Thompson & Morgan Cosmos Seashells 1 Packet (100 Seeds), Purple
by Thompson & Morgan

Product Details
- Brand
- Thompson & Morgan
- Colour
- Purple
- Condition
- new
- Model
- 23800
- GTIN
- 05057554119530
- Category
- Flowers
£2.99
Available at Robert Dyas
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Thompson & Morgan Cosmos Seashells 1 Packet (100 Seeds), Purple by Thompson & Morgan is available for £2.99 at Robert Dyas. Prices last checked on 25 February 2026.
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Description
Cosmos ‘Sea Shells’ fabulous, fluted pink petals reminiscent of sea shells, surrounding a button-like centre and complemented by finely cut, ferny foliage. Daisy-like cosmos flowers are easy to grow and versatile annuals, ideal for borders and container displays, where their flowers attract a variety of bees, butterflies and hoverflies. Deadhead spent flowers to encourage repeat-flowering. Both the flowers and foliage work well in cut flower arrangements for the home. Sow Cosmos seed from March to May at a depth of 3mm (1/8") in a good quality seed compost and cover the seeds with a very fine sprinkling of vermiculite. Place the seed tray in a propagator at a temperature of 18-25C (64-77F) or seal it inside a polythene bag. Keep the soil damp but not wet. Do not exclude light as this aids germination which usually takes 7-15 days. When seedlings are large enough to handle, transplant into 7cm (3") pots and grow them on in cooler conditions until large enough to plant outdoors. When Cosmos plants are well grown and all risk of frost has passed, acclimatise them to outdoor conditions over 7 to 10 days. Transplant outdoors in full sun in any moist, well-drained soil at a distance of 45cm (18") apart. Pinch out the growing tip of each stem when transplanting to encourage stems to branch and produce more Cosmos flowers. Product specifications: Position: Full Sun Height: Up to 100cm when fully established Spread: Up to 60cm when fully established Supplied as 1x packet Cosmos bipinnatus 'Sea Shells' (approx. 100 seeds) Flowering period: July to October Delivered with growing and care instructions Images shown are for guidance only of the expected results from plants upon maturity. Different growing conditions might vary results. Image may be included for illustration of supply but can vary due to seasonality changes (e.g. deciduous plants lose leaves in colder months). Features: Cosmos ‘Sea Shells’ fabulous, fluted pink petals reminiscent of sea shells, surrounding a button-like centre and complemented by finely cut, ferny foliage Daisy-like Cosmos flowers are easy to grow and versatile annuals, ideal for borders and container displays, where their flowers attract a variety of bees, butterflies and hoverflies Both the flowers and foliage work well in cut flower arrangements for the home Supplied as 1x packet Cosmos bipinnatus 'Sea Shells' (approx. 100 seeds) Supplied with T&M's very own cultural instructions on how to care for your seeds Specifications: Model Number: 23800
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- Thompson & Morgan Cosmos Seashells 1 Packet (100 Seeds), Purple by Thompson & Morgan is available for £2.99 at Robert Dyas. Price checked and updated daily.
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