species
Allium fistulosum
Welsh onion · Spring onion · Bunching onion
Scale drawing from this record, beside a 1.7 m figure.
Allium fistulosum is a perennial in the family Amaryllidaceae, also known as Welsh onion, Spring onion or Bunching onion, introduced to the UK. It reaches 60 cm tall and 20 cm across in about 10 years. It grows in full sun, on loam, clay or sand soil, where the ground is neutral or alkaline and in well drained conditions, and suits average positions. It flowers from June to July. Its RHS hardiness rating is H5 (hardy, cold winter): −15 to −10°C.
Assembled from the attributes recorded below.
What this plant needs
- Size at maturity
- 60 cm tall × 20 cm across, after about 10 years
- Hardiness
- H5 (RHS)
- Lifecycle
- Perennial
- Aspect
- Full sun
- Soil
- Loam, Clay, Sand
- Acidity
- Neutral, Alkaline
- Moisture
- Well drained
- Exposure
- Average
- In the UK
- Introduced
When it flowers
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
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