Thompson & Morgan Geranium Border Supreme - Pink
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B&QB&Q - Geranium Border Supreme F2 Hybrid 1Seed Packet (18 Seeds)
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This guide is for gardeners looking to add vibrant, free-flowering color to their beds, borders, and hanging baskets. The Geranium 'Border Supreme' offers large blooms in a stunning mix of reds, roses, pinks, salmon, and white, providing a long-lasting display. While beautiful, these are half-hardy plants that require overwintering in frost-free conditions to survive colder months.
All features
| Model Part Number | 23861 |
|---|---|
| Brand | Thompson & Morgan |
Extended Product Information
FAQs
What is the best position for Geranium Border Supreme?
This variety thrives in full sun. A sunny spot will encourage the most abundant flowering.
Can I grow these in hanging baskets?
Yes, Geranium 'Border Supreme' is ideal for hanging baskets due to its free-flowering nature and attractive growth habit.
How often should I water them?
Water regularly, especially during warm weather and when plants are in containers. Allow the soil to dry slightly between waterings to prevent waterlogging.
When is the best time to sow the seeds?
The optimal sowing time is from mid-January to mid-March.
What soil conditions do they prefer?
They prefer a rich, light, well-drained soil.
How do I prepare them for winter?
As they are half-hardy, move them to a frost-free greenhouse or a cool, bright indoor location before the first frost. Reduce watering during this period.
How many seeds are in a packet?
Each packet contains approximately 18 seeds of Geranium 'Border Supreme' F2 Hybrid.
Troubleshooting
Seeds are not germinating
Ensure consistent temperature (20-25°C) and humidity. Check sowing depth is correct and compost is kept moist but not waterlogged. Patience may be required as germination can take up to 21 days.
Plants are leggy and weak
Plants may not be receiving enough light. Ensure they are in a position of full sun. Provide adequate spacing to prevent overcrowding, which can lead to weak growth.
Poor flowering
Ensure the plant is in full sun and has adequate water and nutrients. Deadheading spent blooms will encourage more flowers.
Plants dying in winter
These are half-hardy and require protection from frost. Move plants to a frost-free greenhouse or suitable indoor location before temperatures drop.
Yellowing leaves
This can indicate overwatering or poor drainage. Ensure the soil is well-drained and allow the soil to dry slightly between waterings.
Pros and Cons
Pros
- Abundant and large flowers with a beautiful color range.
- Suitable for multiple garden uses, including hanging baskets.
- Can be overwintered for continued enjoyment in subsequent years.
- Provides a long blooming season.
- Relatively easy to grow in the right conditions.
Cons
- Requires overwintering in a frost-free location.
- Needs full sun for best flowering performance.
- Sowing requires specific temperature and humidity conditions (propagator recommended).
- Germination can be slow and variable (3-21 days).
- Soil needs to be rich, light, and well-drained.
Setup, Compatibility & Care
Sowing:
- Sow seeds in trays or pots filled with good seed compost.
- Maintain an optimum temperature of 70-75°F (20-25°C) using a propagator or warm place.
- Sow at a depth of 1/16in (1.5mm).
- Keep soil temperature steady, both day and night, for best germination.
- Germination typically takes 3-21 days.
Transplanting & Planting Out:
- Transplant seedlings once they are large enough to handle.
- Harden off plants gradually before planting outdoors.
- Plant out after all risk of frost has passed.
- Space plants 30cm (12in) apart.
- Ensure planting location is in full sun.
- Prefers a rich, light, well-drained soil.
Care:
- Water regularly, especially during dry periods, but avoid waterlogging.
- Deadhead spent flowers to encourage further blooming.
- Overwintering: As these are half-hardy, move plants to a frost-free greenhouse or cool, bright indoor location before the first frost. Reduce watering during winter.
- Repot in spring and gradually reintroduce to outdoor conditions.