Tall Flower Spikes
Produces impressive upright stems covered with flowers, adding height and visual interest to garden borders.
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Alcea Rosea, commonly known as hollyhock, is a popular ornamental flowering plant admired for its tall flower spikes and large, colorful blooms. Its flowers can appear in shades of pink, red, purple, white, and yellow, depending on the variety. Hollyhocks are ideal for cottage gardens, flower borders, fence lines, and cut-flower arrangements. These easy-to-grow plants thrive in sunny locations with fertile, well-drained soil and can attract bees and butterflies to the garden.
Produces impressive upright stems covered with flowers, adding height and visual interest to garden borders.
Depending on the seed variety, blooms may appear in pink, red, purple, white, yellow, and other attractive shades.
Open-flowered hollyhock varieties can provide a useful source of pollen and nectar for bees and other pollinators.
Well suited to cottage gardens, sunny borders, fence lines, and selected cut-flower arrangements.
| Scientific Name | Alcea rosea |
| Common Name | Hollyhock; Common Hollyhock |
| Plant Family | Malvaceae |
| Seed Type | Flower Seeds |
| Plant Type | Herbaceous flowering plant; usually biennial or short-lived perennial, depending on variety |
| Growth Habit | Tall, upright flowering stems |
| Flower Colors | Pink, red, purple, white, yellow, and other variety-dependent shades |
| Blooming Season | Usually summer; timing varies by climate and sowing date |
| USDA Hardiness Zones | Generally suited to zones 5–9, depending on cultivar and local conditions |
| Planting Season | Spring or early summer; suitable autumn sowing may be possible in mild climates |
| Seed Starting | Sow indoors in containers or directly into prepared garden soil |
| Germination Time | Approximately 5–21 days under suitable conditions |
| Germination Temperature | Approximately 16–21°C (61–70°F) |
| Sunlight | Full sun; light shade may be tolerated in warmer climates |
| Soil Requirements | Fertile, moderately moist, well-drained soil |
| Watering | Water regularly during establishment; avoid waterlogged soil |
| Mature Plant Height | Approximately 1.5–2.5 metres, depending on variety and conditions |
| Mature Plant Spread | Approximately 0.5–1 metre, depending on variety |
| Plant Spacing | Allow approximately 45–60 cm between plants, adjusting for variety |
| Propagation Method | Seeds |
Alcea Rosea Hollyhock Seeds are an excellent choice for gardeners looking to add height, color, and traditional floral charm to outdoor spaces. Their tall stems and showy blooms create an attractive backdrop for borders, cottage gardens, and cut-flower displays. With plenty of sunlight, fertile soil, and consistent care during establishment, hollyhocks can reward gardeners with beautiful seasonal flowers and may produce new plants through self-seeding.
Learn about hollyhock seed germination, flowering time, and common growing requirements.
Hollyhock seeds typically germinate in about 5–21 days under suitable conditions. Sow them in moist soil at approximately 16–21°C (61–70°F), cover them lightly, and provide gentle warmth and adequate light.
Many hollyhocks flower in their second year because they are commonly grown as biennials. However, some varieties can bloom in their first year when sown early under favorable conditions. Check the variety description for its expected flowering time.
Help prevent hollyhock rust by spacing plants for good airflow, watering at soil level rather than wetting the leaves, and removing infected foliage promptly. Avoid overcrowding and discard diseased plant material instead of composting it.