Cosmos are the picture of effortless charm — simple, daisy-like flowers dancing on tall, feathery stems. Easy to grow and beloved by pollinators, they bring an airy, meadow-like softness to the summer and autumn garden.

Cosmos at a glance

• Botanical name: Cosmos bipinnatus
• Family: Asteraceae
• Bloom season: summer to autumn
• Symbolism: order, harmony, and peace

About the cosmos

Cosmos grow quickly from seed and bloom for months in shades of pink, white, crimson, and (in a different species) golden orange. Their name comes from the Greek for “order” and “harmony,” a nod to their neatly arranged petals. They thrive on neglect, flowering best in poor soil.

Cosmos meaning and symbolism

The cosmos symbolizes order, harmony, peace, and wholeness. It’s a secondary birth flower for October, alongside the marigold.

Types of cosmos

Popular varieties worth knowing:

• Cosmos bipinnatus — the classic pink-and-white garden cosmos
• Cosmos sulphureus — golden-orange and red types
• ‘Sensation’ & ‘Sonata’ — tall and dwarf garden series
• Double & ‘Seashell’ — frilled and fluted petal forms

How to grow and care for cosmos

A few essentials keep this flower thriving:

• Sow seeds directly after the last frost in full sun
• Grow in average to poor, well-drained soil — rich soil means fewer flowers
• Water sparingly once established
• Deadhead to prolong blooming
• Let some flowers set seed and they’ll often self-sow

Cosmos FAQs

When do cosmos bloom?

Cosmos bloom from summer into autumn, often flowering just seven to ten weeks after sowing and continuing until the first frost.

Are cosmos annuals?

The most common garden cosmos are annuals, growing, flowering, and setting seed in a single season, though they frequently self-seed and return.

Do cosmos reseed themselves?

Yes. If you leave some spent flowers to set seed, cosmos readily self-sow and often reappear in the same spot the following year.

Explore more

Browse more flower profiles, learn about flower meanings, or find your birth flower.