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Product Description
Rainbow Hydrangea Flower Seeds for Planting – Compact Growth, Heirloom & GMO-Free Seeds for Home Garden
Bring vibrant colors and elegant blooms to your garden with Rainbow Hydrangea seeds. These heirloom seeds are ideal for gardeners seeking a compact, decorative plant that adds charm and color variety to flower beds, pots, and borders. Perfect for home gardens, patios, and balconies, these non-GMO seeds ensure healthy growth and long-lasting blooms.
Features & Specifications:
Plant Type: Perennial Flower
Bloom Colors: Multi-colored “rainbow” shades as flowers mature
Growth Habit: Compact and bushy, ideal for small spaces
Seed Type: Heirloom, non-GMO
Sun Requirements: Partial sun to full sun
Watering Needs: Moderate; keep soil evenly moist
Mature Height: 30–60 cm (12–24 inches)
Suitable For: Home gardens, pots, flower beds, and decorative landscaping
Planting & Sowing Instructions:
Soil Preparation: Use well-draining, fertile soil enriched with organic compost.
Sowing: Sow seeds indoors 6–8 weeks before the last frost or directly in prepared garden soil after frost danger has passed.
Depth: Sow seeds 0.5 cm (1/4 inch) deep and gently cover with soil.
Watering: Keep soil consistently moist but not waterlogged.
Germination: Seeds typically germinate within 14–21 days at a temperature of 18–22°C (65–72°F).
Transplanting: When seedlings have 2–3 true leaves, transplant them into garden beds or larger pots with proper spacing of 30–45 cm (12–18 inches).

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