Amphilophium buccinatorium
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Amphilophium buccinatorium

Blood-Trumpet · Mexican blood-flower · Mexican blood-trumpet · Blood trumpetvine · Blood-red trumpet-creeper

Tier 1 Difficulty: easy Water: low Light: full_sun
Water every
7 days
Temperature
20–37 °C
Soil pH
6–7
Hardiness
Zone 9–12
Click count
174
Observations
210

Description

Source: leafsnap

Amphilophium buccinatorium, commonly known as the trumpet vine or cow itch vine, is a fast-growing woody vine belonging to the Bignoniaceae family. Native to Central and South America, it has been introduced as an ornamental plant in many regions worldwide. This vine features a thick stem, capable of growing up to 10 cm in diameter, and can climb to heights of 30 meters with the assistance of aerial roots. The leaves are compound, with ovate leaflets measuring about 5–10 cm in length and having serrated edges. The trumpet-shaped flowers are orange-red and bloom in clusters at the ends of branches during the summer. Amphilophium buccinatorium prefers full sun or partial shade and well-drained soil, although it can accommodate a variety of soil types, including sandy, loamy, and clay soils. Once established, it is drought-tolerant but requires regular watering during its first year of growth. The plant's bright flowers attract hummingbirds, which feed on the nectar, while its leaves serve as food for caterpillars of certain butterfly species, such as the Gulf Fritillary (Agraulis vanillae). While Amphilophium buccinatorium is prized for its beautiful flowers and rapid growth, it should be planted with caution. If not properly managed, it can become invasive, especially near natural areas where it may outcompete native plants for resources such as light, water, and nutrients.

Care Guide

💧 Water Every 7 days

The Mexican blood-flower vine thrives in high humidity and moist conditions similar to its tropical rainforest environment. To prevent root saturation, water it every three weeks. This evergreen plant's ability to retain water depends on its dense foliage, which helps it withstand dry periods efficiently.

Suggested frequency: Every 7 days
FAQ
How should I water my Mexican blood-flower vine?

To promote excellent root development, consider using a garden hose at the base of the plant. Avoid spraying the leaves directly, as this can lead to more watering needs, especially when the plant is outdoors and exposed to direct sunlight. You can also use bubblers or soaker hoses to keep the roots moist, covering the entire garden or bed if necessary for adding or removing plants. Make sure to drain any excess water and allow the soil to dry before watering again. To prevent diseases, water at ground level instead of spraying the leaves. On sunny days, it may be beneficial to spray the entire bush with water. Whether the Mexican blood-flower vine is potted or in-ground, it prefers deep watering rather than light sprinkling.

If I give too much or too little water to a Mexican blood-flower vine, what should I do?

If a Mexican blood-flower vine is overwatered, its leaves may turn yellow, drop off, and wilt. The plant may also appear dull and unhealthy, with mushy stems. When these signs start to appear, it's best to adjust your watering schedule. Wilting can also indicate under watering, with leaves becoming crispy and dry. If the soil is dry and simply watering is not enough, give the plant a thorough watering. This will help the Mexican blood-flower vine recover, though it may still have dry and yellow leaves due to root damage. Once the plant returns to normal, the yellowing of leaves will stop. Indoors, always check the moisture levels of the pot for the Mexican blood-flower vine. Avoid overwatering and look for signs of black spots, in which case allow the soil to dry out by withholding watering for a few days. Overwatering can lead to root rot, so if you observe discolored and slimy roots, consider transferring the plant to a different pot. Preventing root rot by avoiding overly soggy soil is crucial. When planting a Mexican blood-flower vine outdoors, dig a little deeper and if you find the soil too dry, ensure you adequately water the plant for its recovery.

How often should I water my Mexican blood-flower vine?

To ensure the healthy growth of Mexican blood-flower vines, here are some watering guidelines. When they are in pots, it's best to water them deeply instead of frequently. Soak them with one gallon of water at a time, as the limited water storage in pots causes the soil to dry out faster. In cold regions, water every 3 to 5 days. Water the plants early in the morning when the soil is dry, both indoors and outdoors. To determine if watering is needed, check the soil. If the top 2-3 inches are dry, give the plant a thorough watering. On hot days, check the moisture level daily, as the heat can quickly dry out potted soil. For gardens, irrigation is required. In hot climates, water once a week when the top 2-3 inches of soil are dry. Be mindful of any rainwater on the plants to avoid overwatering and root rot. Mexican blood-flower vines thrive in spring and fall. When planted outdoors, apply mulch 3 to 4 inches deep to conserve water. Sandy soil drains faster, so water more frequently. Clay soil requires less frequent watering, around every 2-3 days, to prevent root rot. Keep track of waterings on a calendar and pay attention to drooping leaves, which may indicate the need for watering.

How much water does my Mexican blood-flower vine need?

The Mexican blood-flower vine generally needs about a gallon of water on a regular schedule. For potted plants, water them deeply until water starts to drip from the bottom of the pot. Wait for the soil to dry before watering again. You can use a water calculator or moisture meter to determine how much water you've given your plant each week. During the flowering period, provide plenty of water, but let the moisture evaporate to prevent root rot. If the Mexican blood-flower vine is planted outdoors where there is enough rainfall, it may not need extra watering. When the vine is young or newly planted, make sure it receives 1-2 inches of rain per week. As the vine grows, it can rely on rainfall alone. Only water it fully during cooler times of the day if the weather is too hot or if there is no rain for 2-3 weeks to prevent heat damage. Additional watering will be needed during extended dry spells.

Should I change how often I water my Mexican blood-flower vine depending on the time of year or the weather?

