species
Allium giganteum
Giant allium
Scale drawing from this record, beside a 1.7 m figure.
Allium giganteum is a perennial in the family Amaryllidaceae, also known as Giant allium, introduced to the UK. It reaches 1.5 m tall and 30 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
- 1.5 m tall × 30 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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