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Penstemon Heterophyllus True Blue - 40 Seeds - Thompson & Morgan

Penstemon Heterophyllus True Blue - 40 Seeds - Thompson & Morgan

Penstemon heterophyllus 'True Blue' produces striking true blue trumpet blooms that beautifully co...

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B&QB&Q - Penstemon Heterophyllus True Blue 1 Seed Packet (40 Seeds)
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wilkoPenstemon Heterophyllus True Seeds - Size: 20 X 10 X 5Cm - Wilko Blue Thompson & Morgan
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Product Information

Full details

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 Number24270
BrandThompson & 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

  1. 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.
  2. Light and Moisture: Ensure seeds have access to light. Sealing sown containers in a polythene bag can aid germination.
  3. Transplanting: Once seedlings are large enough, transplant them into boxes or 7.5cm (3in) pots and grow in cooler conditions.
  4. Acclimatisation: Gradually acclimatise them to outdoor conditions before planting in late spring after the last frost.
  5. Spacing: Space plants 30cm (12in) apart in a location with full sun and well-drained soil.
  6. 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.

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