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Product Description
Add a splash of brilliant color to your garden with Centranthus Ruber Flower seeds. Known for their clusters of bright blooms and long flowering season, these heirloom, non-GMO seeds are a perfect choice for home gardeners. Easy to grow and highly adaptable, Centranthus Ruber thrives in borders, cottage gardens, and containers, creating a vibrant display that attracts butterflies and pollinators.
Features & Specifications:
Variety: Centranthus Ruber – Bright Blooms
Seed Type: Heirloom, non-GMO
Germination Rate: High, suitable for home planting
Plant Height: 60–90 cm (24–36 inches)
Flowering Season: Late spring to autumn
Light Requirements: Full sun to partial shade
Ideal For: Borders, cottage gardens, containers, and pollinator-friendly displays
Planting & Sowing Instructions:
Sowing: Sow seeds directly outdoors in well-drained soil or start indoors in trays. Lightly cover with soil (about 3 mm).
Watering: Keep soil lightly moist during germination, but avoid overwatering.
Temperature: Best germination occurs at 18–22°C (65–72°F).
Germination Time: Seeds usually sprout within 14–21 days.
Transplanting: Thin or transplant seedlings once they reach 5–7 cm tall, spacing 30–40 cm apart.
Care: Low maintenance; deadhead spent blooms to encourage continuous flowering. Drought tolerant once established.

Life Cycle
Annual
Planting Season
Spring–Early Summer
Growth Habit
Mounding Spreading
Flavor Profile
Not
Plant Characteristics
Deep Black Blooms
Use
Borders, Containers
Growing Conditions
Full Sun, Loamy Soil
Harvest Advantages
Continuous Bloom
Plant Resistance
Heat Tolerant
Seed Names
Black Velvet Petunia
Seed Type
Hybrid Open-Pollinated
Light Requirement
Full Sun
Planting Depth
Surface Sow
Sowing Method
Indoor or Direct
Plant Spacing
10–12 Inches
Days to Maturity
80–90 Days
Soil Preparation
No Soaking Needed
Hardiness Zones
9–11
Water Needs
Moderate
Planting Season
Spring
Seed Count
Recommended Coverage
100
Up to 50 sq ft
500
Up to 250 sq ft
1000
Up to 500 sq ft