Dracunculus vulgaris
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Dracunculus vulgaris

Dragon Lily · Dragon arum · Devil's-tongue · Common dracunculus · Arum Arrowroot

Tier 1 Difficulty: medium Water: low Light: full_sun Toxicity: high
Water every
7 days
Temperature
15–35 °C
Soil pH
6–7
Hardiness
Zone 5–10
Click count
434
Observations
1,360

Description

Source: leafsnap

Dracunculus vulgaris, commonly known as the Dragon Arum or Voodoo Lily, is a unique and fascinating plant from the Araceae family. Native to the Mediterranean region, it thrives in rocky areas, woodlands, and along riverbanks. This plant boasts a distinctive appearance with its large green leaves, which can grow up to 3 feet long. Its flowers are particularly striking, with a deep purple hue and an impressive size of up to 2 feet tall. Notably, the flowers emit a strong odor, often compared to the smell of rotting meat or garbage. This scent attracts flies, which are essential for pollinating the plant. One intriguing feature of the Dragon Arum is its ability to generate heat, aiding in the attraction of pollinators even in cooler temperatures. This heat generation occurs through a process called thermogenesis, where specialized cells within the flower produce heat through metabolic activities. Although its strong odor may not appeal to everyone, Dracunculus vulgaris is a captivating choice for garden enthusiasts seeking something unique and exotic. To thrive, the plant requires well-draining soil rich in organic matter and prefers partial shade or filtered sunlight.

🌳 Aside from its striking appearance, dragon arum has a remarkable ability to signal heavy metal contamination in the soil. This trait arises from its natural tendency to accumulate certain metals in its tissues, which has led to it being studied in phytoremediation research. Its potential as an environmental indicator and its role in bioremediating polluted soils are lesser-known but important aspects of the plant, indicating its potential use in ecological management and conservation.

Care Guide

💧 Water Every 7 days

The Dragon Arum comes from the Mediterranean region and prefers moderate moisture without waterlogging. It's drought-tolerant and does best with weekly watering to maintain its health. During its growing season, this outdoor plant particularly thrives on rainwater, which helps enhance the appearance of its foliage and flowers.

Suggested frequency: Every 7 days
FAQ
How should I water my Dragon arum plant?

To ensure your Dragon arum gets enough water, there are several options available. If you have a small potted plant indoors, you can easily bring it to your kitchen sink and use the faucet to add water. Simply hold the pot and stop watering when you see the water running through the drainage holes. However, avoid doing this during the winter or in cold climates as it can harm the plant's roots. In most cases, using tap water is fine, but if your local tap water has high levels of fluorine, chlorine, or salts, it's best to consider using rainwater or lake water instead. Additionally, overhead watering or watering directly into the soil with a watering can, hose, or any other tool can also work well for the Dragon arum.

What do I do if I give my Dragon arum plant too much or too little water?

If you realize that your Dragon arum is not getting enough water, the first thing you should do is give it some water. Make sure to water it deeply until water starts coming out of the drainage hole if it's in a container, or until the soil is completely moist if it's growing outside. On the other hand, if your Dragon arum is getting too much water, start by watering it less frequently. Additionally, you should take a look at the soil and container it is in. If the soil doesn't drain well or the container doesn't have proper drainage, your plant will likely be overwatered again. To fix this, consider using looser soil or a container with bigger drainage holes or a more porous material. Also, check the plant's location. If it's in a corner, it's recommended to move it to a place with better ventilation, like near a window or around a door. Ensuring good air circulation can help prevent overwatering to some extent.

How often do I need to water my Dragon arum?

The Dragon arum does not need constantly moist soil. It is actually better to let the soil dry out between waterings. If you are growing Dragon arums in containers, you can tell when to water by checking the dryness of the soil in the container. If about half of the soil is dry, it is time to water. You can check by feeling the soil with your fingers or using a soil moisture meter. For those growing the Dragon arum outside, you can plan to water it about once every other week, unless it has rained recently.

How much water does my Dragon arum plant need?

When the top half of the soil surrounding your Dragon arum's root becomes dry, it's time to add water to moisten it again. The amount of water needed depends on the container size and the plant's size. For a small Dragon arum in a small to medium-sized container, one to two cups of water should be enough. Adjust the water volume accordingly for larger plants. To ensure your plant is properly hydrated, you can check the moisture level by inserting your finger or a trowel into the soil. Another method is to water the plant until you see excess water draining from the bottom holes of the container.

How can I know if I am watering my Dragon arum plant enough?

