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Viburnum

Viburnum spp.

Identified By Marcs

Viburnum is an extensive genus of about 150 to 175 species of flowering shrubs or small trees in the family Adoxaceae. They are widely appreciated in landscaping for their showy clusters of white or pink flowers, attractive foliage, and often vibrant autumn colors followed by clusters of berries that attract wildlife. Most species are remarkably hardy, adaptable to various soil types, and relatively easy to cultivate in temperate garden settings. They serve wonderfully as hedges, specimen plants, or mixed shrub borders, offering seasonal interest throughout the entire year from spring blooms to winter structure.

Also known as: Arrowwood Guelder Rose Wayfaring Tree

Toxicity & Safety

Is Viburnum toxic to pets?

Yes, toxic to pets.

Viburnum plants, particularly their berries, foliage, and bark, can be toxic to domestic pets such as dogs and cats if ingested in large quantities. Ingestion commonly leads to gastrointestinal upset, including symptoms like vomiting, excessive drooling, abdominal pain, and diarrhea. While most cases are mild and resolve on their own, it is best to keep pets away from the shrubs and consult a veterinarian immediately if significant consumption occurs to ensure proper monitoring and supportive care.

Is Viburnum toxic to humans?

Yes, toxic to humans.

Certain species of Viburnum produce berries and foliage that contain mild toxins, saponins, or glycosides which can be harmful if consumed raw or in large quantities. Eating the raw fruits of many viburnum species often results in gastrointestinal distress, stomach cramps, nausea, and vomiting. Some traditional preparations involve cooking the fruit to break down these irritating compounds, but raw consumption by children or adults should be strictly avoided to prevent poisoning symptoms.

Is Viburnum safe during pregnancy?

Caution advised during pregnancy.

Pregnant and breastfeeding individuals should exercise extreme caution around Viburnum species, particularly those traditionally used for herbal preparations like bark extracts, due to a lack of sufficient clinical safety data. Some historical and traditional uses of certain viburnum barks involved uterine stimulation or muscle relaxation, which could theoretically pose risks of complications during pregnancy. Consequently, internal consumption of any part of the plant during pregnancy should be avoided unless explicitly approved by a qualified medical professional.

Growth & Dimensions

Height 100 - 400 cm
Width 100 - 300 cm
Growth Rate Moderate
Care Level Easy
Lifespan Perennial

Ideal Environment

Temperature -25°C - 35°C
Sunlight Hours 4 - 8 hrs/day
Sun Exposure Partial shade
Soil pH 5.5 - 7.5
Watering Interval 7 - 14 days
Humidity 40.00% - 80.00%
USDA Zone 4 - 8

Temperate Northern Hemisphere

Climate: Cool to moderate temperate climates with distinct seasonal changes and adequate rainfall.

Soils: Clay Loam Sand
Annual Rainfall: 700 - 1500 mm

Native Regions

North America
Europe
Asia

How to Care for Viburnum

How should I handle watering?

Water deeply and regularly during the first growing season to establish a deep root system. Once established, viburnums are moderately drought tolerant, though they appreciate weekly watering during extended dry spells.

How should I handle sunlight?

Plant in full sun to partial shade. While they tolerate partial shade well, flowering and autumn color are generally more vibrant when they receive at least 6 hours of direct sunlight daily.

How should I handle soil and fertilizer?

Thrives in rich, well-draining loam with a neutral to slightly acidic pH. Apply a balanced, slow-release fertilizer in early spring just as new growth begins.

How should I handle pruning?

Prune immediately after flowering finishes in late spring or early summer, as flower buds for the next season are set during summer. Remove dead, diseased, or crossing branches to maintain shape.

How to Propagate Viburnum

How to propagate Viburnum by cutting?

Take semi-hardwood cuttings in mid-summer, treat with rooting hormone, and place in a well-draining propagating medium.

How to propagate Viburnum by seed?

Sow fresh seeds in containers; they often require cold stratification for several months before germination occurs.

Common Diseases & Pests of Viburnum

What is Viburnum Leaf Beetle and how is it treated?

Pest
Symptoms:

Larvae and adults skeletonize the leaves, chewing away tissue between the veins.

Treatment:

Apply insecticidal soaps or neem oil to larvae in spring, or prune out infested twigs with egg sites in winter.

Prevention:

Inspect plants regularly in spring and encourage beneficial predatory insects in the garden.

What is Powdery Mildew and how is it treated?

Fungal
Symptoms:

White powdery growth appearing on the upper and lower surfaces of leaves.

Treatment:

Spray with a potassium bicarbonate-based fungicide or neem oil at the first sign of infection.

Prevention:

Ensure proper spacing between shrubs to allow good air circulation and avoid overhead watering.

Properties & Benefits of Viburnum

Bears Fruit

Uses & Health Benefits

What are the benefits of ornamental and wildlife value in Viburnum?

Provides immense ecological value by supporting local bird populations with nesting sites and food, while enhancing human mental well-being through aesthetic garden design.

Key Nutrients / Compounds

Antioxidants moderate Present in berries

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