×
To buy, sell or swap plants and use our full service please log in or sign up – GreenPlantSwap is completely free!
Record your plants before you lose the plant labels! Just tick the ‘Garden’ box (below) on each plant. Learn more

Allium cepa ‘Showmaster’

Onion

Garden

Wishlist

  • Plant Placeholder

Features

  • BloomsMay to July
  • Height0.3m to 0.45m
  • Spread0.3m to 0.5m
  • Growth HabitRosette
  • Flower ColourWhite, purple
  • Leaf ColourBlueish green, mid green

Description

Allium cepa ‘Showmaster’ (Onion). This variety can produce very large onions which are pale yellow and have a sweet taste.

Characteristics

Biennial, Deciduous, Bulb, Vegetable

Origin

Central Asia

Interest and use

Culinary

Search or browse our Glossary of 3,000+ botanical and plant-related terms


Have something to say about this plant?
Click to write a post, ask a question or share a tip.


  • Plant Placeholder

Needs

  • LightFull sun
  • HardinessHardy (min -10°C)
  • SoilWell drained, Fertile, Light, Medium, Low salinity
  • Soil pH5.5 to 7.0
  • WaterSemi-moist

Cultivation

Harvesting may start in late summer.

Propagation

By seed or by specially heat-treated sets.

Pests, diseases or disorders

White mould, onion eel-worm and onion fly.

Search or browse our Glossary of 3,000+ botanical and plant-related terms


Have something to say about this plant?
Click to write a post, ask a question or share a tip.


Have something to say about this plant?
Click to write a post, ask a question or share a tip.


Allium cepa ‘Showmaster’ posts


Other Allium posts

To view Allium plants offered near you, enter your postcode or log in.

Get started & find out why

Posts of the WeekPosts & Events

Open your garden for Thrive
Sunflower

“It’s not just gardening,
it makes us healthier and happier”

Production v5.9.2 (00577d2)