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Product Description
Black Hollyhock Flower Seeds – Pollinator Friendly, Heirloom & GMO Free Seeds for Home Garden
Add dramatic height and stunning dark blooms to your garden with Black Hollyhock Flower seeds. This heirloom variety produces tall spikes of deep black flowers, perfect for borders, cottage gardens, and attracting pollinators. GMO-free and easy to grow, Black Hollyhock is ideal for gardeners seeking low-maintenance, long-lasting plants that create visual impact and support a healthy garden ecosystem.
Features & Specifications:
Variety: Black Hollyhock
Type: Heirloom, Non-GMO
Blooming Season: Summer
Height: 5–8 feet (150–240 cm)
Sun Requirements: Full sun
Soil: Well-drained, fertile soil
Planting & Sowing Instructions:
Sowing Time: Sow seeds indoors 6–8 weeks before the last frost or directly outdoors after frost risk.
Depth: Sow seeds ¼ inch (0.5–1 cm) deep in seed-starting mix or garden soil.
Spacing: Thin seedlings to 18–24 inches (45–60 cm) apart for optimal growth.
Watering: Keep soil evenly moist until seedlings establish; moderately drought-tolerant once mature.
Care: Provide full sun and well-drained soil. Stake tall plants if necessary and deadhead spent blooms to encourage continuous flowering.
Life Cycle
Biennial flowering plant
Planting Season
Spring to summer
Growth Habit
Tall upright growth
Flavor Profile
No edible flavor
Plant Characteristics
Deep black blooms
Use
Pollinator garden plant
Growing Conditions
Warm sunny climate
Harvest Advantages
Long bloom season
Plant Resistance
Moderate drought tolerance
Scientific Name: Alcea rosea
Seed Names
Black Hollyhock
Seed Type
Open pollinated
Black Hollyhock Flower Seeds grow into tall plants producing dramatic deep black blossoms along strong flowering stalks. These heirloom, GMO-free seeds are perfect for cottage gardens, borders, and pollinator-friendly landscapes.
Light Requirement
Full sun
Planting Depth
¼ inch deep
Sowing Method
Direct or trays
Plant Spacing
18–24 inches
Days to Maturity
90–120 days
Soil Preparation
No pre-treatment
Hardiness Zones
USDA zones 3–9
Water Needs
Moderate watering
Planting Season
Spring or fall
Seed Count
Recommended Coverage
100
Up to 15 sq ft
500
Up to 75 sq ft
1000
Up to 150 sq ft