October Birth Flowers: Cosmos and Marigold Guide

By Nina Walsh · October 6, 2026

Cosmos: The October Star

Cosmos bipinnatus, Octobers primary birth flower, symbolizes order, peace, and modesty. Native to Mexico, these daisy-like flowers bloom in pink, white, and magenta from summer through frost.

Marigold: The Golden Companion

Tagetes (marigold) represents creativity, passion, and warmth. Available in orange, yellow, and mahogany, marigolds are among the longest-blooming annuals.

Growing Cosmos

Direct sow after last frost, or start indoors 4-6 weeks early
Full sun, well-drained soil (avoid rich soil — promotes foliage over flowers)
Height: 1-6 feet depending on variety
Deadhead for continuous bloom until frost

Growing Marigolds

Direct sow after soil warms or transplant. Full sun, average soil. Pinch for bushiness. African marigolds have large pom-pom blooms; French marigolds are compact and prolific.