In this article
Marigold and cosmos
Popular lists name the marigold (Tagetes or Calendula, depending on the source) and the cosmos for October. These are traditions, not official. Marigolds are dense, golden-orange blooms with a distinctive scent. Cosmos are tall, feathery plants with simple daisy-like flowers in pink, white and magenta, and they often bloom until frost.
What they are associated with
- Marigold: warmth, perseverance and, in some traditions, remembrance. In Mexico, cempasúchil marigolds decorate altars for Día de Muertos.
- Cosmos: order and harmony, since the Greek word kosmos means an ordered world.
- Flower-language books vary, so treat these as typical ties.
Growing them
Both are easy from seed sown after frost, in full sun and ordinary soil. Marigolds work well beside vegetables, where some gardeners plant them hoping to deter pests, though results are mixed. Cosmos do best in poor soil; rich soil gives lots of leaves and few blooms. Deadhead both to extend flowering, and save seed from spent heads for next year.
Gift ideas for October birthdays
A pot of marigolds or a loose bouquet of cosmos is a bright, inexpensive gift. Marigold orange and cosmos pink both echo the shifting fire of an opal, October’s traditional birthstone, so a bouquet next to opal jewelry looks cohesive.
Safety note
Marigolds can irritate the skin of some people and are mildly upsetting to pets if chewed. Pot marigold (Calendula) is sold as an edible in some places, but do not eat any flower unless it was sold as food. Cosmos are generally mild.
Zodiac connection
October birthdays are Libra until about October 22 and Scorpio after that. There is no official pairing, but the balanced cosmos is often matched with Libra and the deep-colored marigold with Scorpio in casual lists.
Questions people ask
What is the October birth flower?
The marigold and the cosmos are the two most often listed for October.
Why are marigolds used for Día de Muertos?
In Mexican tradition, the bright cempasúchil is used on altars and paths to honor the dead.
Do cosmos need rich soil?
No. They flower best in lean soil with plenty of sun.