What is Ammonium Nonanoate?
Ammonium nonanoate, also known as ammonium pelargonate, is a naturally derived compound created by combining nonanoic acid (also called pelargonic acid) with ammonia.
Nonanoic acid is a fatty acid found in various plants and animal-derived substances such as apples, grapes, and dairy products like cheese. The resulting compound is biodegradable, water-soluble, and effective as a contact herbicide.
This substance has gained popularity among organic growers and environmentally conscious landscapers because it delivers powerful weed control while breaking down quickly in the environment.
It is classified as a non-synthetic or “natural origin” substance, which contributes to its acceptance in organic farming systems.
A Brief History of Its Use
Fatty acids have long been known for their herbicidal properties, with ammonium nonanoate emerging as a commercially viable solution in recent decades. Its use became more widespread as demand increased for alternatives to synthetic herbicides, especially glyphosate, amid rising health and environmental concerns.
Initially, ammonium nonanoate was used primarily in greenhouse and nursery settings. Over time, as its efficacy and safety profile became more established, it began to appear in landscape maintenance, right-of-way weed management, and even residential lawn care. Its broad-spectrum effectiveness against moss, algae, grasses, and broadleaf weeds made it an ideal choice for integrated pest management programs.
Why It’s Safer Than Other Herbicides
One of the standout features of ammonium nonanoate is its safety profile. Unlike glyphosate and other synthetic herbicides, ammonium nonanoate is non-systemic and acts only on the plant surfaces it contacts. This reduces the risk of contaminating groundwater, affecting non-target plants, or entering the food chain.
It degrades rapidly in soil and water, typically within a few days, and does not persist in the environment. It is considered non-toxic to birds and mammals and has a relatively low toxicity to aquatic life compared to more traditional herbicides. While it can be an irritant to skin and eyes upon direct contact, the risk is minimal when used according to label instructions.
Because of its natural composition and fast biodegradation, ammonium nonanoate has become a preferred choice for use in sensitive areas such as playgrounds, pet-friendly yards, organic farms, and conservation zones.
How It Works: Mechanism of Action
Ammonium nonanoate is a non-selective, contact herbicide. This means it affects any plant it touches but only impacts the portions of the plant it comes in contact with. When sprayed onto foliage, it penetrates the plant’s waxy cuticle and disrupts cell membranes. This causes the cells to lose structure and moisture, leading to the rapid collapse of plant tissue.
The result is visible within hours: treated leaves and stems will appear scorched or browned, with the plant wilting and dying back quickly. Since it does not move through the plant’s vascular system, roots are generally unaffected, which is why repeat applications are often needed for persistent or perennial weeds.
Recommended Application Rates
Application rates for ammonium nonanoate vary based on the product formulation and the type of vegetation being treated. In general, a 6% solution by weight is common for standard weed control tasks. This equates to about 2.4% ammonium nonanoate in the final spray solution.
The compound is typically applied using sprayers such as hand-held, backpack, hose-end, or boom sprayers. Coverage is crucial—the herbicide must uniformly wet the leaves of the target plants. Without complete coverage, efficacy may be reduced, and subsequent applications may be necessary.
Because the herbicide works on contact, it is often used in conjunction with mechanical or cultural weed control methods for best results.
What Does It Mean to Be OMRI Certified?
OMRI, the Organic Materials Review Institute, is a nonprofit organization that reviews and certifies products for use in organic agriculture and land care. When a product like ammonium nonanoate is OMRI Listed, it means the compound has been evaluated and approved for compliance with USDA National Organic Program standards.
This certification assures farmers, landscapers, and consumers that the product contains no prohibited synthetic substances and can be safely used in organic systems. It also provides peace of mind that the product supports sustainable and ecologically responsible practices.
Why Homeowners Should Consider a Chemical-Free Lawn Removal
More homeowners are rethinking their approach to lawn care, particularly when faced with the need to remove an existing lawn. Traditional methods often rely on harsh chemicals like glyphosate, which is under increasing scrutiny for its potential health and environmental risks.
At Floridist, we specialize in chemical-free lawn removals designed to completely eliminate your existing turf without the use of glyphosate or other synthetic herbicides. Whether you’re preparing for sod replacement or transitioning to a native landscape, we can help you start fresh, safely and sustainably.
Our process leverages organic methods, including certified products like ammonium nonanoate, to effectively suppress grass and weeds. The result is a clean, ready-to-renovate landscape that’s safer for your family, your pets, and the planet.
Ready to remove your lawn the safe way? Contact Floridist today and let us help you reclaim your outdoor space with chemical-free confidence.