Thompson & Morgan Cosmos Psyche - 1 Packet (100 Seeds)
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Product Information
Full details
The Thompson & Morgan Cosmos Psyche is an ideal choice for gardeners looking for reliable, long-lasting summer color in borders or containers. These semi-double and single blooms offer a charming aesthetic and are perfect for cut flower arrangements, though they require full sun and careful protection from frost to thrive.
All features
| Model Part Number | 24103 |
|---|---|
| Brand | Thompson & Morgan |
Extended Product Information
FAQs
When is the best time to sow Cosmos Psyche seeds?
You should sow the seeds indoors from March through May.
Do I need to stake these plants?
With an upright habit and reaching up to 90cm, they are generally sturdy, but if your area is particularly windy, minimal staking may be beneficial.
Can these be grown in pots?
Yes, they are suitable for summer flowering in pots, provided the container is large enough to support their 60cm spread.
How far apart should I plant them in the garden?
Transplant them into the garden at a distance of 45cm apart.
Are these perennial plants?
Cosmos bipinnatus are typically grown as annuals and will flower through the summer and autumn.
Should I pinch out the growing tips?
Yes, pinching out the growing tip when transplanting encourages the plant to branch out, resulting in more flowers.
Troubleshooting
Seeds failing to germinate
Ensure they are receiving enough light and that the temperature stays within the 18-25C range.
Plants are tall and leggy
Ensure the seedlings are moved to cooler, brighter conditions once they have germinated and remember to pinch out the growing tips.
Poor flowering
Check that the plants are receiving full sun and are not overly crowded.
Pros and Cons
Pros
- Prolonged flowering period into autumn
- Versatile for both ground planting and containers
- Excellent for DIY floral arrangements
- Simple germination process
- Upright growth habit reduces the need for heavy staking
Cons
- Not frost tolerant; requires careful timing for outdoor planting
- Requires full sun exposure for optimal health
- Requires pinching tips to achieve maximum branching
Setup, Compatibility & Care
Start your seeds indoors between March and May using a good quality seed compost. Sow at a depth of 3mm and lightly cover with vermiculite. Maintain a temperature between 18-25C using a propagator or a sealed polythene bag. Ensure the soil remains damp but not saturated, and provide plenty of light, as it is necessary for successful germination. After 7-15 days, monitor for seedlings. Once large enough, transplant into 7cm pots and move to a cooler environment. Always acclimatize your plants over 7-10 days before transplanting into their final outdoor position after the last frost has passed.