Coreopsis Seeds 'Double The Sun' - Unwins
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This guide is for gardeners seeking a low-maintenance, vibrant perennial for containers or borders. The 'Double the Sun' Coreopsis offers a continuous display of golden-yellow, semi-double daisy-like flowers throughout summer, attracting pollinators. A potential caveat is the need for regular deadheading to maximize bloom duration.
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| Model Part Number | 30211026 |
|---|---|
| Brand | Unwins |
Extended Product Information
FAQs
When is the best time to sow Coreopsis 'Double the Sun' seeds?
Sow indoors in late winter or early spring, about 6-8 weeks before the last expected frost. You can also sow directly outdoors in spring after the danger of frost has passed.
How often should I deadhead the flowers?
Deadhead regularly, ideally once or twice a week, by snipping off the spent blooms. This encourages the plant to produce more flowers rather than setting seed.
Can this plant tolerate drought once established?
While Coreopsis is relatively drought-tolerant once established, it performs best with consistent moisture, especially during prolonged dry spells or hot weather.
What is the mature size of 'Double the Sun' Coreopsis?
This variety forms a compact mound, typically reaching about 30-45cm in height and spread, making it suitable for smaller spaces and containers.
Are these seeds suitable for a wildflower garden?
Yes, Coreopsis is a lovely addition to wildflower gardens, especially due to its pollinator-friendly nature and long blooming period. Ensure adequate spacing.
Can I grow Coreopsis 'Double the Sun' in a shady spot?
Coreopsis thrives best in full sun. While it may tolerate partial shade, flowering will be significantly reduced, and the plant may become leggy.
Troubleshooting
Seeds not germinating
Ensure consistent temperature (20-25°C) and adequate moisture. Check that seeds are not buried too deeply and that light is not excluded.
Weak or leggy seedlings
Provide adequate light, especially after germination. Ensure seedlings are not overcrowded and have good air circulation.
Lack of flowers
Ensure the plant is receiving adequate sunlight (full sun is best). Regular deadheading of spent blooms will encourage more flowers.
Plants wilting
Check soil moisture; wilting can indicate underwatering. Ensure good drainage to prevent root rot in very wet conditions.
Pros and Cons
Pros
- Continuous summer bloom provides long-lasting color.
- Attracts beneficial pollinators like bees and butterflies.
- Compact size makes it suitable for containers and small gardens.
- Low maintenance, requiring little more than sunlight and well-drained soil.
- Flowers are excellent for cutting and indoor arrangements.
Cons
- Requires regular deadheading to encourage further blooming.
- Germination can take several weeks.
- Needs consistent moisture during establishment and dry spells.
- Best performance is in full sun, limiting placement options.
Setup, Compatibility & Care
Sowing Indoors:
- Sow seeds in trays filled with pre-watered seed compost.
- Cover seeds lightly with soil or vermiculite. Do not exclude light.
- Maintain a temperature of 20-25°C.
- Germination typically occurs within 3-4 weeks.
Growing On:
- Once seedlings are large enough to handle, transplant them into trays of potting compost, spacing them about 5cm apart.
- Alternatively, sow individually into 8cm pots.
- Gradually acclimatize seedlings to outdoor conditions over 2-3 weeks before planting out.
Planting Out:
- Plant outdoors after the danger of frost has passed.
- Space plants approximately 35cm apart.
Compatibility & Conditions:
- Sunlight: Thrives best in full sun (at least 6 hours of direct sunlight daily).
- Soil: Prefers any well-drained soil in the garden.
- Containers: Use a good quality potting compost for container planting.
Care:
- Watering: Keep soil consistently moist during establishment and dry periods.
- Deadheading: Regularly remove spent flowers to encourage continuous blooming and prolong the flowering season.