It is all in one: beautiful and original, mysterious and ornamental… Black hollyhock is without doubt one of the most remarkable hollyhocks.
Basic Black hollyhock facts
Name – Alcea rosea nigra
Family – Malvaceae
Type – perennial
Height – 4 to 8 feet (120 to 250 cm)
Exposure – full sun
Soil – sandy
Flowering – June to September
It carries the scientific name Alcea rosea nigra and bears black-colored flowers, even though the true color is closer to violet-brown than true black.
Black hollyhock isn’t the tallest, but its blooming is beautiful and abundant.
It is a plant that reseeds itself on its own, but sometimes its offspring have slightly different colors from the original brown black, nothing to worry about.
Black hollyhock is amazing when planted with a white wall as backdrop, its color marks a strong contrast that makes it stand out.
Planting and caring for black hollyhock
Caring for and growing black hollyhock is identical to that of all the Alcea rosea.
- Find all our tips on how to grow and care for hollyhock
Smart tip about black hollyhock
When your black hollyhock have finished blooming, collect only those seeds coming from the darkest plants and flowers. That way you’ll be deepening the hue with every following generation!
Credits for images shared to Nature & Garden (all edits by Gaspard Lorthiois):
Single black hollyhock shared by PommeGrenade under © CC0 1.0
Black hollyhock flower scape shared by Scott Davies under © CC BY-NC 2.0