Organic cotton vs regular cotton: pesticides, GMOs and labels

The cotton in an organic shirt and a regular one is the same fiber. What differs is the seed it grew from, what was sprayed on the field, and how much you can trust the claim on the tag.

What makes cotton organic

Under US rules, organic crops are grown without synthetic substances unless they appear on a short approved list, and without genetically engineered seed, irradiation or sewage sludge. That isn’t the same as no pesticides at all. A few approved substances and natural pesticides are allowed.

Organic cotton is rare. It was about 706,000 tonnes in 2023/24, 2.9% of the world’s new cotton, and India grew most of it.

What goes on regular cotton

Regular cotton is grown on 2.3% of the world’s arable land and takes 4.0% of its pesticides and 10.51% of its insecticides, according to the International Cotton Advisory Committee’s figures for 2018 to 2022. Those figures come from pesticide maker Bayer’s sales data. About 13% of the pesticides used on cotton are classed as highly hazardous.

In the US, herbicides went on 96% of planted cotton acres in 2021 and insecticides on 39%. Glyphosate was the most widely used.

GM cotton

Most cotton is genetically modified. GM cotton covered 79% of the world’s cotton area in 2019, and in the US in 2025, 91% of upland cotton carried the insect-resistant Bt trait and 93% was engineered to tolerate herbicides.

Bt cotton first cut spraying. In India it halved pesticide applications in its early years. Then pink bollworm evolved resistance and other pests moved in, and Indian farmers now spend more on pesticides than they did before Bt arrived. Herbicide-tolerant cotton pushed glyphosate use up, and by 2019 glyphosate-resistant weeds were found in most US cotton states.

Organic, Better Cotton and regular cotton

	Regular cotton	Better Cotton	Organic cotton
GM seed	Mostly GM (79% of world area, 2019)	Allowed where legal	Banned
Synthetic pesticides	Yes, including highly hazardous ones	Most hazardous banned, the rest allowed	Banned unless on an approved list
Share of cotton, 2023/24	Most of it	About 9% (23% with equivalent schemes)	2.9%
Is it in the product you buy?	Yes	Not necessarily; mass balance	Yes, when the product is GOTS certified

Yields, water and cost

In a four-year field trial in India, organic cotton yielded 14% less on average during conversion, and 29% less in the first cycle, but cost 32% less to grow, so farmers earned about the same. An industry-funded life cycle study reported that organic cotton used 91% less irrigation water than conventional. Its own authors note much of that is because organic cotton tends to be grown in rain-fed regions, not because organic methods use less water.

Organic cotton fraud

The supply hasn’t always matched the claims. In 2020, GOTS, the main organic textile standard, found about 20,000 tonnes of fake organic cotton from India sold with forged certificates and banned 11 companies. GOTS itself doesn’t certify farms. It certifies the processing chain, and the farm has to be certified organic under a national organic rule first.

Better Cotton

Better Cotton, formerly the Better Cotton Initiative, is the largest cotton program. It bans pesticides on international hazard lists and is phasing out others, but it allows GM seed. It works by mass balance: a brand buys credits for an amount of Better Cotton, and the product it sells may contain none of it. In 2024 the investigators Earthsight linked Better Cotton-certified farms in Brazil to illegal deforestation and land grabbing. Better Cotton’s audit cleared three farms but did not examine the companies that own them.

How to tell real organic cotton

The word “organic” on a hangtag is a claim. GOTS certification is a check. A product labeled “organic” under GOTS has to contain at least 95% certified organic fiber, and one labeled “made with organic” at least 70%. GOTS also bans virgin polyester outright, caps recycled synthetics at 20%, and prohibits formaldehyde, PFAS and GM inputs in processing. See what OEKO-TEX and GOTS test for.

Fibers in this guide

• Cotton: not plastic