Spices come from nearly every part of a plant except the leaf. Cinnamon is tree bark, peppercorns are dried fruit, ginger is an underground stem, cloves are flower buds, and saffron is the tiny reproductive threads inside a crocus flower. Each spice requires its own harvesting method, growing climate, and processing technique, which is why most of the world’s supply traces back to a handful of tropical and subtropical countries.
What Counts as a Spice
The simplest dividing line: herbs come from leaves, spices come from everything else. That “everything else” includes roots, bark, seeds, flower buds, fruits, and even the stigma of a flower. This means a single plant can give you both an herb and a spice. Cilantro leaves are an herb; the dried seeds of the same plant, sold as coriander, are a spice.
Bark: Cinnamon
Cinnamon is the inner bark of tropical evergreen trees, peeled off and dried into the curled sticks you see in stores. There are two main types. Ceylon cinnamon, sometimes called “true cinnamon,” comes primarily from Sri Lanka. Workers peel thin, delicate layers of inner bark that dry into light-colored, tightly rolled quills. Cassia cinnamon, grown mainly in China and Indonesia, produces thicker, darker, coarser bark that’s harder to process but significantly cheaper. Both types are harvested roughly twice a year in warm, rainy climates.
Fruits and Seeds: Pepper, Nutmeg, and Cumin
Black pepper, the most traded spice in history, is the dried fruit of a tropical vine. The small round fruits grow in clusters called spikes, and harvesters pick them just as the first fruits at the base start turning red but before they fully ripen. The unripe green fruits are briefly cooked in hot water, then sun-dried for several days. During drying, the skin shrinks and darkens into the wrinkled black layer you recognize as a peppercorn.
The same vine produces white and green peppercorns depending on when and how the fruit is processed. White pepper comes from fully ripe red berries soaked in water for about a week until the outer flesh softens and can be rubbed away, leaving just the pale inner seed. Green peppercorns are unripe fruits preserved by freeze-drying, canning, or brining so they keep their color instead of darkening.
Nutmeg is the seed inside a peach-like tropical fruit. When the fruit splits open, it reveals the seed wrapped in a bright red, lacy covering. That red web is dried and sold as mace, a separate spice with a slightly different flavor. So one fruit from the nutmeg tree produces two distinct spices. Cumin, meanwhile, comes from the small dried seeds of a flowering plant in the parsley family.
Underground Stems: Ginger and Turmeric
Ginger and turmeric aren’t technically roots, though they look like them. They’re rhizomes: thick, knobby stems that grow horizontally underground. Both plants thrive in tropical heat and moisture. Ginger can be harvested in four to six months after planting, while turmeric takes longer, typically eight to ten months. Once dug up, turmeric rhizomes are boiled, dried, and ground into the vivid yellow-orange powder used in curries and golden milk. Ginger is sold fresh, dried, or powdered.
Flower Buds: Cloves
Cloves are the unopened flower buds of a tropical evergreen tree. Timing the harvest is critical: the buds must be picked when they shift from green to a slightly pink color, before they actually bloom. At that point, each bud is less than two centimeters long. Harvesters pick the buds by hand, then dry them until they turn the hard, dark brown nails you find in spice jars. From the appearance of buds to harvest takes about four to six months.
The Most Labor-Intensive Spices
Saffron is the world’s most expensive spice by weight because of the staggering amount of hand labor involved. Each saffron crocus flower produces just three tiny red stigmas (the thread-like structures inside the bloom), and those must be picked by hand. A single flower yields roughly 0.006 grams of dried saffron. That means you need about 167 flowers to get one gram, or around 75,000 flowers for a single pound. The flowers bloom for only a few weeks each autumn, and the stigmas must be harvested quickly before they degrade.
Vanilla is a close runner-up for labor intensity. It comes from the unripe fruit (commonly called a “bean” or “pod”) of a tropical orchid. In most growing regions, the flowers must be hand-pollinated because the specific stingless bees that naturally pollinate vanilla orchids don’t exist outside parts of Mexico and Central America. Each flower opens for just one day. Miss that window and the flower drops off without ever producing a bean. After successful pollination, the bean grows on the vine for six to nine months before it’s ready to pick. Then begins a curing process that takes months more: the beans are dried, then placed in semi-shade each morning and wrapped up again each evening for six to eight weeks, followed by a final conditioning stage inside sealed boxes for about three months. From flower to finished vanilla bean can take well over a year.
Where Spices Are Grown and Traded
Most spices need tropical or subtropical climates with consistent warmth and rainfall, which concentrates production in a belt around the equator. China is the world’s largest spice exporter, shipping roughly $787 million worth in 2024, about 21% of the global total. India follows closely at $702 million (18.5%) and dominates the turmeric trade specifically. Together, those two countries account for nearly 40% of all spice exports.
After that, the list gets more surprising. The Netherlands ranks third at $271 million, not because tulip fields secretly grow cumin, but because Dutch ports like Rotterdam serve as massive re-export hubs where spices arrive in bulk from producing countries, get processed or repackaged, and ship onward to the rest of Europe. Turkey ($179 million) and Germany ($146 million) round out the top five, with Turkey growing significant quantities of cumin, sumac, and red pepper flakes, and Germany functioning as another processing and distribution center.
Specific spices are tightly linked to specific regions. Sri Lanka remains the heartland of Ceylon cinnamon. Indonesia and China dominate cassia cinnamon production. Vietnam and India are the top sources of black pepper. Madagascar, along with a few other Indian Ocean islands, produces the majority of the world’s vanilla. Iran and Spain have historically led saffron production, though Afghanistan and Kashmir are also significant growers. Indonesia’s Maluku Islands, once known as the Spice Islands, are still a major source of cloves and nutmeg.
From Plant to Your Kitchen
Nearly every spice goes through some version of the same basic sequence: harvest at a precise stage of maturity, then dry or cure to concentrate flavor and prevent spoilage. The specifics vary enormously. Peppercorns need a few days of sun-drying. Vanilla needs months of careful sweating and conditioning. Saffron threads are dried quickly at low heat to preserve their color and aroma. Cinnamon bark is peeled and air-dried until it curls into quills.
Once dried, whole spices retain their flavor far longer than ground versions. A whole peppercorn or cinnamon stick can stay potent for years in a cool, dark place, while pre-ground spices lose much of their punch within months as the volatile oils that carry their flavor evaporate. This is why many cooks prefer to buy whole spices and grind them as needed, and why the spice trade has historically favored shipping whole dried product over long distances.