Carrot

• 1. Introduction

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  Carrot is one of the most familiar vegetables on earth, yet its story reaches back thousands of years to the mountain ranges of Central Asia, where ancient people had no interest in the root at all. In 2024, world production of carrots combined with turnips hit 45 million tonnes. But the first cultivators were after something else entirely. They wanted the leaves and the seeds. What transformed this weedy, bitter-rooted plant into the sweet orange staple eaten across the globe today? Why do carrots look the way they do? And why did the British government once encourage its citizens to eat as many as possible, even to the point of making jam from them? The answers run through Roman kitchens, Dutch breeding yards, and a wartime propaganda machine that pulled off one of history's most successful food myths.

• 2. Seeds Before Roots

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  Carrot seeds have been found in Switzerland and Southern Germany dating back to 2000-3000 BC, and their presence there tells us something important: the people who grew them were not thinking about dinner. Those early cultivators grew the carrot for its aromatic leaves and seeds, placing it in the same practical category as parsley, coriander, fennel, anise, dill, and cumin. All of these are close relatives, and some are still grown today for exactly those parts.

  The first time anyone in the classical world bothered to record the root as something edible was in the 1st century AD. The Romans ate a root vegetable called pastinaca, though scholars are uncertain whether that name referred to the carrot or to the closely related parsnip. The two plants were frequently confused. In Old English, white carrots were not clearly distinguished from parsnips at all.

  The most detailed early description comes from the Juliana Anicia Codex, a 6th-century copy made in Constantinople of the Greek physician Dioscorides' pharmacopoeia De Materia Medica, originally written in the 1st century. That text notes simply that the root can be cooked and eaten. A later copy, the Codex Neapolitanus from the late 6th or early 7th century, reproduces similar illustrations but with the roots shown in purple, suggesting that the orange carrot most people picture today was still centuries away from becoming the default.

• 3. From Iran to Amsterdam

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  The domesticated carrot almost certainly originated in Iran, where wild ancestors grew across what was then Greater Persia. Carl Linnaeus formally described the wild species as Daucus carota in 1753 in his Species Plantarum. The selective breeding that followed over many generations gradually reduced bitterness, increased sweetness, and shrank the woody core that made raw wild carrots nearly inedible.

  In the 8th century, the Moors introduced the plant into Spain. By the 10th century, roots from West Asia, India, and Europe were typically purple. The modern carrot is considered to have originated in Afghanistan around that same period. The 11th-century Jewish scholar Simeon Seth described both red and yellow varieties, and so did the 12th-century Arab-Andalusian agriculturist Ibn al-'Awwam, whose writings documented the carrot's spread across the Mediterranean world. Cultivated carrots appeared in China in the 12th century and reached Japan in the 16th or 17th century.

  The orange carrot, the variety now synonymous with the vegetable itself, was developed by Dutch growers. Pictorial evidence suggests that an orange carrot existed as early as 512 AD, but a stable, reliably reproducible orange variety was likely not achieved until Dutch breeders produced the cultivar called the Long Orange at the start of the 18th century. A popular story holds that Dutch growers created the orange carrot to honor William of Orange and the Dutch flag of the era. Other authorities argue this claim lacks convincing evidence, and point to a more practical explanation: the orange carrot does not brown soups and stews the way a purple carrot does, making it more visually appealing in cooking.

  By the 17th century, carrots had arrived in colonial America, brought by European settlers. John Aubrey, the English antiquary who lived from 1626 to 1697, recorded a local memory that carrots were first sown at Beckington in Somersetshire, and that some very old man there in 1668 still remembered their first bringing to the area.

• 4. The Wartime Myth

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  During the Second World War, a rumour spread across Britain that eating carrots would improve a person's ability to see in the dark. By 1942, that belief was so widespread that British people had generated a 100,000-ton surplus of carrots from extra wartime production. The real explanation for British pilots' success in nighttime air battles had nothing to do with diet. It was the introduction of radar.

  The British government did not simply allow the carrot myth to circulate. It actively cultivated it as a way to explain RAF capabilities without revealing the existence of radar technology. The consumption of carrots was meanwhile promoted through a campaign called Dig for Victory, which encouraged citizens to grow their own food. A radio programme called The Kitchen Front pushed carrots in particular, urging people to find novel uses for the surplus, including carrot jam and something called Woolton pie, named after Lord Woolton, who served as the Minister for Food.

  To be precise about the biology: beta-carotene from carrots does not improve night vision in people who already have adequate vitamin A. It does help people who suffer from vitamin A deficiency, which is the grain of truth the myth was built around. The carrot's reputation as a vision food outlasted the war by decades, lodging itself in popular culture long after the propaganda that created it had been forgotten.

• 5. Inside the Root

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  Daucus carota is a biennial plant, which means it operates on a two-year cycle. In its first year, it stores energy in its taproot. It uses that stored energy to flower in its second year. The first true leaf appears about 10-15 days after germination, and the plant's flowering stalk can eventually reach between 60 and 200 cm tall.

  Most of what a person eats when they eat a carrot is the taproot's outer cortex, called the phloem, surrounding an inner core called the xylem. High-quality cultivars have a large cortex relative to their core. Root dimensions vary considerably: diameter ranges from 1 cm to as much as 10 cm at the widest point, and length runs from 5 to 50 cm, though most fall between 10 and 25 cm.

  The bitterness that some people taste in carrots traces to a specific compound: falcarindiol, which is the main chemical responsible for that quality. Falcarindiol also shows antifungal activity against Mycocentrospora acerina and Cladosporium cladosporioides. The carrot belongs to the Apiaceae family, a group of vegetables that produce polyacetylenes, compounds with cytotoxic properties.

  The carrot is a diploid species with nine pairs of chromosomes, giving it a total count of 2n=18. Its genome is estimated at 473 mega base pairs, which is roughly four times the size of Arabidopsis thaliana's genome and about one-fifth the size of the maize genome.

• 6. Growing and Eating

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  Carrots are grown from seed and can take up to four months to mature, though most cultivars reach harvest within 70 to 80 days under good conditions. They do best in full sun at temperatures between 16 and 21 degrees Celsius, in deep, loose, well-drained soil with a pH of 6.3 to 6.8. Rich or rocky soils cause the roots to grow hairy or misshapen.

  The most devastating disease affecting carrot crops is Alternaria leaf blight, which has been known to destroy entire harvests. Physical splitting and breaking can affect more than 30% of commercial crops; wide plant spacing, early sowing, and long growth periods all raise the risk. On the pest side, the carrot fly, Chamaepsila rosae, causes damage through its maggot larvae, which eat the outside of the root.

  In the kitchen, only 3% of the beta-carotene in a raw carrot is released during digestion. Pulping, cooking, and adding oil can raise that figure to 39%. Carrots feature in cuisines across the world: alongside onion and celery, they form the foundation of the French mirepoix used in broths; in north India, carrots are cooked in milk until solid and combined with nuts and butter to make gajar ka halwa; and since the late 1980s, baby carrots have been a widely available snack food in supermarkets.

  One of the more unusual legal decisions surrounding carrots came from the European Union, which generally restricts the making of jam to fruit. To protect the Portuguese tradition of Doce de Cenoura, a carrot jam, the Council of the European Union passed a directive specifically classifying carrots as fruit for the purposes of jam regulation.