Alcea rosea 'Nigra' - 2026

Alcea rosea 'Nigra' is a striking hollyhock cultivar prized for its tall, stately stems adorned with large, deep, almost black flowers that provide a dramatic focal point in summer borders or against walls and fences. Blooming from mid-summer to early autumn, the abundant flowers can reach up to 10 cm across, creating a bold vertical accent that contrasts beautifully with lighter-coloured plants. Its rich, dark blooms attract pollinators like bees and butterflies, enhancing garden biodiversity while offering long-lasting colour throughout the season. Hollyhocks are easy to grow from seed or young plants, and in suitable conditions, they may self-seed, providing continuity year after year. Regular deadheading can encourage further blooms, while staking supports the tall stems in exposed areas, ensuring a spectacular display with minimal effort.