Thompson & Morgan Cornflower Polka Dot Mixed - 1 Packet (500 Seeds)
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Full details
This guide is for gardeners looking to add vibrant, mixed cornflower colors to their summer borders and attract beneficial pollinators. The key benefit is the easy-to-grow nature of these hardy annuals, providing delicate cut flowers and a nectar-rich habitat for bees and butterflies. A caveat is the need for specific sowing conditions and thinning for optimal growth. This product offers 500 seeds of 'Polka Dot Mixed' cornflowers, known for their stunning blend of colors, suitability for full sun, and potential for both outdoor and indoor cultivation.
All features
| Model Part Number | 23809 |
|---|---|
| Brand | Thompson & Morgan |
Extended Product Information
FAQs
What is the best time to sow cornflower seeds outdoors?
Sow cornflower seeds outdoors where they are to grow from March to April.
How deep should I sow the cornflower seeds?
Sow seeds thinly at a depth of 3mm (1/8").
How far apart should I thin the cornflower seedlings?
When seedlings are large enough to handle, thin them out to 15cm (6") apart.
Can I grow these cornflowers indoors?
Yes, you can grow cornflowers indoors from August to September for early summer flowering the following year. Sow them on the surface of seed compost at 18-23°C and ensure they receive light.
What are the mature dimensions of the cornflower plants?
These cornflowers typically reach a height of up to 45cm (18in) and spread up to 30cm (12in).
Are these cornflowers suitable for attracting wildlife?
Yes, their nectar-rich blooms are attractive to bees and butterflies.
What type of conditions do cornflowers prefer?
Cornflowers prefer a position in full sun on well-drained soil.
What is included in the packet?
The packet contains approximately 500 seeds of Thompson & Morgan Cornflower Polka Dot Mixed.
Troubleshooting
Seeds are not germinating
Ensure seeds are sown at the correct depth (3mm or 1/8") and kept consistently moist. Check that the temperature is within the recommended range for indoor sowing (18-23°C) or that outdoor conditions are suitable. Seeds may also be past their viable date.
Seedlings are weak or leggy
This can be caused by insufficient light. Ensure plants are in a full sun position outdoors, or provide adequate light for indoor-started seedlings. Thinning the seedlings appropriately also helps prevent overcrowding and weak growth.
Plants are not flowering
Ensure the plants are receiving adequate sunlight. Poor soil drainage can also inhibit flowering. Check that the plants have been thinned correctly and are not overcrowded.
Pests on seedlings or plants
Monitor regularly for common garden pests. Handpick larger pests or use appropriate organic pest control methods if necessary. Ensure good air circulation around plants.
Pros and Cons
Pros
- Adds a splash of color to summer gardens.
- Supports local ecosystems by attracting bees and butterflies.
- Easy to grow from seed, suitable for novice gardeners.
- Flowers can be used for attractive cut flower arrangements.
- Versatile enough for both direct sowing and indoor starting.
Cons
- Requires full sun and well-drained soil for best results.
- Needs thinning after germination to prevent overcrowding.
- Indoor-started plants require overwintering in frost-free conditions.
- Hardy annuals, meaning they typically complete their life cycle in one season.
Setup, Compatibility & Care
Outdoor Sowing:
- Choose a sunny position with well-drained soil.
- Prepare the soil by raking it to a fine tilth.
- Sow seeds thinly outdoors from March to April in drills spaced 30cm (12") apart.
- Sow seeds at a depth of 3mm (1/8").
- Water the ground regularly, especially during dry periods.
- Once seedlings are large enough to handle, thin them to 15cm (6") apart.
Indoor Sowing (for early flowering):
- Sow seeds on the surface of a good quality seed compost in pots or trays.
- Maintain a temperature of 18-23°C (65-73°F).
- Cover seeds with a very fine sprinkling of compost or vermiculite; do not exclude light.
- When seedlings are large enough to handle, transplant them.
- Grow them on in cooler conditions until large enough to move outdoors.
- Overwinter plants in cool, light, frost-free conditions before planting out the following spring or growing as greenhouse pot plants.
Compatibility:
- Position: Full Sun.
- Soil: Well-drained.
Care:
- Water regularly, especially during dry spells.
- Thin seedlings to ensure proper growth.
- Protect overwintered plants from frost.