Hollyhock Seeds – Double

Hollyhock ‘Double’ is a classic cottage garden favorite known for its tall spikes of large, fully double blooms. These vibrant flowers create a striking vertical accent in any garden, adding old-fashioned charm and color. The Double Hollyhock variety produces dense, ruffled blossoms in shades of pink, red, yellow, white, and purple. It attracts bees, butterflies, and hummingbirds, making it ideal for pollinator-friendly landscapes. Easy to grow and low maintenance, this variety thrives in sunny spots with well-drained soil, providing long-lasting blooms throughout summer.

Features:

• Produces tall flower spikes with large, double-petaled blooms.

• Available in a range of bright, mixed colors.

• Attracts butterflies, bees, and hummingbirds.

• Excellent for background borders, fences, or walls.

• Long blooming period with strong garden performance.

• Hardy and easy to grow from seed.

Specifications:

• Scientific Name: Alcea rosea ‘Double Mix’

• Common Name (US): Hollyhock

• Plant Type: Biennial or short-lived perennial

• Bloom Color: Mixed (pink, red, yellow, white, purple)

• Bloom Size: 3–5 inches in diameter

• Plant Height: 5–8 feet (150–240 cm)

• Sunlight Requirement: Full Sun

• Soil Type: Fertile, well-drained soil

• Watering: Moderate; keep soil evenly moist but not soggy

• Germination Time: 10–14 days

• Days to Bloom: 120–150 days after sowing

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

• Spacing: 18–24 inches apart

• Growing Season: Spring to Summer

• 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: Borders, fences, cottage gardens, cut flower arrangements