Chateau® EZ herbicide is a new liquid formulation PPO inhibitor that works as a barrier on the soil surface providing season-long residual control of tough broadleaf and grass weeds.

Technical information

Herbicide group: Group 14
Active ingredient: Flumioxazin 479.2 g/L
Packaging: 4 x 910 mL case
Rainfast: Requires ½ inch of rain or irrigation for activation
PCP #: 34036

Registered crops

  • Asparagus
  • Blueberry (highbush and lowbush)
  • Broccoli 
  • Celery
  • Dry bulb onion
  • Dry bulb shallot
  • Established mint (peppermint and spearmint)
  • Field pepper
  • Garlic
  • Grape
  • Hops
  • Nut trees
  • Pome fruit
  • Potato (Western Canada only)
  • Succulent peas
  • Stone fruit
  • Strawberry
  • Sweet potato


  • Long-lasting residual, pre-emergent broadleaf weed control with bonus grass suppression
  • Chateau stays where it is sprayed and will not leach or volatilize
  • New liquid Group 14 herbicide (PPO inhibitor) works differently than many other commonly used herbicides, helping to manage resistance
  • The herbicide barrier cannot be disturbed after moisture activation
  • Offers flexible application timing

General usage information

  • Moisture is necessary to activate Chateau in soil for weed control (½ inch of rain or irrigation)
  • This product will not control emerged weeds unless tank mixed with a labeled burndown herbicide
  • Significant crop injury may occur from applications made to poorly drained soils and/or applications made under cool, wet conditions
  • Do not apply to farm alleys or roads where traffic may result in treated dust settling onto crops or other desirable vegetation
  • Application to non-dormant crops or when soils are flooded after application may result in non-acceptable crop injury, including yield loss
  • Use appropriate water volumes to ensure good coverage
  • Apply prior to weed emergence
  • Undesirable crop injury may occur if Chateau comes in contact with fruit or foliage
  • DO NOT tank-mix with Dual II Magnum® or Frontier® Max