Both overwatering and underwatering are harmful to the health of your Dragon arum. However, they have distinct signs when they occur. Insufficient watering can cause yellow leaves and lead to browning and brittleness at the leaf margins. On the other hand, excessive watering results in yellow and brown marks appearing on the leaves simultaneously. Overwatering can even result in diseases like root rot, which may be visible on your plant. Nonetheless, if you are familiar with the signs of overwatering and underwatering, you have a good chance of addressing both problems effectively.

☀️ Light Full sun

Dragon arum strongly prefers a day of full sunlight and can tolerate periods of partial shade. Its native habitat is similar, which supports its growth and health. However, both too much and too little sunlight can adversely affect its growth.

Ideal: Full sun
FAQ
What are the sunlight requirements for Dragon arum?

Dragon arum thrives best in environments that replicate its native habitat, which involves being exposed to full sun for more than 6 hours a day but can also tolerate partial sun, approximately 3-6 hours of sunlight daily. It's essential to observe the movement of sunlight through your garden to find the ideal balance of light and shade that ensures the wellbeing of your Dragon arum.

How does insufficient or excessive sunlight affect Dragon arum?

Experiencing either too much or too little sunlight can adversely affect Dragon arum's growth. Symptoms of light deficiency include smaller new leaves, leggy or sparse growth, faster leaf drop, slower or no new growth, lighter-colored new leaves, chlorosis, sunscald, leaf curling, wilting, and leaf scorching. These indicate the plant is not receiving the optimal sunlight it needs for photosynthesis and overall health.

How can artificial lighting be utilized for Dragon arum indoors?

When natural sunlight is insufficient, especially during winter or in less sunny indoor spaces, artificial lighting provides an essential alternative for Dragon arum. It's recommended to use LED lights that can be customized to the specific light wavelengths needed by the plant. Full sun plants require 30-50W/sq ft, partial sun plants 20-30W/sq ft, and full shade plants 10-20W/sq ft of artificial light. The lights should be placed 12-36 inches above the plant and kept on for 8-12 hours per day to mimic natural daylight conditions and promote healthy growth.

What are the solutions for Dragon arum experiencing insufficient sunlight?

For indoor Dragon arum plants, gradually moving them to sunnier spots where they can get at least 6 hours of direct sunlight daily is recommended. Using a south-facing window and keeping curtains open during the day maximizes sunlight exposure. If the plant is too large or not easily movable, consider using artificial lighting, such as desk or ceiling lamps, for at least 8 hours daily or investing in professional plant grow lights. For outdoor Dragon arums, also move them gradually to sunnier locations to prevent sunburn, while ensuring they do not experience drastic changes in light intensity. Additionally, if sunlight is obstructed by vegetation, pruning trees that block sunlight or transplanting the plant during its dormant period to a location with better light and drainage may help improve its health.

🌡️ Temperature 15–35°C

The dragon arum's native growing environment requires a moderate temperature range of about 59 to 86 °F (15 to 30 °C). It prefers temperatures of 59 to 95 °F (15 to 35 °C). For optimal growth in different seasons, maintain 50 to 77 °F (10 to 25 °C) in winter and 68 to 95 °F (20 to 35 °C) in summer.

Ideal temperature: 15–35°C
FAQ
What are the ideal growing conditions for Dragon Arum?

The Dragon Arum, or Dracunculus vulgaris, thrives in a moderate temperature range, ideally between 59 to 86°F (15 to 30°C), but it can tolerate temperatures from 59 to 95°F (15 to 35°C). Seasonally, it's recommended to maintain temperatures of 50 to 77°F (10 to 25°C) in winter and 68 to 95°F (20 to 35°C) in summer for optimal growth. Dragon arum has strong cold resistance, therefore special frost protection measures are not generally needed. However, if temperatures are expected to drop below the plant's cold tolerance, providing protection by covering the plant with soil or straw is advisable. To prepare for winter, watering the plant abundantly before the first freeze, ensuring the soil remains moist, is recommended. This practice helps prevent drought and water scarcity for the plant during the colder seasons.

How does low temperature affect the Dragon Arum and what are the solutions?

Dragon Arum is cold-tolerant and performs best at temperatures above its minimum suitable growth temperature. In winter, it is vital to keep it above its tolerable growing minimum temperature. If temperatures fall below its growth limit, there won't be visible changes during the winter, but there might be a decreased sprouting or no sprouting at all come spring. In such cases, the solution is to remove any parts of the plant that have failed to sprout in the spring.

What should I do if the Dragon Arum experiences high temperatures?

