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Welsh onion
Also known as: Bunching onion, Spring onion
Welsh onion (Allium fistulosum) is cultivated for its onion-flavored leaves, which are used like scallions. Originally from Asia, it was brought to Europe in the 17th century and has now naturalized in various parts of North America, including Canada, Alaska and areas of the northern United States.
Scientific classification
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Perennial
Lifespan
30 cm to 91 cm
Plant Height
10 cm
Spread
Green
Leaf Color
2.5 cm
Flower Size
White, Yellow, Cream
Flower Color
Green
Stem Color
Semi-evergreen
Leaf type
5 - 35 ℃
Ideal Temperature

Images of Welsh onion

Distribution of Welsh onion

Distribution Map
Welsh onion is indigenous to parts of East Asia and has been introduced to numerous regions across temperate and tropical zones. It thrives in diversified environments, with a presence established on continents such as Europe, North America, and parts of Southeast Asia. This perennial plant is also cultivated widely, indicating its successful adaptation beyond its native range.
Native
Cultivated
Invasive
Introduced
No species reported
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Habitat
Cultivated Beds
Hemisphere Trend Curve
Flowering
Fruiting

Culture

Symbolism
Protection, Exorcism, Healing
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Toxicity

Welsh onion poses mild toxicity to cats and dogs when ingested or contacted. Cats may show distress or illness requiring prompt veterinary care, while dogs can experience gastrointestinal upset, potentially more severe reactions based on the amount consumed. Immediate veterinary attention is crucial for both pets if welsh onion is ingested to ensure proper treatment and mitigate poisoning effects.
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RELATED: Toxicity of Welsh onion

Care Guide for Welsh onion

Every week
Water
Full sun
Sunlight
5 - 35 ℃
Ideal Temperature
Garden Soil
Soil Type
Water: Originating from temperate regions, welsh onion prefers consistent soil moisture and benefits from weekly watering. While it can tolerate brief dry spells, aligning its watering with local precipitation patterns is essential for its health during growth cycles.
Fertilize: Fertilize welsh onion every 2-4 weeks during the growing season using high nitrogen fertilizers for optimal growth. Use balanced, slow-release options, applying at recommended rates. Reduce frequency in dormant months, ensuring even distribution and thorough watering to aid nutrient absorption and prevent root burn.
Pruning: Welsh onion has hollow, tubular leaves and requires regular pruning for optimal growth. Prune in early to late spring, trimming leaves to about 2 inches above the soil to enhance air circulation and prevent overcrowding. This process increases yield and maintains plant vigor.
Propagation: To propagate welsh onion, sow seeds shallowly in well-drained, fertile soil and ensure proper spacing. Maintain consistent moisture for strong roots, and thin seedlings for air circulation. Regularly divide clumps to encourage growth and manageability, resulting in a rewarding addition to your garden.
Repotting: Welsh onion requires excellent drainage in pots to thrive, ensuring healthier growth and preventing root rot.
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