Cosmos Klondyke Mixed Seeds

Cosmos Klondyke Mixed – Cosmos sulphureus

A fiery annual with daisy-like blooms in golden yellow, orange, and scarlet — perfect for borders, wildlife gardens, and cut flowers.

Cosmos Klondyke Mixed is a half-hardy annual that produces masses of bright, semi-double flowers above finely divided, fern-like foliage. Its warm, sunset shades bring a bold splash of colour to summer displays, while its nectar-rich blooms attract bees, butterflies, and other pollinators. Heat- and drought-tolerant once established, this variety thrives in poor soils and sunny positions, making it a low-maintenance choice for naturalistic planting schemes, wildflower meadows, and cottage gardens. Long stems also make it excellent for cutting.

 

Seed Qty: Approx. 60

 

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

Germination: 7 – 21 days at 15–20°C

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

Height: 75 – 100 cm

Flowers: June – October

Companion Plants: Zinnia, calendula, rudbeckia

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

Growing Notes

Sow indoors from February to May in trays or pots of moist compost, covering lightly. Maintain 15–20°C for germination. Transplant seedlings when large enough to handle, spacing 30–40 cm apart. Harden off before planting outdoors after the last frost. Alternatively, sow directly outdoors from April to June in prepared soil. Deadhead regularly to prolong flowering. Plants are drought-tolerant once established and thrive in full sun.