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Bluets, botanically known as Houstonia caerulea, are low-growing perennial plants valued for their delicate appearance and fine-textured growth. They develop small clumps of narrow leaves and produce tiny, star-shaped blue flowers with pale centers during the growing season. This plant adapts well to cool and temperate climates and performs best in full sun to partial shade with well-drained soil. Bluets are commonly used in rock gardens, borders, lawns, and naturalized planting, where they establish gradually from seeds and spread gently over time.
Features
- Low-growing perennial with delicate, compact growth
- Produces small blue star-shaped flowers
- Suitable for rock gardens, lawns, and borders
- Adapted to cool and temperate climates
- Forms gentle spreading ground cover
Specifications
- Scientific name: Houstonia caerulea
- Common name (US): Bluets
- Seed type / variety: Blue flowering variety
- Growth habit: Low-growing perennial
- USDA zones: 3-8
- Planting season: Spring or fall
- Growing season: Spring to early summer
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Sowing Season:
- Spring: March to May
- Fall: September to October
- Germination time and conditions: 2-4 weeks at 15-20°C; light aids germination
- Sunlight requirements: Full sun to partial shade
- Soil requirements: Well-drained soil, slightly acidic preferred
- Watering needs: Moderate, consistent moisture
- Mature plant size: 5-15 cm height, 15-30 cm spread
- Plant spacing: 10-20 cm between plants
