Brunnings Fast Action Organic* Weed Kill is a contact weed control that acts on the foliage, causing it to quickly dehydrate and collapse. Results are seen as browning and wilting usually within hours of application.

*This product is allowable for use on farms (or in facilities) certified to the Australian Organic Standard.

• Glyphosate free
• Visible results within hours
• Non-residual
• Contact herbicide

The Organic version of Brunnings Fast Action Weed Kill is a popular choice for pet owners and eco-conscious gardeners because it swaps out harsh synthetic chemicals for a plant-derived active ingredient.

The Active Ingredient: Nonanoic Acid

Unlike the standard version which uses Glyphosate, the organic version uses Nonanoic Acid (also known as Pelargonic Acid).

Where it comes from: Nonanoic Acid is a fatty acid that occurs naturally in plants like geraniums.

How it works: It is a contact herbicide. Instead of poisoning the plant from the inside, it dissolves the waxy outer layer of the leaves. This causes the plant cells to leak and rapidly dehydrate, essentially burning the weed.

Key Benefits:

Speed: You will often see weeds start to wilt, turn brown, or collapse within 1 to 4 hours. The standard version usually takes days to show the same progress.

No Soil Residue: Because it’s a fatty acid, it breaks down almost immediately in the soil. You can safely replant flowers or veggies in the same spot just a few days later.

Glyphosate-Free: For those concerned about the long-term environmental or health debates surrounding Glyphosate, this offers a cleaner option and peace of mind.

Rainproof Fast: It is usually rainproof within 30 minutes, making it great for unpredictable weather.

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