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Cosmos bipinnatus 'Sweet Sixteen' Seeds Half-Hardy Annual Flowering Garden Plants Easy to Grow Your Own 1 Packet of 70 Seeds by Thompson and Morgan — image 1
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Cosmos bipinnatus 'Sweet Sixteen' Seeds Half-Hardy Annual Flowering Garden Plants Easy to Grow Your Own 1 Packet of 70 Seeds by Thompson and Morgan

$23.99
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About this item
  • Soft pink petals, complimented by a beautiful dark pink picotee edge!
  • Loved by the pollinating insects!
  • Mesmerising displays from July to October.
  • Half-hardy annual Cosmos seeds; supplied as 1 packet of 70 seeds.
Product description

Cosmos ‘Sweet Sixteen’ is really the perfect addition to your cottage garden and wildlife areas, as not only are they beautifully tall; they are loved by the pollinating insects! You can expect spectacular bursts of pink blooms from July to October! This wonderful variety of cosmos can also be used for indoor cut flower displays! Sow Cosmos seed from March to May at a depth of 3mm (1/8") in a good quality seed com-post, 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") potsand 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. When growing Cosmos plants, water regularly until they are fully established. Deadhead faded Cosmos flowers regularly to encourage more blooms to be produced throughout the summer. Product Specifications: Position: Full sun, sun or semi shade Height: Up to 90cm (35.4in) when fully established Spread: Up to 50cm (19.7in) when fully established Supplied as 1 packet of 70 seeds 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).

Product details
Brand
Thompson & Morgan
Manufacturer
THOMPSON & MORGAN
Colour
Pink
Size
70 seeds
EAN
5057554107902

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10 Trustpilot reviews total, with 2 shown at a time.

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Sigalit
🇮🇱 · January 2026

I wrote to Bigamart's customer support and they accompanied the process of reshipping the item until it finally arrived. I felt a genuine effort to solve the problem till it was finally solved.

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Verified buyer
🇦🇺 · November 2025

The package was here in Australia from England in a few days — so quick! Something was missing and they refunded it straight away. Pretty happy with these guys.

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