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Description
Justicia Angusta, commonly known as the “Black Jacobinia,” is a beautiful plant that belongs to the Acanthaceae family. It is native to South America, particularly Brazil, and is known for its stunning flowers that bloom in shades of dark purple and black. This evergreen shrub can grow up to 6 feet tall and 4 feet wide, making it an excellent choice for adding height and color to any garden or landscape.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Lamiales |
| Family | Acanthaceae |
| Genus | Justicia |
Appearance
Justicia Angusta has glossy, dark green leaves that are 6-8 inches long and 2-3 inches wide. The flowers grow in clusters at the top of the stems and can be up to 3 inches long. The petals are deep purple or black and surround a white center that is filled with stamens. The plant blooms from late spring to early fall and attracts bees, butterflies, and hummingbirds.
Care Guide
Justicia Angusta is a relatively low-maintenance plant that requires moderate care to thrive. Here are some tips for caring for your Black Jacobinia:
- Water: Water your plant regularly, but be careful not to overwater. Allow the soil to dry out slightly between waterings.
- Fertilization: Fertilize your plant every 4-6 weeks during the growing season with a balanced fertilizer.
- Soil: Justicia Angusta prefers well-draining soil that is rich in organic matter.
- Sunlight: This plant prefers full sun to partial shade. Provide at least 6 hours of direct sunlight per day.
- Hardiness Zones: Justicia Angusta is hardy in USDA zones 9-11.
Common Pests & Diseases
Justicia Angusta is relatively pest and disease-resistant, but it can be affected by spider mites, whiteflies, and mealybugs. Treat any infestations with an insecticidal soap or neem oil. The plant can also be susceptible to root rot if overwatered, so be sure to provide proper drainage and avoid overwatering.
Habitat
Justicia Angusta is native to South America, particularly Brazil, where it grows in tropical and subtropical forests. It prefers warm, humid climates and can be grown as a perennial in USDA zones 9-11. It can also be grown as an annual in cooler climates.
Question and Answer
Q: Can Justicia Angusta be grown indoors?
A: Yes, Justicia Angusta can be grown indoors as a houseplant as long as it is provided with enough sunlight and proper care.
Q: How often should I fertilize my Justicia Angusta?
A: Fertilize your plant every 4-6 weeks during the growing season with a balanced fertilizer.
Q: How tall does Justicia Angusta grow?
A: Justicia Angusta can grow up to 6 feet tall and 4 feet wide.
Q: When does Justicia Angusta bloom?
A: Justicia Angusta blooms from late spring to early fall.
Related Plants
- Justicia Brandegeeana (Shrimp Plant)
- Justicia Carnea (Brazilian Plume)
- Justicia Aurea (Golden Plume)
References
- “Justicia angusta.” Missouri Botanical Garden. Accessed 27 September 2021. <https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=b765>
- “Justicia angusta.” Floridata. Accessed 27 September 2021. <https://floridata.com/plant/834>
- “Justicia angusta.” Gardening Know How. Accessed 27 September 2021. <https://www.gardeningknowhow.com/ornamental/shrubs/black-jacobinia/black-jacobinia-care.htm>
