Cosmos sulphureus 'Brightness Mix' Seeds

A Blazing Mix of Summer Colour

Cosmos sulphureus 'Brightness Mix' is a joyful, fiery blend of double and semi-double blooms in rich crimson red, glowing orange, golden yellow, and soft cream. Held on slender, well-branched stems above bushy, compact plants with the characteristic deeply cut foliage of the sulphureus species, this mix brings a warm, exuberant energy to the garden from summer right through to autumn. Whether planted en masse in a border, tucked into a cottage garden edge, or cut for a vase, the Brightness Mix is a season-long celebration of colour that bees and butterflies adore.

Why Gardeners Love It

• 🌈 Vibrant mix of double blooms — rich reds, oranges, yellows, and cream in one packet
• 🌼 Bushy, compact habit — naturally tidy and well-branched, great for borders and containers
• ✂️ Excellent cut flower — stunning in warm-toned summer arrangements, long-lasting in the vase
• 🐝 Outstanding for pollinators — a magnet for bees and butterflies throughout the season
• 🌱 Easy to grow from seed — fast-growing, heat-tolerant, and free-flowering in warm conditions

Growing Tips for New Zealand

Cosmos sulphureus loves warmth and performs best in full sun with well-drained soil. Sow seeds directly in spring once soil has warmed, or start indoors 3–4 weeks before transplanting. Sow on the surface of moist seed-raising mix and cover lightly. Space plants 25–30 cm apart. Sulphureus types thrive in drier conditions and are more heat-tolerant than bipinnatus — avoid overwatering. Deadhead regularly to keep plants flowering prolifically from summer through to autumn. Performs beautifully throughout NZ in warm, sunny positions.

What's in the Packet

Each packet contains 10 seeds of Cosmos sulphureus 'Brightness Mix'.