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Herboo Cosmos ‘Sensation’ seed packet with illustrated pink and white daisy-like cosmos flowers on a clean background.
Unfolding blooms of Cosmos bipinnatus ‘Sensation’, showing soft pink and white petals with bright yellow centres.
Back of Herboo Cosmos ‘Sensation’ seed packet with printed sowing instructions and product information.
Close-up of Cosmos bipinnatus ‘Sensation’ flowers unfurling, highlighting petal texture and vibrant summer colour.
Side profile of Herboo Cosmos ‘Sensation’ seed packet showing slim packaging edge.

Cosmos 'Sensation' Seeds

Cosmos bipinnatus ‘sensation’

Cosmos ‘Sensation’ (Cosmos bipinnatus) is a classic cottage-garden cut flower with tall stems, feathery foliage and masses of daisy-like blooms in pinks, whites and soft magentas. Flowering from late summer into autumn, it adds height and movement to sunny borders and pots — and it’s one of the easiest cosmos seeds to grow.

Approx 80 seeds

  • Cut Flowers
  • Pollinator-Friendly
  • Compact for Pots
  • Low Maintenance

Cosmos 'Sensation' Seeds – Quick Growing Guide

Raise Cosmos ‘Sensation’ from seed for tall, airy flowers that bloom for months. Perfect for bouquets, garden borders, and pollinator beds. Each packet contains 80 seeds.

How to Sow, Grow and Harvest Cosmos 'Sensation' Seeds

  • Sow:Mar–Jun under cover or in pots; Apr–Jun direct outdoors
  • Germination:7–14 days
  • Grow:Full sun, well-drained soil, thin seedlings to 30cm apart
  • Water:Moderate watering; drought tolerant once established
  • Harvest:Pick flowers as they open for best vase life
  • Best for:Cut flower gardens, borders, large pots, pollinator patches

Grow in Your Garden

Cosmos ‘Sensation’ Seeds – Classic Cosmos bipinnatus for tall, airy cut flowers

Calendar

Cosmos 'Sensation' Seeds planting calendar: Mar–Jun: Sow under cover or in pots • Apr–Jun: Direct sow outdoors • Jun–Oct: Flowers or harvest

Jan
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Sow Under Cover / PotsDirect Sow / OutdoorsFlowers / Harvest

How to Grow

Cosmos 'Sensation' seeds can be sown indoors from March or directly outdoors after the last frost, thriving best in full sun with well-drained soil. Starting them in pots allows for a head start before transplanting to balconies, containers, or garden beds.

  • Sowing

    Sow one seed per hole on firm, damp soil and cover lightly, ensuring they remain in full sun to aid germination. Sow between March and June for optimal results.

  • Growing

    Thin seedlings to 30–40cm apart to support their tall, airy growth and prevent overcrowding, suitable for the recommended 40cm pot size. This spacing encourages strong, upright plants that flourish from June through October.

  • Plant care

    Water regularly during dry spells but avoid overfeeding to prevent excessive leafy growth at the expense of blooms. Pinch out growing tips when plants reach 20–25cm to promote bushier plants and deadhead frequently to encourage continuous flowering into autumn; tall stems may require staking in windy conditions.

About Cosmos 'Sensation'

Easy and rewarding, Cosmos bipinnatus ‘Sensation’ is ideal for borders and large pots, loved by bees and butterflies, and one of the best beginner-friendly cut flowers for long-stemmed summer picking.

  • Cut Flowers
  • Pollinator-Friendly
  • Compact for Pots
  • Low Maintenance

Eventual height & spread

0.45m
0.9m
Plant

History of Cosmos 'Sensation'

The name 'Cosmos' comes from the Greek word for 'ordered universe', inspired by the flower’s perfectly arranged petals. Historically cultivated in Spanish mission gardens, these flowers bring harmony and beauty to your garden.

Other NamesGarden cosmos and Mexican aster.
Pet/Baby SafeNon-toxic

FAQs

Reviews

Showing reviews for Cosmos 'Sensation' Seeds.

5.0
Based on 1 review
100% would recommend this product
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1 review
26 Aug 2026

Can't go wrong with Cosmos

Lovely packet of seeds, bought one for me and one as gift :)

GarethVerified buyer

Elsewhere in the range

Recent reviews of other Herboo seeds. These are not ratings of Cosmos 'Sensation' Seeds.

20 Aug 2026

Good card gifts

Bought a couple of these as card gifts for friends and they loved them

Flavia