About
Allium cepa (Aggregatum Group) 'Longor' PBR is a bulbous perennial cultivated primarily for its culinary use. It features long, narrow grey-green leaves. The elongated French shallots possess a purple-brown skin that encases pink flesh, making them suitable for harvest from summer through autumn.
About the genus
Allium consists of bulbous herbaceous perennials characterized by a pronounced onion or garlic aroma. They feature linear, strap-like, or cylindrical leaves that arise from the base. The flowers, which can be star-shaped or bell-shaped, are arranged in an umbel atop a stem that lacks leaves.
Growing conditions
- Sunlight
- Full sun
- Soil type
- Chalk, Loam, Sand, Clay
- Soil pH
- Neutral
- Soil moisture
- Well-drained
- Aspect
- South-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H3
Plant details
- Plant type
- Herbs - Culinary, Bulbs
- Habit
- Clump forming
- Foliage
- Deciduous
- Height
- 0.1-0.5 metres
- Spread
- 0-0.1 metre
- Time to full height
- 1 year
- Suggested uses
- Patio and container plants
Care notes
- Cultivation
- Will grow well in any fertile well-drained soil in a sunny position. Can be grown in containers. Ready to harvest within 90 days when leaves turn yellow and flop over. See allium cultivation for further advice
- Pruning
- May require deadheading
- Propagation
- Propagate by seed or by onion sets. See how to grow: onions or sowing vegetable seeds
- Pest resistance
- May be susceptible to Onion fly, Onion leafminer, Leak moth
- Disease resistance
- May be susceptible to downy mildew, white rot