Echium vulgare — a medium houseplant
SPECIMEN · FROM THE LIBRARY
Echium vulgare

Echium Vulgare

Updated · 30,086 observations
Photo · (c) Javisa Hun, some rights reserved (CC BY-NC), uploaded by Javisa Hun COURTESY INATURALIST
A NOTE OF INTEREST

Echium vulgare, commonly known as viper's bugloss or blueweed, is a biennial or short-lived perennial plant belonging to the Boraginaceae family. Native to Europe and western Asia, it has been introduced and naturalized in many parts of the world.

The plant typically grows to a height of 1-3 feet, featuring a basal rosette of hairy, rough-textured, lance-shaped leaves. Its stem is also hairy, adorned with branching spikes of blue-purple flowers that bloom from June to September. The tubular flowers, with five petals and protruding stamens, are particularly attractive to bees and other pollinators.

Echium vulgare thrives in well-drained soils in full sun but can tolerate some shade. It often grows in disturbed areas such as roadsides, fields, meadows, pastures, waste places, or along coastal cliffs.

Although it has a frightening appearance and some intimidating common names, viper's bugloss is a cherished ornamental plant with many cultivars available. It is also a favorite among many insects, particularly bees and butterflies. FUN FACT · FROM THE LIBRARY

Historically, the plant has been used for medicinal purposes for centuries due to its anti-inflammatory properties, which can help alleviate respiratory issues such as asthma and bronchitis when consumed as a tea or tincture.

However, Echium vulgare can also be considered an invasive species due to its ability to spread rapidly through self-seeding, potentially outcompeting native plants if not properly controlled.

Overall, Echium vulgare is an attractive wildflower that provides food for pollinators and possesses medicinal properties. However, it should be monitored carefully if planted outside its native range due to its invasive potential.

THE NAME

Viper's Bugloss, also known as Common Viper's Bugloss, derives its name from a combination of Greek and Latin words. The Greek word "bou," meaning cow or ox, and the Latin word "glosso," meaning tongue, allude to the plant's leaves, which are shaped like an ox tongue. The "viper" part of its common name likely refers to the markings on the stem that resemble a snake's pattern or to the shape of the flowers, which resemble clusters of snake heads and tongues.

A note from PlantMom

Viper's bugloss has strong disease resistance and is usually not prone to illnesses. However, it can be vulnerable to pests and diseases present in its surroundings. These problems are typically not severe. Regarding care, the plant requires a moderate level of maintenance. It should be pruned regularly to preserve a good appearance and healthy growth. Fertilizing can also help encourage flowering. Viper's bugloss is appropriate for anyone with outdoor space, such as a garden or patio, and does not demand extensive care experience. It may need more attention when grown indoors.

— PlantMom
CARE GUIDE

How to keep Echium Vulgare.

Water

Viper's bugloss originates from temperate regions with well-drained soils and thrives with moderate moisture levels. To promote steady growth, it should be watered weekly, ensuring the soil remains neither too wet nor too dry. Natural rainfall helps meet its moisture needs, particularly during the active growing season when the plant produces its vibrant blooms.

Temperature

Native to temperate areas, Viper's bugloss thrives best in a temperature spectrum of 68 to 95 °F (20 to 35 ℃). If the temperature should drop below or exceed this spectrum in certain seasons, it might be essential to supply additional heating or cooling to sustain the most favorable conditions for growth.

Fertilizer

Viper's bugloss requires periodic nourishment to stimulate blooming but it isn't fond of excessive amounts. It calls for mild frequencies of fertilizer through its whole life span, particularly during the apex of active growth and its blooming period. You should continue to provide nutrients to your Viper's bugloss until its flowering period ends.

Pruning

Viper's bugloss is a resilient biennial known for its tall spikes of blue flowers. To encourage growth and flowering, prune the plant in early to late spring. Remove dead stems and spent flowers to maintain its health and extend the blooming period. Minimal intervention is ideal, as it supports the plant's natural growth habit and enhances air circulation.

