Cantua buxifolia — an easy houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Cantua buxifolia

Cantua Buxifolia

Updated · 70 observations
ON THIS PLANT

Cantua buxifolia, (, Hispanicized spellings cantuta, cantu), known as qantu, qantus or qantuta (Quechua,) is a flowering plant found in the high valleys of the Yungas of the Andes mountains in western South America. Also known as the Peruvian magic tree, it is an evergreen shrub growing to 4 m (13 ft) tall by 2.5 m (8.2 ft) wide with small leaves and clusters of brilliant pink, narrow tubular flowers in early spring. It is the national flower of Peru and one of two national flowers of Bolivia, the other being the patujú (Heliconia rostrata).The Bolivian national flower is in fact a particular variety of qantuta, the qantuta tricolor, which has red petals, a yellow floral tube and a green calyx, reflecting the colors of the national flag. The Latin specific epithet buxifolia means “with leaves like Buxus (box)”.This plant requires sheltered conditions where the temperature does not fall below −5 °C (23 °F). In climates colder than that, it should be grown under glass but may be placed outside in summer. This plant has gained the Royal Horticultural Society’s Award of Garden Merit.

A note from PlantMom

The Peruvian magic tree has strong resistance to diseases and is typically not susceptible to illnesses. Regarding maintenance, this plant is fairly low-maintenance. When grown outdoors it needs only light watering, and larger specimens usually do not require pruning. Smaller plants, however, should be trimmed after they finish flowering. The Peruvian magic tree is a good choice for anyone with outdoor space, such as a garden or a deck, and it does not demand extensive plant-care experience.

— PlantMom
CARE GUIDE

How to keep Cantua Buxifolia.

Light

The peruvian magic tree performs best in environments with abundant sunlight. This species requires generous solar exposure for healthy development. Its biological origin in habitats familiar with strong light highlights its need for substantial illumination. Both too little light and excessive exposure can hamper its growth, resulting in stunted development or the risk of sunburn.

Water

The Peruvian magic tree is a remarkable plant adapted to the high-altitude environments of the Andes. It thrives in conditions where moisture levels can vary significantly. While it prefers environments with moderate humidity, it is also drought-tolerant, requiring watering only every one to two weeks, allowing the soil to dry slightly between waterings. Being an evergreen, the Peruvian magic tree retains its foliage throughout the year, helping it conserve water efficiently.

Temperature

The Peruvian magic tree is native to high-altitude habitats and prefers temperatures from 68 to 95 °F (20 to 35 ℃). In cooler climates, the Peruvian magic tree will require indoor cultivation or a warm greenhouse. Remember to adjust these conditions with the seasons.

Fertilizer

The best time to fertilize a Peruvian magic tree is in early spring as it breaks dormancy. This supports overall growth and the development of flowers. Fertilization improves the leaves, stems, and branches, while encouraging flowers that are large, bright, and long-lasting. It helps transport nutrients from the roots to the blooms and enhances the plant’s health and resistance to disease.

Pruning

The Peruvian magic tree, known for its vibrant flowers and lush foliage, thrives when regularly pruned. Ideally, pruning should be done in late spring after the tree has finished blooming. To promote better air circulation, remove any dead branches and thin out overcrowded areas. Formative pruning not only improves the tree's structure and flowering but also helps prevent disease, which is essential for maintaining a healthy and attractive plant.

Pot & Repot

To ensure the health of your Peruvian Magic Tree, it should be repotted every 2 to 3 years during early spring. Choose a container that is one size larger than the current one and has good drainage. After repotting, place the tree in bright, indirect light and provide it with moderate watering. Use fertile, well-draining soil, and handle the tree gently, as it is sensitive after being transplanted.

CHARACTERISTICS

Botanical profile.

Plant Type
Shrub
Life Cycle
Perennial
Genus
Cantua
Family
Polemoniaceae
Hardiness Zone
10
Mature Height
4.88 m
Mature Spread
2.44 m
Leaf Color
Green
Leaf Type
Evergreen
Flower Color
Red, Pink, Purple, White
Flower Size
7.62 cm to 10.16 cm
Bloom Time
Spring, Summer
Planting Time
Spring, Summer, Autumn
Harvest Time
Summer, Fall
Native Area
Chile, Peru, Bolivia
ALSO KNOWN AS

Other names.

en Magic-flower en Magic-flower-of-the-Incas en Magictree en Sacred-flower-of-the-Incas en Magic flower of the Incas en Sacred flower of the Incas
FREQUENTLY ASKED

Reader questions.

How should I water my Peruvian magic tree?

To water your Peruvian magic tree, you can use various common tools like watering cans, hoses, or cups. It's important to apply the water directly to the soil, making sure to moisten all areas evenly to provide sufficient hydration to the entire root system. Filtering the water is recommended to avoid potentially harmful particles. Also, using water that is at or slightly above room temperature is ideal, as very cold or hot water can be a bit shocking to the plant. Nevertheless, the Peruvian magic tree generally adapts well to different water sources.

Why should I add fertilizer to my Peruvian magic tree?

Fertilization plays a crucial role in the overall health and well-being of a Peruvian magic tree. When provided with the right combination of energy and nutrients, this tree will develop lush foliage and sturdy stems and branches. What's more, the flowers of this tree are highly valuable to gardeners. Thankfully, fertilization also contributes to the production of large, vibrant, and long-lasting flowers. The reason for this is that the appropriate fertilizer facilitates the transfer of fuel from the tree's roots to its flowers through its stems. Moreover, proper fertilization helps maintain the tree's general health, enhancing its ability to resist diseases.

What are the sunlight requirements for a Peruvian Magic Tree?

