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Final-San-O Non-Selective Grass and Broadleaf Herbicide

Final-San-O is a fast-acting weed, grass, algae and moss killer. It's a non-selective herbicide that controls many common annual weeds. It suppresses the growth of some bi-annual and perennial weeds. NOP Approved and OMRI® Listed*, Final-San-O can be used at any time during the year, and areas can be re-sown 5 days after treatment.

*OMRI® Listed with conditions.

Final-San-O hero image

Final-San-O is for use against the following pests:

  • Annual bluegrass
  • Chickweeds
  • Dandelion
  • Large crabgrass
  • Mustards
  • Plantain
  • Redroot pigweed
  • Thistle
  • Moss
  • Algae and lichens

Final-San-O can be used with the following crops:

  • Vegetables
  • Organic vegetables

For more information, please consult the product label.

Final-San-O Applications

Active Ingredient: Ammoniated soap of fatty acids

Rates: 26 oz. in 1 gallon water applied at 75 to 200 gallons/acre (2.0 to 5.0/1,000 square feet)

Re-entry Interval: 24 hours

Days to Harvest: 0


Best results with Final-San-O are obtained with young, actively growing weeds less than 5 inches high. It works best during warm and dry conditions. Application during cold weather may delay appearance of plant damage. If rain falls within 3 hours of treatment, an additional spray may be required.

Organic Crops

NOP Approved:

This product is approved for organic production by the National Organic Program (NOP), a marketing program housed within the United States Department of Agriculture (USDA) Agricultural Marketing Service, the agency that sets marketing standards. The NOP mission is to develop and implement national standards that govern the marketing of agricultural products as organically produced, to facilitate commerce in fresh and processed food that is organically produced, and to assure consumers that such products meet consistent standards.

OMRI Listed®:

This product is OMRI Listed, therefore it is determined by the Organic Materials Review Institute (OMRI) to be suitable for use in certified organic production.

*OMRI® Listed with conditions.

OMRI Certificate Printer friendly PDF format