Cosmos Seashells Mixed Seeds

A whimsical annual with fluted, shell like petals in soft shades of pink, white, and crimson ideal for cottage gardens, pollinator borders, and cutting displays.

 

Cosmos Seashells Mixed is a half-hardy annual celebrated for its distinctive tubular petals that curl into trumpet like flutes, creating a textured, playful effect across the garden.

 

The blooms rise above fine, ferny foliage and flower freely from midsummer to autumn. This heirloom variety adds height and movement to borders, while its nectar rich flowers attract bees, butterflies, and hoverflies.

 

Easy to grow and drought tolerant once established, it performs beautifully in containers, wildflower plantings, and informal schemes.

 

Seed Qty: Approx. 60

 

Sow: February – April (indoors) or May (direct)

Germination: 7 – 14 days at 15–18°C

Soil: Well-drained; loam, chalk, or sandy; neutral to slightly alkaline

Height: 80 – 120 cm

Flowers: July – October

Good Companions: Cornflower, scabious, cosmos ‘Purity’

Avoid Pairing With: Shade-loving or moisture-demanding plants

 

 

Sow indoors from February to April in trays or modules, covering seeds lightly with 5 mm of compost or vermiculite. Maintain 15–18°C and keep moist until germination (7–14 days). Transplant seedlings when large enough to handle, spacing 30–40 cm apart. Harden off before planting outdoors after the last frost.

 

Alternatively, direct sow outdoors in May once soil has warmed. Deadhead regularly to prolong flowering and harvest stems when buds are just opening for arrangements.