: 11.3%
    $125.95 - $310.00
    $310.00
    $125.95 - $310.00
    $310.00
    in stock

    $125.95 - $310.00
    $310.00
    $125.95 - $310.00
    $310.00

  • PROHEX 27.5 WDG Turf

    RightLine
    Active Ingredient:
    Prohexadione Calcium: 27.5%
    $395.00 - $395.00
    $395.00
    $395.00 - $395.00
    $395.00
    in stock

    $395.00 - $395.00
    $395.00
    $395.00 - $395.00
    $395.00

  • Pac-Low SC

    Quali-Pro
    Active Ingredient:
    Paclobutrazol: 22.9%
    $229.95 - $229.95
    $229.95
    $229.95 - $229.95
    $229.95
    in stock

    $229.95 - $229.95
    $229.95
    $229.95 - $229.95
    $229.95

  • Ethephon 2SL

    Quali-Pro
    Active Ingredient:
    Ethephon: 21.7%
    $119.00 - $119.00
    $119.00
    $119.00 - $119.00
    $119.00
    in stock

    $119.00 - $119.00
    $119.00
    $119.00 - $119.00
    $119.00

Active Ingredient

×

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare

Active Ingredient

×