The Peruvian Magic Tree, or Cantua buxifolia, thrives best in conditions where it can receive abundant sunlight. It requires above 6 hours of direct sunlight daily for healthy growth. Originating from habitats accustomed to intense luminosity, substantial illumination is crucial. Insufficient sunlight or overexposure can hinder its growth, causing stunted development or risking sunburns. It is important to observe how sunlight moves through your garden and choose spots that provide a balance of light and shade, ensuring the optimal growth and happiness of your plants.

What is the native environment of the Peruvian magic tree?

The Peruvian magic tree, or Cantua buxifolia, is native to high-altitude environments and thrives in temperatures ranging from 68 to 95 °F (20 to 35 °C). Due to its preference for warmer climates, it requires indoor cultivation or the use of a warm greenhouse in cooler climates. It's crucial to adjust the care and environment of the Peruvian magic tree according to seasonal changes to ensure its health and growth.

What should I do if I give too much or too little water to my Peruvian magic tree?

Outdoor plants, especially newly planted ones or seedlings, are prone to lack of watering. So, it's important to water them adequately for a few months when they are small or recently planted. Once the roots are established, Peruvian magic trees can usually rely on rain for water. When Peruvian magic trees are planted in pots, overwatering is more common. If you accidentally overwater your tree, take immediate action to fix it. First, stop watering the plant to minimize the effects of overwatering. Then, remove the tree from the pot and examine its roots. If there is no root rot, you can place the tree back in the pot. If you do find root rot, trim affected roots and consider applying a fungicide. Finally, repot the tree in well-draining soil. On the other hand, if your Peruvian magic tree is underwatered, simply water it more frequently. Underwatering is an easy problem to fix. When the leaves droop, dry out, or fall off due to underwatering, they will quickly regain fullness after sufficient watering. Remember to adjust your watering frequency promptly when you notice underwatering symptoms.

When should I fertilize my Peruvian magic tree?

The best time to fertilize a Peruvian magic tree is in early spring when it is coming out of dormancy and starting to bloom. This will provide the tree with plenty of energy for growth and flowering. However, it is also beneficial to feed the tree again towards the end of the season in the fall, although this feeding can be smaller. Some gardeners choose to fertilize when planting the tree, but it is not always necessary.

How important is artificial lighting for indoor Peruvian Magic Trees?

Artificial lighting is vital for the growth of indoor Peruvian Magic Trees, especially when natural sunlight is limited, such as during winter or in less sunny spaces. Adequate lighting promotes faster, healthier growth. LED lights are recommended because they can provide specific wavelengths needed by plants. Full sun plants require 30-50W/sq ft, partial sun plants need 20-30W/sq ft, and full shade plants need 10-20W/sq ft of artificial light. The light source should be placed 12-36 inches above the plant, and most plants benefit from 8-12 hours of light per day to mimic natural daylight hours.

How does the Peruvian magic tree respond to cold temperatures?

The Peruvian magic tree prefers warm temperatures and does not tolerate cold well. It thrives when temperatures are maintained above 20°C, especially during the winter when it should be kept above 5°C. Exposure to temperatures below 1°C can lead to leaves lightening in color, and after frost damage, they may turn brown or black, exhibiting symptoms like wilting and drooping. To prevent cold damage, it's recommended to bring the tree indoors during autumn and place it near a bright window, away from direct heat sources, to maintain an optimal temperature above 20°C.

How frequently should I water my Peruvian magic tree?

To ensure your outdoor plants grow well, they usually rely on natural rainfall. However, if your area experiences little rainfall, it's important to provide adequate watering. During the spring and fall, watering every two weeks should suffice. In the summer, more frequent watering is necessary, while in the slow-growth winter season, watering should be reduced. Young or newly planted Peruvian magic trees require more frequent watering to help them establish and grow. Determining the watering schedule for potted plants can be done in two ways. Firstly, a predetermined schedule can be set, such as watering once a week or every other week. However, this approach may not consider the specific growing conditions for your Peruvian magic tree. Another method is to assess soil moisture. It's best to wait until the top two to four inches of soil have completely dried out before watering again. This approach may vary during the summer when the plant's water needs are higher.

When is it not a good idea to fertilize my Peruvian magic tree?

During the winter, your Peruvian magic tree is in a dormant phase and does not require fertilizer. Fertilizing during this time can lead to negative effects from overfertilization. The main feeding times for this tree are in early spring and fall, so it generally does not need fertilizer in the spring and summer months. It is also advisable to avoid fertilizing if the tree is experiencing excessively hot or dry conditions.

What are the signs of light deficiency in Peruvian Magic Trees?

Signs of light deficiency in Peruvian Magic Trees include small leaves, leggy or sparse growth, faster leaf drop, slower or no new growth, lighter-colored new leaves, chlorosis (leaves turning yellow), sunscald, leaf curling, wilting, and leaf scorching. These symptoms occur when the plant is not receiving sufficient sunlight, leading to inadequate chlorophyll and essential nutrients, which affects the plant’s ability to photosynthesize and maintain healthy growth.

What should I do if my Peruvian magic tree has been damaged by low temperatures?

If your Peruvian magic tree has suffered from frost damage, you should trim off the damaged parts to prevent further harm. Move the tree immediately indoors to a warm environment, ideally placing it near a south-facing window to ensure it gets enough sunlight. It's also important to avoid placing the plant near heaters or air conditioning vents, as this can cause the air to become excessively dry and further stress the plant.

PLATES
Cantua buxifolia leaf
PLATE 01 · leaf
Cantua buxifolia leaf
PLATE 02 · leaf
Cantua buxifolia flower
PLATE 03 · flower
Cantua buxifolia flower
PLATE 04 · flower
Cantua buxifolia habit
PLATE 05 · habit
Cantua buxifolia habit
PLATE 06 · habit