Cosmos bipinnatus 'Sea Shells'


Reader rating

From 4 ratings

+ Add a review

Key information

Plant type

Hardy annual

Flower colour





Half hardy

Skill level


Cosmos 'Sea Shells'

Plant details

Daisy-like cosmos flowers are easy-to-grow and versatile annuals. They can be used to plug gaps in borders, grown as a feature in their own right or as part of a container display. The flowers attract a variety of bees, butterflies and hoverflies, and also make a good cut flower.

Cosmos 'Sea Shells' has interesting fluted petals, each rolled round a tube, like a sea shell. It makes a great planting partner for dark-flowered dahlias and chrysanthemums, and both its flowers and foliage work well in cut flower arrangements. For best results grow Cosmos 'Sea Shells' in moist but well-drained soil, in full sun. Deadhead spent flowers to encourage repeat-flowering.

Family: Asteraceae

Genus: Cosmos

Species: bipinnatus

Cultivar: Sea Shells

Plant type: Hardy annual

Flower colour: Pink

Foliage colour: Mid-green

Feature: Flowers

Sun exposure: Full sun

Soil: Well-drained/light, Acidic, Chalky/alkaline

Hardiness: Half hardy

Skill level: Experienced

Height: 105cm

Spread: 90cm

Time to plant seeds: March to April

Flowering period: July to October

Reader reviews


This year is my first time at growing Cosmos 'Seashells', the seedlings have so far grown into healthy sturdy young plants, promising lots of radiant blooms.

jean linsley

at what stage do you plant out & they are big enough not to get eaten..I landed up with just one plant this year...

Flower bird

I love Cosmos, I think they are absolutely gorgeous, I grew some last year and wanting to grow a lot more this year.....they are stunning.


I have a Cosmos in a pot,looks healthy but no sign of a flowering bud,can anyone help with this or am I been impatient?

Add your own review

Please register or login to add a review