Penstemon Heterophyllus True Blue - 40 Seeds - Thompson & Morgan
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This guide is for gardeners who want to cultivate the vibrant Penstemon heterophyllus 'True Blue'. It offers striking blue blooms and is suitable for various settings like borders and containers. A key benefit is the possibility of flowering in the first year. However, results may vary depending on growing conditions and seasonality.
All features
| Model Part Number | 24270 |
|---|---|
| Brand | Thompson & Morgan |
Extended Product Information
FAQs
When is the best time to sow Penstemon 'True Blue' seeds?
Sow seeds from February to early June.
What temperature is ideal for seed germination?
Maintain a temperature of 15-18C (60-65F).
How long does it take for the seeds to germinate?
Germination typically takes 14-30 days.
Where should I plant the Penstemon 'True Blue'?
Plant in a location with full sun and well-drained soil.
How far apart should I space the plants?
Space plants 30cm (12in) apart.
How do I encourage perennial growth?
Cut the stems back to ground level in autumn and apply a thick mulch.
Can I grow Penstemon 'True Blue' in containers?
Yes, it is suitable for patio containers.
What is the expected height and spread of the plant?
The plant can reach a height and spread of up to 45cm.
Troubleshooting
Seeds not germinating
Ensure correct temperature (15-18C / 60-65F), sufficient light, and moisture. Check seed viability.
Poor growth or stunted plants
Check soil drainage; ensure the plants get enough sunlight; and provide adequate nutrients.
Lack of flowering
Ensure plants receive full sun. Cut back stems in autumn to promote new growth and flowering.
Pros and Cons
Pros
- Vibrant, eye-catching blue flowers.
- Adaptable to various garden settings.
- Potential for first-year blooms.
- Detailed growing instructions provided.
Cons
- Results can vary based on growing conditions.
- Requires specific temperature for germination.
- Needs well-drained soil and full sun.
Setup, Compatibility & Care
- Sowing Seeds: Sow seeds from February to early June on the surface of good seed compost, lightly covering them. Maintain a temperature of 15-18C (60-65F) for germination, which takes 14-30 days.
- Light and Moisture: Ensure seeds have access to light. Sealing sown containers in a polythene bag can aid germination.
- Transplanting: Once seedlings are large enough, transplant them into boxes or 7.5cm (3in) pots and grow in cooler conditions.
- Acclimatisation: Gradually acclimatise them to outdoor conditions before planting in late spring after the last frost.
- Spacing: Space plants 30cm (12in) apart in a location with full sun and well-drained soil.
- Ongoing Care: To encourage perennial growth, cut the stems back to ground level in autumn and apply a thick mulch. Water regularly, especially during dry periods.