When should I sow Cosmos seeds?

Start indoors 4-6 weeks before your last frost (Marc-April) at 18-20 degrees, or direct sow once soil warms in May. Succession sow until early July for continuous colour.

Do Cosmos need staking?

Most reach 80-100cm and stand on their own if punched; in windy gardens , add pea sticks or a low stretch of mesh when you transplant.

Are these sold as plants or seeds?

Herboo sells seeds only. Each packet contains fresh seeds plus full sowing and care instructions so you can raise your own plants.

Are Cosmos good for cutting and pollinators?

Yes-open centres feed bees and hoverflies, and long stems cut best when the first petals unfurl. Sear stems for 10 seconds to extend vase life.

A drift of pink and white 'Sensation' cosmos in flower.

Seed Packets

Raise our seed packets at home and fill beds with clouds of pollinator-loved blooms.Cosmos Seeds for Airy Summer Colour

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Cosmos Flower Seeds

Cosmos are the easiest way to fill beds and pots with meadow-soft colour from June through the first frosts. Every packet we sell comes with full sowing, pinching and cutting guidances so you raise plants from seed. Pick a palette below - each variety includes seeds, detailed care notes, and planting information that show when to sow, plant out and harvest stems.

Cosmos Plant Care

Compare varieties

Apricot Cosmos bipinnatus ‘Apricotta’ flowers in bloom – pollinator-friendly cut flower cosmos

Best for Cut Flowers

Cosmos 'Apricotta' Seeds

Soft apricot-peach blooms on long, elegant stems. Ideal for romantic cutting gardens.

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Cosmos bipinnatus ‘Fizzy Pink’ flowers in bloom – pale pink cut flower cosmos attracting pollinators

Best for Small Gardens

Cosmos 'Fizzy Pink' Seeds

Compact habit, flowers freely, perfect for tighter spaces and borders.

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Cosmos Rubenza flowers with rich velvety red petals fading to warm rose pink in summer border

Best for Pots & Containers

Cosmos 'Rubenza' Seeds

Slightly shorter growth with rich red blooms – excellent in large containers.

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Close-up of Cosmos bipinnatus ‘Sensation’ flowers unfurling, highlighting petal texture and vibrant summer colour.

Best for Height & Impact

Cosmos 'Sensation' Seeds

Classic tall cottage-garden cosmos, ideal for dramatic summer displays.

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Or compare all varieties in detail ↓

	Cosmos 'Apricotta' Seeds	Cosmos 'Purity White' Seeds	Cosmos 'Sea Shells Mixed' Seeds	Cosmos 'Sensation' Seeds	Cosmos 'Fizzy Pink' Seeds	Cosmos 'Rubenza' Seeds
Colour	Apricot	White	Pink	Pink	Pink	Red
Height	0.9m	0.9m	1m	0.9m	0.9m	0.75m
Best for	Cut Flowers, Pollinator-Friendly	Cut Flowers, Pollinator-Friendly	Cut Flowers, Pollinator-Friendly	Cut Flowers, Pollinator-Friendly	Cut Flowers, Pollinator-Friendly	Cut Flowers, Pollinator-Friendly
Key benefits	Cut FlowersPollinator-FriendlyCompact for PotsLow Maintenance	Cut FlowersPollinator-FriendlyCompact for PotsLow Maintenance	Cut FlowersPollinator-FriendlyCompact for PotsLow Maintenance	Cut FlowersPollinator-FriendlyCompact for PotsLow Maintenance	Cut FlowersPollinator-FriendlyCompact for PotsLow Maintenance	Cut FlowersPollinator-FriendlyCompact for PotsLow Maintenance