What does fertiliser mean?
A fertiliser is any substance — whether natural, such as manure and compost, or manufactured, such as ammonium nitrate — applied to soil or plants to supply the nutrients they need to grow. The most important nutrients are nitrogen, phosphorus, and potassium, often referred to collectively as NPK. Fertilisers are central to modern agriculture: synthetic varieties underpinning the twentieth century's dramatic increases in crop yields, a shift often called the Green Revolution. At the same time, overuse of fertiliser can cause environmental harm, washing into rivers and contributing to algal blooms and water pollution. The word is used neutrally across farming, gardening, and environmental discussion. It is spelled "fertiliser" in British English and "fertilizer" in American English. Understanding the term is useful not only for gardeners but for anyone following debates about food production, sustainability, and the global economy.
nounA substance, natural or synthetic, that is added to soil or plants to supply nutrients and promote growth.
- A substance added to soil or plants to provide essential nutrients such as nitrogen, phosphorus, and potassium, promoting growth and increasing crop yields.
"The farmer spread fertiliser across the fields before the spring planting."
"The gardener worked a slow-release fertiliser into the soil around the tomato plants."
"Rising fertiliser prices pushed food costs higher across the region."
Standard plural; commonly used when discussing different types of fertiliser, e.g. organic versus synthetic fertilisers.
"Organic fertilisers release nutrients more slowly than their synthetic counterparts."
Without synthetic fertilisers, it's estimated the world could feed only around half of its current population — a single invention changed agriculture forever.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of fertiliser
The word derives ultimately from the Latin "fertilis," meaning fruitful or productive, which also gives us "fertile" and "fertility." It entered English usage through the practice of referring to substances that made soil fruitful, with the verb "fertilize" appearing in English by the seventeenth century. The noun form describing the substance itself became widespread as agricultural science developed from the eighteenth and nineteenth centuries onward, notably through the work of scientists such as Justus von Liebig on plant nutrition.
Related word forms
How fertiliser is actually used
"Fertiliser" is chiefly British; American English uses "fertilizer." The word is neutral in register and common in both agricultural and everyday gardening contexts. In scientific writing about human or animal reproduction, the related verb "fertilise" is used rather than this noun.
Easily confused with fertiliser
Fertiliser is the standard British spelling, while fertilizer is the American spelling of the same word.