Thompson & Morgan Polemonium Boreale Heavenly Habit - 1 Seed Packet
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The Thompson & Morgan Polemonium Boreale 'Heavenly Habit' is a versatile perennial ideal for home gardeners looking to add compact, vibrant color to the front of borders or patio containers. Its key benefit is its reliable, long-lasting violet-blue blooms that appear throughout the summer months when managed with proper dead-heading. While it is easy to cultivate, growers should note that it requires consistent moisture and well-drained soil to thrive, making it less suitable for extremely dry or sandy garden environments.
All features
| Model Part Number | 26220 |
|---|---|
| Brand | Thompson & Morgan |
Extended Product Information
FAQs
When is the best time to sow these seeds?
You can sow the seeds anytime from late winter through mid-summer.
Can these be grown in pots?
Yes, their dwarf habit makes them an excellent choice for container growing.
How deep should I plant the seeds?
Sow the seeds approximately 1/16in (1.5mm) deep in seed-sowing compost.
Do I need to do anything special for the second year?
As a perennial, keep the soil moist and well-drained, and continue to dead-head during the flowering season.
Will they flower in the first year?
Yes, if sown early enough in the season, they can flower within their first year.
How far apart should I plant them in the garden?
Plant them at a spacing of 30cm (12in) apart to allow for proper airflow and development.
Troubleshooting
Seeds failing to germinate
Verify that your temperature is within the 20-25C range and consider lowering the ambient temperature at night to mimic natural conditions.
Plants are wilting quickly
Check soil moisture levels; these plants prefer moist soil and will show signs of stress if allowed to dry out completely.
Poor flowering mid-summer
Ensure you are consistently dead-heading spent flowers to encourage the plant to produce new blooms.
Pros and Cons
Pros
- Compact size fits well in small gardens and containers
- First-season flowering possible from early sowing
- Attractive color contrast between blooms and foliage
- Easy to manage with basic dead-heading
- Flexible light requirements (sun or semi-shade)
Cons
- Requires regular moisture and well-drained soil
- Germination requires specific temperature control
- Needs careful hardening off before transplanting outdoors
Setup, Compatibility & Care
To start your seeds, sow them 1.5mm deep in high-quality seed compost. Place the tray in an environment kept between 20-25C (70-75F) to ensure germination, which typically occurs within 7 to 21 days; note that slightly cooler nighttime temperatures can actually improve results. Once seedlings are large enough, transplant them into 7.5cm pots. Before moving them to their permanent outdoor position in late spring, ensure you gradually acclimatize them to outdoor conditions. Space plants 30cm apart in soil that stays moist but drains well to prevent root rot. Keep the soil enriched with organic matter for best results in full sun or semi-shade locations.