Pot & Repot

When transplanting Viper's bugloss, choose a pot that's 1-2 inches (2.5–5 cm) bigger in diameter and make sure it offers sufficient drainage. Employ a potting mixture that drains well and think about incorporating perlite for added drainage. Carry out the repotting in the springtime or early summer season, then hydrate the plant adequately, and place it in a location with less sunlight at the initial stage.

CHARACTERISTICS

Botanical profile.

Plant Type
Herb
Life Cycle
Biennial, Perennial, Annual
Genus
Echium
Family
Boraginaceae
Hardiness Zone
3-9
Mature Height
25 cm to 91 cm
Mature Spread
30 cm to 61 cm
Leaf Color
Green
Leaf Type
Deciduous
Flower Color
Blue, Purple
Flower Size
1.02 cm to 2.03 cm
Bloom Time
Late spring, Early summer, Mid summer
Planting Time
Summer, Winter
Harvest Time
Early summer, Mid summer
ALSO KNOWN AS

Other names.

en Viper's bugloss en Blue echium en Blueweed en Blue thistle en Blue-devil en Common viper's bugloss en Common vipersbugloss en Common Echium en Viper’s bugloss en Vipers bugloss en Iarba șarpelui en Żmijowiec zwyczajny en Parastais Daglītis (LVL) ru Синяк
FREQUENTLY ASKED

Reader questions.

How should I water my Viper's bugloss plant?

When watering the Viper's bugloss, it's best to use filtered water at room temperature. Tap water may contain particles that can harm the plant. The Viper's bugloss prefers warm environments, so avoid using cold water, which can shock its system. Instead of overhead watering, apply filtered room temperature water directly to the soil until it's completely soaked. This helps moisten the roots and allows them to spread through the soil and absorb nutrients effectively.

Why should I use fertilizer on my Viper's bugloss?

Properly fertilizing flowering plants, such as Viper's bugloss, is crucial for robust growth and vibrant blooming. These plants are known for their prolific blooming, which means they need ample fertilizer to replenish the necessary nutrients for their growth. Nitrogen is important for promoting early season vegetative growth and maintaining green foliage through photosynthesis and chlorophyll production. Phosphorus plays a vital role in enhancing flower formation, strengthening stems, and converting sunlight into usable energy for growth. Potassium aids in water and nutrient movement, facilitating the transportation of essential substances from the roots to the shoots. Additionally, it encourages root growth and enhances the plant's ability to tolerate drought during the summer.

What are the sunlight requirements for Viper's bugloss?

Viper's bugloss requires full sun exposure, meaning it needs to receive more than 6 hours of sunlight daily to thrive optimally. It can also grow in partial sun conditions, which is about 3-6 hours of sunlight. It's important to observe how sunlight moves through your garden to find spots that provide an ideal balance of light and shade, ensuring the plant's well-being.

What is the native environment of Viper's bugloss, and what are its temperature preferences?

Viper's bugloss is native to temperate regions and thrives in a temperature range of 68 to 95°F (20 to 35°C). To ensure optimal growth, it may be necessary to provide extra heating or cooling if the temperatures fall outside this range during different seasons. The plant exhibits strong cold resistance, indicating special frost protection measures typically aren't required in winter. However, should winter temperatures are expected to fall below the limit growth temperature, providing cold protection by covering the plant with soil or straw and watering it abundantly before the first freeze to keep the soil moist is advisable. This strategy helps to prevent drought and water scarcity during the colder months and early spring.

What do I do if I give my Viper's bugloss plant too much or too little water?

The health of your Viper's bugloss can be negatively impacted by both overwatering and underwatering, but overwatering is more commonly seen. When this plant receives too much water, its stems and leaves may wilt and turn yellow. Overwatering for a prolonged period can also lead to diseases like root rot, mold, and mildew, which can be fatal for your plant. On the other hand, underwatering is less common due to the plant's drought tolerance, but it is still possible. When underwatering occurs, the leaves of your Viper's bugloss will become brittle and brown. Recognizing the signs of overwatering is crucial for taking care of your plant. Some diseases caused by overwatering, such as root rot, may not be fixable if you wait too long. If you notice early signs of overwatering, reduce your watering schedule immediately. Additionally, assess the soil quality of your Viper's bugloss. If the soil doesn't drain well, replace it with a loose, well-draining potting mix. On the other hand, if you observe signs of underwatering, simply water more regularly until the signs disappear.

