Cantias (Cantua buxifolia) is a captivating flowering shrub with striking blooms and ornamental appeal. Often called “Magic Flower,” “Flower of the Inca,” or “Peruvian Magic Tree,” this plant adds vibrant beauty. Its unique tubular flowers and attractive foliage make it a desirable addition for gardeners seeking exotic flair and a long blooming season.
Understanding Cantias
Cantias grow as upright, fast-growing evergreen shrubs, reaching 6 to 13 feet tall and 6 to 8 feet wide. They have erect stems with arching branches and small, semi-succulent, gray-green leaves (1/2 to 1 inch long), resembling boxwood. In spring, vibrant, tubular flowers emerge, about 3 inches long with a flaring mouth, dangling from thin pedicels. These blossoms come in shades of pink, magenta, red, orange, yellow, and white, often displaying bright blue pollen.
Native to the high valleys of the Yungas, a forest region along the eastern slopes of the Andes Mountains in Peru, Bolivia, and Ecuador, Cantias can grow into small trees up to 18 feet tall in their natural habitat. It is also the national flower of Peru and one of the two national flowers of Bolivia.
Cantias Plant Care
Light Requirements
Cantias thrive with ample sunlight, ideally at least six to eight hours of direct sun daily. Full sun encourages abundant flowering. They can tolerate partial shade, especially in hotter inland areas, but too little sunlight leads to leggy growth and fewer blooms.
Soil Preferences
Well-draining soil is important for Cantias, preventing waterlogging and root issues. They prefer rich soil, benefiting from organic matter like compost. A suitable mix often includes garden soil, compost, and perlite in equal parts. They tolerate a range of pH levels from slightly acidic to neutral.
Watering Needs
Cantias require consistent moisture during their active growing season. Water thoroughly every 1-2 weeks, allowing the soil to dry slightly between sessions to prevent root rot. Reduce watering frequency during dormant periods, typically in winter.
Temperature and Hardiness
Cantias are suited for warmer climates and are hardy in USDA Zones 9b through 11. They prefer temperatures between 68°F and 95°F (20°C and 35°C). The plant is sensitive to frost, tolerating temperatures down to around 20-25°F, but requires protection in colder regions.
Fertilizing
Cantias benefit from regular fertilization during their active growth phase to support healthy growth and prolific flowering. Apply a balanced liquid fertilizer once a month. Alternatively, incorporate a balanced slow-release fertilizer into the soil during planting.
Pruning and Maintenance
Pruning helps Cantias maintain shape, encourages bushier growth, and promotes more blooms. The optimal time for pruning is after flowering, in late spring or early summer, as flowers are produced on the previous season’s wood. Removing dead, diseased, or overreaching branches helps improve air circulation and sunlight penetration within the plant. While light pruning encourages bushiness and more flowers, heavy pruning should be avoided as it can reduce future blooms.
Propagating Cantias
Cantias can be propagated from semi-hardwood or non-flowering stem cuttings taken during the active growing season, such as spring or early summer. For successful rooting, select healthy cuttings 4-6 inches long with several leaf nodes. After removing lower leaves, dip the cut end in rooting hormone to stimulate root development. Plant these cuttings in a well-draining rooting mix and keep them in a warm, humid environment with consistent moisture.
Addressing Common Cantias Issues
While generally robust, Cantias can encounter certain problems. Pests like aphids and spider mites may affect the plant, which can be managed with insecticidal soap or neem oil applications. Fungal issues, such as root rot, arise from overwatering or poorly draining soil. These can be prevented by ensuring proper soil conditions and watering practices. Regular inspection helps in early identification and prompt resolution of issues.