species
Allium cepa
Onion · Onion plant
Photo: Mehdi · CC BY-SA 3.0 · via Wikimedia Commons
Allium cepa belongs to the family Amaryllidaceae, also known as Onion or Onion plant, introduced before 1500 and long since part of the landscape. It reaches 40 cm tall and 40 cm across. It grows in full sun or part shade, where the ground is neutral and in well drained conditions. It flowers in August. Its RHS hardiness rating is H4 (hardy): −10 to −5°C.
Assembled from the attributes recorded below.
What this plant needs
- Size at maturity
- 40 cm tall × 40 cm across
- Hardiness
- H4 (RHS)
- Aspect
- Full sun, Part shade
- Acidity
- Neutral
- Moisture
- Well drained
- In the UK
- Archaeophyte (pre-1500)
When it flowers
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
Plan a bed with Allium cepa
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