Alcea rosea Blacknight (Hollyhock)
Providing architectural height to borders, Alcea rosea ‘Blacknight’ (Hollyhock) is a robust perennial which produces tall, sturdy spikes of funnel-shaped, deep black-purple, single flowers, 4 in. across (10 cm), with a bright buttery-yellow throat. Blooming from mid to late summer, the striking flowers are arranged all around the spike and bloom from the bottom up.
Providing architectural height to borders, Alcea rosea 'Blacknight' (Hollyhock) is a robust perennial which produces tall, sturdy spikes of funnel-shaped, deep black-purple, single flowers, 4 in. across (10 cm), with a bright buttery-yellow throat. Blooming from mid to late summer, the striking flowers are arranged all around the spike and bloom from the bottom up. An old garden favorite, Hollyhock is best when grown against a wall or fence or at the back of the border.
Requirements
| Hardiness | 3 – 9 |
|---|---|
| Heat Zones | 3 – 10 |
| Climate Zones | 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 |
| Plant Type | Perennials |
| Plant Family | Alcea – Hollyhocks |
| Exposure | Full Sun |
| Season of Interest | Summer (Mid,Late) |
| Height | 5' – 6' (150cm – 180cm) |
| Spread | 1' – 2' (30cm – 60cm) |
| Spacing | 24″ (60cm) |
| Water Needs | Average |
| Maintenance | High |
| Soil Type | Chalk, Clay, Loam, Sand |
| Soil pH | Acid, Alkaline, Neutral |
| Soil Drainage | Well-Drained |
| Characteristics | Cut Flowers, Showy |
| Tolerance | Rabbit |
| Attracts | Butterflies, Hummingbirds |
| Garden Uses | Beds and Borders, Wall-Side Borders, Walls and Fences |
| Garden Styles | Coastal Garden, Informal and Cottage |