Hollyhock Seeds – Blacknight

Hollyhock ‘Blacknight’ is a striking variety known for its tall spikes of deep, near-black blooms that add bold drama to any garden. These classic cottage garden favorites produce rich, velvety flowers that create a stunning contrast against green foliage. Ideal for planting along fences, walls, or as a backdrop in flower beds, Blacknight Hollyhocks bring timeless beauty and elegance to outdoor landscapes. This biennial plant blooms in its second year and is a reliable self-seeder, returning year after year with minimal effort.

Features:

• Produces tall flower spikes with deep, almost black blossoms.

• Excellent for cottage gardens, borders, and background planting.

• Attracts bees, butterflies, and other pollinators.

• Can self-seed for recurring blooms in future seasons.

• Easy to grow and thrives in full sunlight.

• Works beautifully as a cut flower or ornamental display.

Specifications:

• Scientific Name: Alcea rosea ‘Blacknight’

• Common Name (US): Hollyhock

• Plant Type: Biennial (can reseed annually)

• Bloom Color: Deep maroon to near black

• Bloom Size: 3–4 inches (7–10 cm)

• Plant Height: 5–8 feet (150–240 cm)

• Sunlight Requirement: Full Sun

• Soil Type: Well-drained, moderately fertile soil

• Watering: Moderate; keep soil moist but not soggy

• Germination Time: 10–14 days

• Days to Bloom: Approximately 365–400 days (blooms in second year)

• Sowing Method: Direct sow in late spring or start indoors 6–8 weeks before last frost

• Spacing: 18–24 inches apart

• Growing Season: Spring to Fall

• USDA Hardiness Zones: 3–9

• Best Planting Months (by Zone):

  • Zones 3–5: May to June

  • Zones 6–7: April to May

  • Zones 8–9: February to March

• Use: Garden borders, cottage gardens, wall-side planting, and decorative landscape displays