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Product Description
Transform your garden with the vibrant beauty of Sea Blue Hydrangea Flower Seeds. Known for their lush, globe-shaped clusters of vivid blue blossoms, hydrangeas make an eye-catching addition to any landscape. Perfect for garden beds, borders, or decorative pots, these flowers create a bold, colorful display throughout the summer months.
Brilliant Blue Blooms: Large, globe-like flowers with stunning sea-blue hues.
Garden Versatility: Ideal for borders, hedges, or container planting.
Long Blooming Season: Adds color and charm from summer into early autumn.
Pollinator Friendly: Attracts bees and butterflies, supporting a healthy ecosystem.
Low Maintenance: Hardy and easy to care for with proper conditions.
Plant Type: Perennial flowering shrub
Flower Color: Sea blue
Height: 3–5 feet when mature
Light Requirements: Full sun to partial shade
Watering: Moderate; prefers moist, well-drained soil
Blooming Season: Summer through early autumn
Hardiness Zone: 5–9
Seed Preparation: Soak seeds in lukewarm water for 12 hours before planting.
Soil: Use rich, well-draining soil with good moisture retention.
Sowing: Sow seeds on the soil surface, lightly pressing them in without covering deeply.
Spacing: Allow 24–36 inches between plants for proper growth.
Light & Temperature: Place in a sunny to partially shaded spot with temperatures between 18–25°C (65–77°F).
Watering: Keep soil consistently moist but not waterlogged.
Maintenance: Prune lightly after flowering to shape plants and encourage new growth.

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