Allium 'Globemaster'
Ornamental onion
Also known as Allium giganteum 'Globemaster'
- Height × spread
- 1.3m × 0.6m
- Position
- Full sun
- Hardiness
- Very cold to -20C (RHS H6)
- Flowers
- Spring, Summer
Availability
Generally available as bulbs in Autumn, plants in Spring & Summer
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
Imposing when in flower with its large rounded heads of violet purple flowers held on stout stems way above the foliage. The flower head is made up of numerous small starry blooms with long slender petals. Grown in a group they look like some strange convention of alien beings. The bulky flower heads look far too large for the already failing basal leaves. They are said to be most imposing in their first year in the garden, the flowers becoming smaller in diameter as well as shorter in subsequent years. These come into flower in May and early June.
- Flower colour
- Mauve
- Foliage colour
- Green
- Variegated
- No
- Scent
- Yes
- Shape
- Round
- Height
- 1.3m
- Spread
- 0.6m
- Season of interest
- Spring, Summer
- Flowers in
- Spring, Summer
- Evergreen
- Deciduous
- Garden style
- Small scale garden, Seaside garden, Prairie garden, Gravel garden, Exotic garden
- Sun or shade
- Likes full sun
- Soil type
- Loam (normal)
- Soil pH
- All types
- Drainage
- Moisture retentive soil, Well drained soil
- Hardiness
- Very cold to -20C (RHS H6)
- Borders & containers
- Borders
- Use for
- Deer resistant, Rabbit resistant, Bee attraction, Butterfly attraction
- Maintenance
- Easycare – low/no maintenance
- Hazards
- No
AutumnNow
Autumn · Planting
Remove offsets to create new plants
Offsets are small plants or shoots that develop around the parent plant. They should have developed a root system of their own before they are detached. They can be planted directly, or grown in pots if so small they could be 'lost' in the garden.
Spring
Spring - late · Outdoors
Feed with slow release fertiliser
Apply a general purpose slow release fertiliser, spreading it around the root area of the plant as it is coming into growth. (Or apply a liquid feed at regular intervals throughout the growing season.)
This is a simple way to provide a nutrient boost as a single annual procedure.
Spring-Autumn · Outdoors
Water to keep the soil moist
For best results, this plant needs soil that is always moist. Water deeply and regularly as soon as soil appears dry. Even for established plants in the ground, a dry week can cause problems with some soils. Check plants in pots more often, especially in hot weather. Or install an automatic irrigation system which will do the hard work for you, even when you are away on holiday.
Without regular watering some plants never fully regain their beauty.
Found in
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