Blacknight Hollyhock
Alcea Rosea 'Blacknight'
Overview
Alcea rosea 'Blacknight', commonly known as Blacknight Hollyhock, is a striking perennial with 6-8 ft stalks adorned with deep, maroon-black blooms. This variety thrives in full sun and well-drained soil, adding dramatic vertical interest to the midsummer garden. Hardy in zones 3-8, it's excellent for back borders or as an architectural feature against walls or fences. Space plants 18-24 inches apart to allow ample growth.
Culture
- Sun
- Full
- Water
- Medium
- USDA zones
- 3–10
Shape & size
Classification
- Family
- Malvaceae
See full data, regional cultivation notes, full-resolution photos, and design tools. Build a client presentation around this plant.
Start your 14-day trialPhotos (4)




Related plants

Thuringian Mallow
Lavatera Thuringiaca
Full · Zones 8–10

Red Mallow
Pavonia Missionum
Full · Zones 7–11

Giant Turk's Cap, Wax Mallow
Malvaviscus Arboreus
Full · Zones 9–10

Tree Mallow
Lavatera Maritima
Full · Zones 8–10

Rosea Tree Mallow
Lavatera Thuringiaca 'Rosea'
Full · Zones 6–9

Thompson Flowering Maple
Abutilon Pictum 'Thompsonii'
Half · Zones 9–10