Allium cepa 'Jetset' (Elsoms)

RHS Plant Profile
onion 'Jetset'

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Herbs - Culinary Bulbs

A bulbous perennial grown as a vegetable with upright, blueish-green leaves. This F1 hybrid onion produces uniform crops of flattened globe-shaped bulbs with thick, yellow-brown skins. Ready to harvest in late summer when planted from sets in spring

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1 year
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Well–drained
pH
Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H3

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Amaryllidaceae
Native to GB/Ireland
No
Foliage
Evergreen
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
Accepted

How to Grow

Cultivation

Grow in deep, fertile soil in a sunny spot. This cultivar is suitable for short storage periods. 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

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