The flower markets of the world operate in a parallel chronology. While the rest of the city sleeps, the flower trade is at its peak — a frenzy of buying and selling that begins in the small hours and is over by the time the first commuters reach their desks. To visit a flower market at dawn is to see a city at its most elemental: not the city of monuments and museums and carefully tended public spaces, but the city of work, of commerce, of things being moved from one place to another because someone, somewhere, wants them. Here is a journey through six of them, from Amsterdam to Bangkok, in the hour before the world wakes up.

Bloemenveiling Aalsmeer — Amsterdam

Strictly speaking, Aalsmeer is not a market but an auction — the largest flower auction in the world, housed in a building that covers 999,000 square metres and handles twenty million stems a day. The viewing floor overlooks a vast hall where trolleys of flowers are shuttled between cold stores and auction rooms by an automated system that looks like a railway network designed by bees. The auctions themselves are silent now — conducted electronically, the buyers sitting in tiered seats watching screens — but the scale is still staggering. A single Dutch clock, its hand sweeping anti-clockwise past descending prices, sells a trolley of roses every four seconds. By the time you have finished your coffee, ten thousand roses have been bought and sold.

Marché aux Fleurs — Paris

The flower market on the Île de la Cité is the oldest in Paris, operating on the same site since 1808, and it is the most beautiful by some distance. The pavilions are cast iron and glass, Belle Époque confections that look like miniature railway stations, and the vendors are Parisian in the most specific sense: slightly surly, impeccably knowledgeable, and capable of wrapping a bunch of ranunculus in brown paper with a single, fluid gesture that takes approximately three seconds. Come at seven in the morning, when the restaurants are buying and the tourists are still asleep, and you will see Paris at its most functional and most romantic simultaneously — a city that treats flowers as an essential, not a luxury.

Columbia Road — London

Columbia Road on a Sunday morning is a ritual as much as a market. The street, a narrow Victorian terrace in Bethnal Green, is closed to traffic and transformed into a canyon of flowers: buckets of dahlias, sunflowers, peonies, and gladioli lining both sides, the vendors standing on milk crates and shouting prices in a Cockney auctioneer’s cadence that has barely changed in a century. The crowd is half the experience: young couples buying their first houseplants, old East Enders who have been coming for forty years, chefs from Shoreditch restaurants filling canvas bags with whatever is cheap and in season. The secret is to arrive before nine, when the serious buyers have come and gone and the vendors start reducing prices to clear their stock. By eleven, the street is packed. By one, it is empty, and the only evidence that anything happened is a scattering of petals in the gutter.

Devaraja Market — Mysore

The flower section of Mysore’s Devaraja Market is a sensory assault of the most wonderful kind. Mountains of marigolds — the sacred flower of India, used in temples, weddings, and festivals — are piled on tarpaulins in shades of orange and yellow so intense they seem to vibrate. Jasmine is sold by the cubit, strung into garlands on long loops of thread, its scent so thick in the air you can taste it. The vendors, mostly women, sit cross-legged on raised platforms, their fingers moving with the speed of long practice, threading flowers faster than the eye can follow. By nine in the morning, most of the flowers are gone — sold to temples, to wedding planners, to households where a fresh garland is hung above the door every day. What remains is the scent, which lingers in the market’s stone corridors long after the last petal has been swept away.

Pak Khlong Talat — Bangkok

Bangkok’s flower market is, like everything in Bangkok, a study in controlled chaos. It operates twenty-four hours a day, but the main action happens between midnight and dawn, when trucks from the highland farms around Chiang Mai and Chiang Rai arrive with their cargoes of orchids, lotuses, and marigolds. The orchids are the main event — dendrobiums in purple and white, mokaras in orange and red, vandas in blue — and they are sold in bundles of a hundred for prices that will make any Western florist weep. The market sprawls along the Chao Phraya River, and the best way to experience it is to arrive at three in the morning, when the air is cool and the river is dark and the market is a blaze of colour and noise and the particular, heady scent of a million orchids packed into a single city block. By dawn, the trucks have gone and the market shifts into its daytime mode — still busy, but slower, the urgency replaced by the rhythm of ordinary commerce.

Mercado de Jamaica — Mexico City

The Mercado de Jamaica is not the oldest market in Mexico City, but it is the most flamboyant. The flower section occupies an entire city block and is organised, like the city itself, by colour and by species: one aisle for roses, another for lilies, a third for the marigolds that are so central to Día de los Muertos. The market serves a city that consumes flowers at a rate unmatched anywhere in the Americas — for festivals, for saints’ days, for the daily offerings at roadside shrines, for the simple, irreducible pleasure of having something beautiful in the house. The vendors are famous for their banter and their bargaining, and a visit to Jamaica is as much a social experience as a commercial one. Come in the early morning, when the first shipments arrive from the flower-growing regions of Puebla and Morelos, and the market smells of damp earth and crushed petals and the particular, indefinable scent of a city waking up surrounded by flowers.