Black Hollyhock – Seeds (Althaea rosea nigra)

Black Hollyhock (Althaea rosea nigra) is a striking biennial producing tall spikes of deep, dark purple to almost black double blooms. Its dramatic flowers create a bold focal point in borders, cottage gardens, and pollinator-friendly areas. Easy to grow and long-lasting, this variety attracts bees and butterflies while adding elegance and vertical interest to any garden.

Why Grow "Black Hollyhock"

• Tall spikes of deep purple to nearly black flowers

• Dramatic focal point for borders and cottage gardens

• Attracts bees, butterflies, and other pollinators

• Hardy biennial with long-lasting blooms

Key Features

• Type: Biennial (Althaea rosea nigra)

• Height: 1.8–2.0 m

• Flowering: Second year after sowing

• Position: Full sun

• Uses: Borders, cottage gardens, pollinator planting, cut flowers

Ideal For

• Creating vertical interest and dramatic color in borders

• Cottage and mixed garden designs

• Pollinator-friendly planting

• Gardeners seeking bold, elegant biennial flowers

Sowing & Growing

• Sow indoors: January–March

• Sow outdoors: Directly in soil April–May

• Germination: 14–21 days

• Plant out after last frost, spacing 45–60 cm apart

• Prefers full sun and well-drained soil