Thompson & Morgan Cosmos Psyche White Seed Packet - 75 Seeds
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This guide is for gardeners looking to cultivate beautiful, pure-white Cosmos flowers. With this seed packet, you can enjoy stunning blooms from mid-summer through autumn, adding height and interest to your borders or creating stunning cut flowers. Keep in mind that results may vary depending on growing conditions.
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| Model Part Number | 25863 |
|---|---|
| Brand | Thompson & Morgan |
Extended Product Information
FAQs
How deep should I sow the seeds?
Sow the seeds at a depth of 3mm (1/8").
What is the best type of soil for Cosmos?
Cosmos plants thrive in any moist, well-drained soil.
How much space should I leave between plants?
Space plants 45cm (18") apart.
When should I start the seeds indoors?
Sow seeds indoors from March to May.
Do I need to deadhead the flowers?
Yes, deadheading faded flowers encourages more blooms throughout the summer.
How much sunlight do Cosmos need?
Cosmos need full sun to thrive.
How tall do these plants get?
They can grow up to 100cm tall.
How often should I water the plants?
Water regularly until they are fully established, especially during dry periods.
Troubleshooting
Seedlings are not germinating.
Ensure the soil is kept damp but not wet, and that the temperature is within the recommended range (18-25°C or 64-77°F). Make sure there is adequate light.
Plants are not flowering.
Ensure the plants are in full sun and that they are being watered regularly. Deadhead faded flowers to encourage new blooms.
Plants are leggy.
Ensure plants receive enough sunlight. Pinching out the growing tips can encourage bushier growth.
Pros and Cons
Pros
- Produces beautiful pure-white flowers.
- Offers a long blooming season.
- Adds height and interest to gardens.
- Suitable for use as cut flowers.
- Relatively easy to grow.
Cons
- Results may vary based on growing conditions.
- Requires full sun exposure.
- Requires regular watering once established.
Setup, Compatibility & Care
- Sowing: Sow seeds from March to May at a depth of 3mm (1/8") in good quality seed compost. Cover with a fine sprinkling of vermiculite.
- Germination: Place the seed tray in a propagator at 18-25°C (64-77°F) or inside a polythene bag. Keep the soil damp but not wet. Germination usually takes 7-15 days.
- Transplanting: When seedlings are large enough, transplant into 7cm (3") pots. Grow in cooler conditions until large enough to plant outdoors.
- Acclimatization: Acclimatise plants to outdoor conditions over 7 to 10 days before transplanting.
- Planting: Transplant in full sun, in any moist, well-drained soil, 45cm (18") apart.
- Maintenance: Pinch out growing tips to encourage branching. Water regularly until established. Deadhead faded flowers to encourage more blooms.