Trachelium caeruleum Supreme Early Blue | Throatwort

Trachelium caeruleum Supreme Early Blue | Throatwort

Trachelium caeruleum Supreme Early Blue is a striking violet-blue variety in the Supreme series, offering earlier blooms than its counterpart, Supreme Blue. Known for its uniform growth, vigorous flowering, and large central clusters of star-shaped flowers, it’s a beautiful addition to any floral arrangement. This series blooms in both spring and autumn, and in milder climates, it can be produced almost year-round, making it an ideal choice for seasonal transitions in gardens and floral productions.

Key Features:

• Vibrant Violet-Blue Blooms: Large, eye-catching central clusters of star-shaped flowers, surrounded by smaller side umbels.
• Early Blooming: Flowers earlier than other varieties in the Supreme series.
• Uniform Growth: A uniform, vigorous variety perfect for cut flowers and garden displays.
• Seasonal Flexibility: Blooms reliably in both spring and autumn, adaptable for almost year-round production in mild climates.
• Versatile: Excellent for filling seasonal gaps, making it a stable factor for transitional periods in floral designs.

Additional Details:

• Light Preference: Full sun to part shade
• Plant Height: 75-90 cm
• Stem Length: 75-90 cm
• Hardiness Zones: 5-9 (Annual in most climates)
• Soil Requirements: Well-drained, fertile soil with neutral to slightly acidic pH

Growing Information:

• Scientific Name: Trachelium caeruleum
• Cultivation Location: Greenhouse
• Plant Density: 24-86 plants per m²
• Sowing Period: Midwinter to early spring, late summer to autumn
• Cultivation Temperature: Cool to warm
• Time to Young Plant: 8-12 weeks
• Time to Maturity: 17-27 weeks
• Days to Germination: 10-14 days at 18-22°C

Sowing & Cultivation:

• Starting Material: Pelleted seed
• Sowing Method: Sow 1 seed per plug in a 288-cell tray. No covering is required for the seed.
• Sowing Media: Well-drained, sifted, loose soil with a pH of 6.0 and 0.5-0.9 EC.
• Fertilization: Begin with 1.0 EC ms/cm, alternating between calcium nitrate and potassium nitrate. Discontinue nitrogen in the last 4 weeks of cultivation.
• Watering: Water moderately to keep soil moist but not waterlogged.
• Transplanting: Move seedlings to larger containers once true leaves develop (approx. 6 weeks after sowing).
• Pinching (Optional): Pinch the plants 2–3 weeks after planting, when the second and third leaf pairs appear. This promotes a bushier growth habit with more flower-producing stems.
• Spacing: Space plants 24-30 cm apart for optimal growth.

Harvesting & Storage:

• Harvest: Cut flowers when 70-80% of the flowers in the cluster are open. This ensures the blooms are fully developed but not past their prime.
• Storage Temperature: 2-5°C for best vase life.
• Vase Life: 7-10 days

Uses:

Perfect for cut flower production, floral arrangements, and garden borders. Its striking violet-blue blooms make it a standout in any bouquet.

Trachelium caeruleum Supreme Early Blue is ideal for growers and florists looking to add a distinctive, early-blooming variety to their collection. With its beautiful color and reliable blooming, it’s a perfect choice for extending the flowering season and creating high-quality floral arrangements.