The Mexican blood-flower vine requires outdoor conditions with rain, but may need watering during persistent dry weather. To ensure proper growth throughout the spring and fall, the soil should be kept moist but not soggy, alternating between dry and moist soil conditions. In the summer, hot weather can cause water to evaporate quickly, so more frequent watering may be needed if there is a lack of rainfall. During the winter, less water is generally required as the vine drops its leaves and goes dormant. Using a well-draining soil mixture, such as terracotta, can help water evaporate faster in winter. Once the vine begins to leaf out and go dormant, no watering is necessary, as it can rely on fall and winter rains to survive. Good drainage is crucial at all times, especially in winter, to prevent ponding or drought. If the vine is in a pot, it has limited root growth and should be well-watered, particularly in summer. Deep soaking the entire root system once or twice a week, depending on the weather, is recommended, avoiding shallow sprinkles that can promote fungal growth. Even during dormancy in the fall or winter, the vine should not be allowed to completely dry out. Overwatering should be avoided, as the vine does not like sitting in water for too long, which can lead to winter damage. Applying mulch can help reduce stress, conserve water, and promote healthy blooms.

☀️ Light Full sun

The Mexican blood-flower vine is native to open habitats, for example sunny meadows and forest edges, which receive abundant light. It performs best in Full Sun but can tolerate Partial Sun, adapting well to a range of sunlight conditions.

Ideal: Full sun
FAQ
What are the sunlight requirements for Mexican blood-flower vine?

The Mexican blood-flower vine (Amphilophium buccinatorium) thrives in environments that provide ample light, originating from open areas such as sunny meadows and forest edges. It prefers full sun conditions, which is defined as receiving above 6 hours of sunlight daily, but can also tolerate partial sun, meaning about 3-6 hours of sunlight. It's important to observe how sunlight moves through your garden to find spots that offer a perfect balance of light and shade, ensuring the plant's well-being and happiness.

How can artificial lighting be used for Mexican blood-flower vines?

When natural sunlight is inadequate, especially in winter or less sunny spaces, artificial lighting becomes essential for the growth of indoor plants like the Mexican blood-flower vine. Adequate lighting supports optimal growth, with LED lights being a popular choice due to their ability to provide specific wavelengths required by plants. Full sun plants need 30-50W/sq ft, partial sun plants require 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 to mimic natural sunlight, ensuring plants receive 8-12 hours of light daily.

What are the symptoms of light deficiency in Mexican blood-flower vines?

Symptoms of light deficiency in Mexican blood-flower vines include smaller new leaves, leggy or sparse growth, faster leaf drop, slower or no new growth, lighter-colored new leaves indicating a lack of chlorophyll and essential nutrients, chlorosis (leaves turning yellow), sunscald characterized by pale or necrotic areas on the plant, leaf curling as a defense against excessive sunlight, wilting due to increased water loss, and leaf scorching with brown, dry edges on leaves. These symptoms showcase the plant's struggle in suboptimal light conditions.

How can you address light deficiency in Mexican blood-flower vines?

To address light deficiency in Mexican blood-flower vines, consider gradually moving them to sunnier locations to receive at least 6 hours of direct sunlight daily. For indoor plants, use south-facing windows or professional grow lights to ensure ample light exposure. Outdoors, avoid sudden changes in light intensity to prevent sunburn. Reducing obstructions and, if feasible, transplanting smaller plants during their dormant period to sunny spots with good drainage can significantly improve sunlight access. Note that parts of the plant affected by insufficient sunlight may not recover, but new growth should be healthy with increased light exposure.

🌡️ Temperature 20–37.8°C

The Mexican blood-flower vine comes from tropical areas where the climate is generally warm and humid. Consequently, it is well suited to high temperatures and humidity. It does not tolerate sudden temperature changes and prefers a steady temperature environment, so avoiding temperature fluctuations indoors is important. It typically cannot withstand cold temperatures and needs higher temperatures to grow. If the surrounding temperature drops too low, the plant may stop growing or even die.

Ideal temperature: 20–37.8°C
💨 Humidity
Humidity:
🪴 Soil 6-7
Soil pH: 6-7
🌱 Fertilizer

The best time to fertilize a Mexican blood-flower vine is in early spring, when it emerges from dormancy. This encourages overall growth and flower development. Fertilizing improves the foliage, stems, and branches, and promotes large, vibrant, long-lasting flowers. It helps move nutrients from the roots to the flowers and enhances the plant's health and resistance to disease.

🪴 Pot & Repot Every 12 months
Suggested frequency: Every 12 months
✂️ Pruning

The Mexican blood-flower vine is known for its trumpet-shaped flowers and benefits greatly from pruning in early spring. To promote growth and maintain the shape of the plant, trim any dead or overgrown stems. Additionally, removing spent flowers will not only prolong blooming but also improve air circulation, which helps ensure a healthy structure and prevent disease.

🌿 Propagating
🐛 Diseases & pets
☠️ Toxicity

Characteristics

Plant Type
Vine
Life Cycle
Perennial
Genus
Amphilophium
Family
Bignoniaceae
Hardiness Zone
9-12
Mature Height
11.89 m
Mature Spread
9.14 m
Leaf Color
Green
Leaf Type
Evergreen
Flower Color
Purple
Flower Size
7.62 cm to 10.16 cm
Bloom Time
Summer, Early fall, Mid fall
Planting Time
Spring, Summer
Harvest Time
Fall, Early winter, Mid winter
Native Area
Mexico, Guatemala

Tags (7)

Common Names (12)

en Blood-Trumpet
en Mexican blood-flower
en Mexican blood-trumpet
en Blood trumpetvine
en Blood-red trumpet-creeper
en Cherere
en Scarlet trumpet vine
en Blood-red trumpet vine
en Mexican trumpet vine
en Blood-red trumpet creeper
en Red trumpet vine
en Gleeson