Contents
Description
Alcea Rosea Nigra, commonly known as Black Hollyhock, is a tall and elegant biennial or short-lived perennial plant that belongs to the Malvaceae family. It is native to southwestern and central Asia and is now widely cultivated in many parts of the world for its stunning dark-colored flowers that bloom in summer.
Taxonomic Information
| Domain | Eukarya |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Malvales |
| Family | Malvaceae |
| Genus | Alcea |
Appearance
Alcea Rosea Nigra can grow up to 6 feet tall and 2 feet wide. Its leaves are heart-shaped and rough to the touch, with a velvety texture. The flowers are single, semi-double or double, and can grow up to 4 inches wide. They are deep maroon or black in color, with a distinctive dark center. The blooms appear in early summer and last for several weeks, attracting bees, butterflies, and hummingbirds. The plant’s stem is tall and sturdy, covered with short hairs, and can be used as a support for other plants.
Care Guide
Alcea Rosea Nigra is a relatively easy plant to grow and care for. Here are some tips:
- Water: Water regularly, keeping the soil moist but not waterlogged.
- Fertilization: Fertilize in early spring with a balanced fertilizer. Avoid over-fertilizing, as it can lead to weak growth and fewer flowers.
- Soil: Grow in well-draining, fertile soil that is slightly acidic (pH 6.0-7.0).
- Sunlight: Plant in full sun to partial shade. The more sun it receives, the more flowers it will produce.
- Hardiness Zones: Alcea Rosea Nigra can grow in zones 3-9.
Common Pests & Diseases
Alcea Rosea Nigra is generally resistant to pests and diseases, but it can occasionally be affected by rust, leaf spot, and spider mites. To prevent these problems, avoid overcrowding and provide good air circulation. If necessary, treat with a fungicide or insecticide.
Habitat
Alcea Rosea Nigra is native to southwestern and central Asia, where it grows in dry, rocky places and along roadsides. It prefers well-draining, fertile soil and full sun to partial shade.
Question and Answer
Q: When should I plant Alcea Rosea Nigra?
A: You can plant it in spring or fall, depending on your climate.
Q: How often should I fertilize Alcea Rosea Nigra?
A: Fertilize once in early spring, and then again in mid-summer if necessary.
Q: Can I grow Alcea Rosea Nigra in a container?
A: Yes, you can grow it in a large container that is at least 18 inches deep and wide.
Q: Can Alcea Rosea Nigra tolerate drought?
A: It can tolerate some drought, but it prefers consistently moist soil.
Related Plants
- Alcea Rosea (Common Hollyhock)
- Alcea Rugosa (Russian Hollyhock)
- Alcea Ficifolia (Antwerp Hollyhock)
References
- Missouri Botanical Garden. (n.d.). Alcea Rosea Nigra. Retrieved from http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=b214
- RHS. (n.d.). Alcea Rosea Nigra. Retrieved from https://www.rhs.org.uk/Plants/4483/Alcea-rosea-Nigra/Details
- University of Minnesota Extension. (n.d.). Hollyhocks. Retrieved from https://extension.umn.edu/perennials/hollyhocks
