Thompson & Morgan Cosmos Polidor - 1 Packet (100 Seeds)

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Grow your own bright and cheerful Cosmos flowers from seed! Earlier to bloom than many other Cosmo...

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This guide is for anyone looking to cultivate vibrant Cosmos flowers from seed, offering a cost-effective way to brighten your garden with sunshine shades. While these seeds are earlier to bloom than many other Cosmos varieties, successful cultivation requires attention to sunlight and proper soil conditions. This guide covers everything from sowing to care, ensuring you get the most out of your Cosmos Polidor seeds.

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Model Part Number	23963
Brand	Thompson & Morgan

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FAQs

When should I sow the seeds?

Sow Cosmos seeds from March to May.

How deep should I plant the seeds?

Sow the seeds at a depth of 3mm (1/8").

What kind of soil do Cosmos Polidor plants need?

Plant in any moist, well-drained soil.

How much space should I leave between plants?

Space plants 45cm (18") apart.

Do I need to pinch the plants?

Yes, pinch out the growing tip of each stem when transplanting to encourage branching and more flowers.

How much sun do they need?

Cosmos Polidor needs full sun for optimal growth.

Are the flowers edible?

Yes, the blooms are edible and can be added to salads.

How tall do these plants grow?

They can grow up to 75cm tall when fully established.

Troubleshooting

Seeds not germinating

Ensure the soil is kept damp but not wet, and that the seeds are receiving adequate light and warmth. Check the seed packet for the recommended temperature range.

Poor flowering

Make sure the plants are getting enough sunlight (full sun). Insufficient light can reduce flower production.

Plants are leggy

Provide more sunlight or consider pinching back the stems to encourage bushier growth.

Pests and diseases

Monitor plants for pests and diseases, and take appropriate action. Ensure good air circulation to prevent fungal issues.

Pros and Cons

Pros

Earlier blooming compared to other Cosmos varieties.
The flowers' bright colors add a vibrant touch to any garden.
Edible flowers and leaves provide a culinary bonus.
Easy to grow from seed, suitable for beginners.
The bushy plants create a full and attractive display.

Cons

Requires full sun for optimal growth and flowering.
Susceptible to certain pests and diseases.
Requires proper soil and watering to thrive.
Germination can take 7-15 days, requiring patience.
Results may vary depending on growing conditions.

Setup, Compatibility & Care

Sowing Seeds: Sow Cosmos seeds at a depth of 3mm (1/8") in good-quality seed compost. Cover the seeds with a fine sprinkling of vermiculite.
Propagation: Place the seed tray in a propagator at 18-25C (64-77F) or seal it inside a polythene bag. Keep the soil damp but not wet.
Light and Germination: Do not exclude light, as this aids germination, which usually takes 7-15 days.
Transplanting: When seedlings are large enough to handle, transplant into 7cm (3") pots. Grow them in cooler conditions until large enough to plant outdoors.
Acclimatization: When the plants are well-grown and the risk of frost has passed, acclimatize them to outdoor conditions over 7 to 10 days.
Planting: Transplant outdoors in full sun in any moist, well-drained soil at a distance of 45cm (18") apart.
Pinching: Pinch out the growing tip of each stem when transplanting to encourage stems to branch and produce more flowers.

Compatibility: Cosmos Polidor is compatible with a wide range of plants and can be incorporated into mixed borders and cutting gardens.

Care Instructions: Water regularly, especially during dry periods. Deadhead spent flowers to encourage further blooms. Provide support if necessary, especially in windy locations.