Hollyhock flower Alcea rosea double white perennial seeds for large garden blooms

Enhance your garden with Alcea Rosea Double White Seeds, a perennial hollyhock variety producing tall spikes of double white flowers. Ideal for garden borders, cottage gardens, and perennial beds, these hollyhocks provide long-lasting summer color and dramatic vertical accents.

Double-flowered hollyhocks are hardy, low-maintenance, and attract pollinators such as bees and butterflies, making them a standout feature in any landscape.

Features

• Tall spikes with double white blooms
• Hardy perennial suitable for borders and cottage gardens
• Long-lasting flowering from mid-summer to early fall
• Attracts pollinators including bees and butterflies
• Low-maintenance and drought-tolerant once established
• Perfect for dramatic vertical accents in gardens

Specifications

• Botanical Name: Alcea rosea
• Type: Perennial
• Flower Color: White (Double)
• Light Requirements: Full Sun
• Soil Type: Well-drained, fertile soil
• Bloom Season: Summer to Early Fall
• Hardiness Zones: USDA Zones 3–9
• Plant Height: 5–8 feet (1.5–2.4 meters)
• Plant Spacing: 18–24 inches apart
• Germination Time: 14–21 days
• Planting Depth: Lightly cover seeds with soil
• Watering Needs: Moderate; water regularly until established
• Ideal Growing Season: Spring or Fall sowing for best results
• Maintenance: Remove spent flowers to prolong blooming; stake tall plants for support

Planting Guide

1. Sow seeds indoors 6–8 weeks before the last frost or direct sow outdoors after frost risk has passed.
2. Lightly cover seeds with soil and maintain consistent moisture until germination.
3. Keep soil temperature around 65–70°F (18–21°C) for optimal germination.
4. Space seedlings 18–24 inches apart in full sun with well-drained soil.
5. Water moderately and stake tall plants to prevent flopping and maintain upright growth.