When should I fertilize my Viper's bugloss plant?

Viper's bugloss enjoys a steady amount of fertilizer, but it does not want to be overloaded. Throughout its life cycle, especially during the peak periods of active growth and flowering, it benefits from light doses of fertilizer given regularly. You should continue feeding your Viper's bugloss until it stops blooming. Keep in mind that container-grown plants, due to their smaller root zone and limited access to nutrients, require more frequent fertilization compared to plants grown in the ground.

How does sun exposure affect the growth of Viper's bugloss?

Sun exposure plays a crucial role in the growth and development of Viper's bugloss. The plant thrives best in areas with abundant sunlight throughout the day. Both excessive and insufficient light can potentially harm the plant. In environments where natural sunlight is not abundant, artificial lighting can be used to supplement the plant's light requirement, with LED lights being a popular choice because they can be customized to provide specific wavelengths needed for optimal plant growth.

How does Viper's bugloss respond to low and high temperatures, and what are the solutions for each?

Viper's bugloss is cold-tolerant, doing best when the temperature remains above a minimum suitable growth temperature. During winter, it is important to keep it above a tolerable growing minimum temperature. A drop below the limit growth temperature might not show immediate effects in winter but can lead to reduced or no sprouting in spring. The solution for non-sprouting parts in spring is to remove them. In contrast, during summer, the plant should be kept below a maximum suitable growth temperature. Exceeding the tolerable growing maximum temperature can cause the leaves to lighten in color, curl, suffer from sunburn, and in severe cases, result in wilting and drying of the plant. To mitigate these issues, sunburned and dried parts should be trimmed away. Moving the plant to a shaded area or using a shade cloth during the most intense sun periods, along with watering in the mornings and evenings, are effective solutions to keep the soil moist and protect the plant.

How frequently do I need to water my Viper's bugloss plant?

If your Viper's bugloss is in a pot, the most precise way to determine if it needs watering is to check the soil. Plunge your finger into the soil and if the first two to three inches are dry, it's time to water. If you have the plant outdoors in the ground, you can use a similar method. Check the first few inches of soil and if it's dry, water the plant. Typically, during spring and early fall, watering once a week should be sufficient. However, during extremely hot weather, you may need to water twice or more per week. It's worth noting that mature and well-established Viper's bugloss plants can withstand drought well.

When is it a bad time to fertilize my Viper's bugloss?

Fertilizer can sometimes be harmful to Viper's bugloss, especially if the plant is already stressed for another reason. It is not recommended to fertilize when the plant is struggling with diseases or insect problems like aphids, spider mites, or whiteflies, as this can weaken the plant's defenses and make it more susceptible to other pest problems or disease infections. It is also important to avoid fertilizing when the soil surface has become hardened or too dry, as this can lead to fertilizer burn on the roots. Instead, it is advised to water the potting soil to make it slightly moist before applying fertilizer. Additionally, during the hottest part of the summer when Viper's bugloss goes dormant, it is best to avoid fertilizing until growth resumes.

What artificial lighting is recommended for indoor cultivation of Viper's bugloss?

When natural sunlight is insufficient for indoor cultivation of Viper's bugloss, artificial lighting becomes essential for its growth. LED lights are recommended due to their capability to mimic natural sunlight. Full sun plants need 30-50W/sq ft, partial sun plants require 20-30W/sq ft, and full shade plants should have 10-20W/sq ft of artificial light. The light source should be placed 12-36 inches above the plant, and the plants typically need 8-12 hours of light per day.

How much water does my Viper's bugloss plant need?

When watering your Viper's bugloss, don't be afraid to give it a generous amount of water. Wait until the top two to three inches of soil are dry, and then water the plant thoroughly. Make sure to add enough water to completely saturate the soil, allowing excess water to drain out of the pot's drainage holes. If you don't see any water draining, it means the plant is not getting enough water. However, be careful not to let the water accumulate inside the soil, as this can harm the plant. On the other hand, if the water doesn't drain well, it could mean that the soil is not draining properly, which is not good for the plant's health. If the plant is outdoors, it generally only needs about 1 inch of rain per week.

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