Allium cepa 'Autumn Gold Improved'
onion 'Autumn Gold Improved'
A bulbous perennial grown as a vegetable with upright, blueish-green leaves. Produces smooth, rounded white bulbs to around 8cm diameter, covered in a pale brown skin. Ready to harvest in late summer or early autumn.
Size
Ultimate height
0.1–0.5 metresTime to ultimate height
1 yearUltimate spread
0–0.1 metreGrowing conditions
Moisture
Well–drainedpH
Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Blue Green | |||
|---|---|---|---|---|
| Summer | Blue Green | |||
| Autumn | ||||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered Hardiness
H3Botanical details
- Family
- Amaryllidaceae
- Native to GB / Ireland
- No
- Foliage
- Deciduous
- Habit
- Clump forming
- Genus
Allium are bulbous herbaceous perennials with a strong onion or garlic scent, linear, strap-shaped or cylindrical basal leaves and star-shaped or bell-shaped flowers in an umbel on a leafless stem
- Name status
Not established
How to grow
Cultivation
Grow in deep, fertile soil in a sunny spot. This cultivar has some resistance to bolting. See the RHS A-Z guide to vegetable cultivation for more detailed advice
Propagation
Propagate by seed or by onion sets. See how to grow: onions or sowing vegetable seeds
Suggested planting locations and garden types
Pruning
No pruning required, foliage will yellow and topple over when ready to harvest
Pests
May be susceptible to onion fly, allium leaf miner, leek moth and stem and bulb eelworm
Diseases
May be susceptible to onion white rot, leek rust and onion downy mildew
Get involved
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.