About
Allium cepa (Cepa Group) 'Redspark' is a consistent, medium-sized annual vegetable that yields rounded bulbs featuring a rich deep red exterior and promising internal coloration. This variety demonstrates strong resistance to mildew and has excellent storage capabilities.
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
- Clay, Loam, Sand
- Soil pH
- Neutral
- Soil moisture
- Well-drained
- Aspect
- West-facing, South-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
- 0.1-0.5 metres
- Time to full height
- 1 year
Care notes
- Cultivation
- Grow in fertile, moist but well drained soil, in full sun, in a sheltered site. See Vegetable Cultivation
- Pruning
- No pruning required
- Propagation
- Propagate by seed. See sowing vegetable seeds
- Pest resistance
- Birds may be a problem when young, cover with fleece until sets have rooted in
- Disease resistance
- May be susceptible to onion white rot and leek rust