Pac O

Ornamental Growth Regulator

Pac O is an extremely active plant growth regulator that can significantly curtail unwanted plant growth through reduced internode elongation.


Current state registrations

Pac O - Ornamental Plant Growth Regulator

Labeled for use on:

Ornamental plants grown in containers in nurseries, greenhouses, shadehouses, and interiorscapes.


Labeled plants:

Including but not limited to bedding plants, azaleas, flowering plants, plugs, liners, foliage plants, poinsettias, hibiscus, chrysanthemums, poinsettias and woody plants.



1 gallon container, 4 per case.



Caution: reuse of pots, trays, or other containers that previously were used for crops treated with Pac O may affect growth of new plantings in such containers. See label for more information. Always read and follow label directions when using this product.

  • EPA Registration Number62097-11-59807
  • Restricted Entry Interval (REI)12 hours
  • Chemical FamilyTriazole
  • MOA1
  • Active IngredientPaclobutrazol
  • Parts per Million (PPM)1 to 30 Drench, 5 to 100 Spray
  • Measure per gallon1 PPM=1mL/gl; 5PPM=4.7 mL/gl; 30 PPM=1 fl oz/gl
  • ApplicationSpray, drench, soak, media spray