During the summer months, it's essential to ensure that the Dragon Arum's surrounding temperature does not exceed its maximum suitable growth temperature. If the temperature climbs beyond its tolerable maximum, the plant may exhibit signs of stress such as leaves becoming lighter in color, curling, being prone to sunburn, and in severe cases, the entire plant might wilt and dry out. To mitigate these impacts, trim away the sunburned and dried-up parts. Relocate the plant to an area with more shade, especially from the midday and afternoon sun, or use a shade cloth to protect it. Additionally, watering the plant in the morning and evening can help keep the soil moist, which is crucial in preventing heat stress.

💨 Humidity
Humidity:
🪴 Soil 6-7
Soil pH: 6-7
🌱 Fertilizer

A single fertilizer application in spring is generally enough for Dragon arum, though multiple feedings can maximize growth. Fertilize every month to a month and a half. Fertilization improves the leaves’ appearance and function, helping maintain even color and a healthy texture. It also encourages root development and nutrient uptake, supporting long-term plant health.

FAQ
Why is it necessary to fertilize my Dragon arum?

The Dragon arum relies on its leaves for its main structure. Fertilization plays a crucial role in maintaining the health and appearance of these leaves. By properly fertilizing, you can ensure that the Dragon arum has vibrant, consistent color and a healthy texture. Additionally, fertilization benefits the plant below the soil's surface by promoting the growth of new roots and sustaining existing ones. This not only keeps the plant healthy in the present, but also improves its ability to absorb soil nutrients in the future.

When should I fertilize my Dragon arum plant?

To maximize the growth of your Dragon arum, you can fertilize it multiple times throughout the spring and early summer. When the leaves begin to emerge in early spring, it's a sign that it's time to start fertilizing for the year. While a single application of fertilizer is usually enough for the plant to thrive, you can feed your Dragon arum about once every month to a month and a half if you want to optimize its growth.

When is it best to not give fertilizers to my Dragon arum?

During the late fall and winter, your Dragon arum goes into a dormant phase and stops producing new growth. During this time, it's best to avoid fertilizing it. In the spring and summer, if you choose to fertilize, start decreasing the amount as summer approaches because the growth rate of your Dragon arum will also slow down. Avoid fertilizing your Dragon arum when the weather is unusually hot or the soil is very dry as it can cause stress and lead to premature death.

What kind of fertilizer does my Dragon arum plant need?

Choosing the right fertilizer for a Dragon arum is an easy task. These plants thrive on a general-purpose garden fertilizer with equal amounts of nitrogen, phosphorus, and potassium, like a 10-10-10 ratio. Avoid fertilizers high in nitrogen. The best fertilizers for Dragon arums usually come in granular form and should be slow-release. They are simple to apply to the soil. Additionally, organic soil amendments such as compost are beneficial for feeding your Dragon arum.

How can I give nutrients to my Dragon arum?

To support the growth of your Dragon arum, follow these steps: - Wait until early spring when you see the first leaves emerging from the soil. - At this point, apply a balanced formula slow-release fertilizer to the soil around the base of the plant. - If desired, repeat this process later in the season. - When applying fertilizer, make sure to target the soil rather than the plant itself. - You may need to move leaves aside to access the soil above the roots. - Additionally, consider watering the Dragon arum before and after fertilizing for optimal results.

🪴 Pot & Repot Once a year

Repot Dragon arum in spring or summer when it’s warm enough, picking a slightly larger pot with good drainage. Water thoroughly after repotting, and place it in a bright spot with indirect light. Consider using a moss pole for support as the plant grows.

Suggested frequency: Once a year
✂️ Pruning

To help your dragon arum thrive, it requires careful pruning. Begin by removing any dead leaves in early spring. Then, in late spring, lightly trim the plant to manage its size. Be sure to use sterilized tools to prevent the spread of disease. Proper pruning not only enhances air circulation but also encourages strong flowering, improving the plant’s appearance and vibrancy.

🌿 Propagating
🐛 Diseases & pets
☠️ Toxicity

Characteristics

Plant Type
Herb
Life Cycle
Perennial
Genus
Dracunculus
Family
Araceae
Hardiness Zone
7-10
Mature Height
61 cm to 91 cm
Mature Spread
91 cm
Leaf Color
Green, Silver
Leaf Type
Deciduous
Flower Color
Purple, Red, Black
Flower Size
30.48 cm
Bloom Time
Late spring, Early summer
Planting Time
Spring
Harvest Time
Early summer, Mid summer
Native Area
Turkey, Italy, Serbia, Montenegro, Bulgaria, Albania, Algeria, Greece, Croatia, Slovenia, France

Tags (13)

Common Names (9)

en Dragon Lily
en Dragon arum
en Devil's-tongue
en Common dracunculus
en Arum Arrowroot
en Earth penis
en Voodoo Lily
en Black Arum
en Dragonwort