Marigold and cosmos, two names with separate histories
The Old Farmer's Almanac pairs marigold with cosmos for October. Several neighboring months also carry two names. Nineteenth-century flower dictionaries provide background for the broader symbolism fashion, but the references examined do not establish that competing dictionaries caused these modern monthly pairings. The documented 1912 US gemstone convention is a different kind of record.
Neither flower's individual history follows simply from its place on a calendar, and both marigold and cosmos turn out to carry a specific twist that a florist's caption tends to leave out. Start with the word "marigold" itself: it was, technically, already taken.
The Aztec name, and an English name borrowed from someone else's flower
In Nahuatl, the flower now sold as October's marigold was called cempoalxóchitl, from cempoal(li), "twenty," and xóchitl, "flower." According to research by scholar Doris Heyden cited by the education group Mexicolore, the plant appears more often than almost any other flower in chronicles of ancient Mexico, was cultivated in home gardens and orchards, and was used in ceremonies and medicine tied to Tlaloc, the rain and agriculture deity. A separate, often-repeated legend, not verified history, credits the flower's color to Tonatiuh, the sun god: two lovers, Xochitl and Huitzilin, climb his mountain to bring an offering; Huitzilin dies in battle; a grieving Xochitl asks to be reunited with him, and Tonatiuh turns her into a golden flower that a hummingbird then opens with a landing.
The English word marigold, meanwhile, had already been attached to a different plant for over a century before Spanish explorers ever reached Mexico. Marigold traces to "marygolde" in late-14th-century English, a contraction of Mary's gold, according to the Online Etymology Dictionary. The story behind that name, recorded by the University of Dayton's Marian research institute, involves medieval Europeans placing bright golden flowers at Virgin Mary shrines and statues when they couldn't afford real gold offerings. The flower in that story was Calendula officinalis, native to southern Europe, not the Mexican plant now assigned to October.
When Spanish colonists in Mexico encountered Tagetes, its bright orange blooms reminded them of Calendula, and they extended the familiar name to the new plant. Tagetes grew easily and caught on fast once it reached England in the late 16th century, popular enough that it eventually eclipsed Calendula in everyday use of the unqualified word "marigold." The original plant needed a qualifier of its own afterward, and still carries one: pot marigold.
Two more borrowed names: French marigold, African marigold
The naming confusion doesn't stop at "marigold." Tagetes patula carries the common name French marigold, and Tagetes erecta carries African marigold, alongside Aztec marigold and Mexican marigold, according to Wikipedia's entries for both species (checked 12 October 2026). Neither plant is native to France or Africa; both trace back to Mexico and Central America, the same region as cempoalxóchitl's Nahuatl origin. The African name is generally traced to the plant's path into wider European cultivation by way of North Africa, not to any wild population growing there.
That leaves the flower carrying four common names, marigold, French marigold, African marigold, and Aztec marigold, and only the last one describes where the plant actually grows wild.
Marigold and Día de los Muertos
The Old Farmer's Almanac reads the marigold as a symbol of stubbornness and determination, with its bright color standing for warmth, passion, and creativity. The flower's best-known modern role goes beyond a florist's color chart: cempasúchil, as it's called in modern Spanish, is a prominent fixture of Día de los Muertos, used to decorate gravesites and build home altars across Mexico and Mexican communities elsewhere. Families commonly describe the flower's strong scent and color as a way of guiding the spirits of the dead back to the offerings left for them, a belief tied to celebration rather than a claim this page can verify.
That modern practice sits on top of the older ceremonial use Heyden's research documents, rather than starting from nothing. The specific belief about guiding spirits is a living cultural tradition, not a documented pre-Hispanic record, and this page treats it as such.
Cosmos: a Spanish botanist's word for cosmic order
Cosmos as a plant genus dates to 1791, established by Spanish botanist Antonio José Cavanilles from specimens collected in Mexico, with Cosmos bipinnatus as the type species. Some florist and gardening sites give 1797 for this naming, but the original publication citation preserved in taxonomic reference databases such as World Flora Online points to 1791. Cavanilles took the name from the Greek kosmos, meaning order, ornament, or the universe, the same root behind the English word cosmos for the study of the universe as an ordered whole.
The name is usually credited to the flower's shape: most cosmos cultivars display eight ray florets, evenly spaced around a central disc in close to perfect radial symmetry, a pattern several botanical references single out as the plant's most identifiable trait. Cosmos, like marigold, is native to Mexico, so October's two birth flowers share a continent of origin even though they entered European garden literature by very different routes: one folk name attached by visual resemblance to an unrelated plant, the other a formal Latin genus name coined outright by a working botanist. The Old Farmer's Almanac reads cosmos as a symbol of order, balance, peace, and innocence, with a secondary association with luck.
If your birthday falls in Libra or Scorpio
October births split across two zodiac signs. In Western tropical astrology, Libra runs from roughly September 23 to October 22, and Scorpio picks up around October 23 and continues to November 21, though as this site's Scorpio dates page documents, that exact boundary shifts by a day depending on the year and which reference is doing the counting. Readers born in the back half of the month can check that page for a closer look at why the line moves.
Readers who came here for a neighboring month can find September's birth flower, aster and morning glory, or November's, chrysanthemum and peony. Readers after October's birthstone instead of its flower can check this site's birthstones by month page. The complete twelve-month flower chart those neighboring months sit inside, checked against Farmers' Almanac's competing version, is laid out on this site's birth flowers by month page.