Alcea rosea - 2026

Alcea rosea, commonly known as hollyhock, is a tall, striking biennial or short-lived perennial celebrated for its impressive spires of large, cup-shaped flowers that can reach up to 10 cm across. Blooming from mid-summer to early autumn, the flowers appear in a wide range of vibrant colours, including red, pink, white, yellow, and purple, creating a dramatic vertical accent in borders, cottage gardens, or along fences and walls. Its tall, architectural form provides excellent backdrops for mixed plantings and is particularly effective when grouped in clusters for maximum visual impact. Hollyhocks are also valued for attracting pollinators such as bees and butterflies, enhancing garden biodiversity. They are relatively easy to grow from seed and can self-seed, providing a continual display year after year when conditions are suitable.

Alcea rosea thrives in full sun and well-drained soil, showing good tolerance for heat and moderate drought once established. Staking may be required for taller varieties to prevent flopping in windy conditions. Regular deadheading can prolong the flowering season, while occasional feeding encourages strong growth and vibrant blooms. Resistant to most pests, hollyhocks do occasionally attract rust, which can be managed through good air circulation and removal of affected leaves. Their combination of height, colour, and pollinator-friendly blooms makes them a classic and versatile choice for traditional and modern gardens alike.