Allium cyaneum
Blue flowered onion
Also known as Allium beesianum
- Height × spread
- 0.25m × 0.1m
- Position
- Full sun
- Hardiness
- Colder than -20C (RHS H7)
- Flowers
- Summer
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
A dainty little plant that, at first glance, could be mistaken for a petite English bluebell. It has slim fresh-green grassy stems. The rich-blue flowers come in late summer, generally making their appearance during August. The blooms are pendulous, delicate and need a sheltered site to show them off. They look more suited to the bare spring garden than the late summer garden that is filled with robust foliage. Tuck this into a trough or a corner of a rock garden so it can have its own space. This grows up to 25cm (10in) height with 10cm (4in) spread.
- Flower colour
- Blue
- Foliage colour
- Green
- Variegated
- No
- Scent
- No
- Shape
- Fan
- Height
- 0.25m
- Spread
- 0.1m
- Season of interest
- Summer
- Flowers in
- Summer
- Evergreen
- Deciduous
- Garden style
- Small scale garden, Rock garden
- Sun or shade
- Likes full sun
- Soil type
- Gravelly soil, Loam (normal), Sandy soil
- Soil pH
- All types
- Drainage
- Well drained soil
- Hardiness
- Colder than -20C (RHS H7)
- Borders & containers
- Borders and containers
- Use for
- Ground cover, Deer resistant, Rabbit resistant, Bee attraction, Butterfly attraction
- 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 during dry periods
For plants in the ground, when there has been little or no rain for a period of 7-10 days and the soil is dry, give it a deep watering and repeat weekly until there is a downpour of rain. Check plants in pots more frequently, especially in hot weather.
Found in
More Allium
Allium
Onion
Allium 'Gladiator'
Onion
Allium 'Globemaster'
Ornamental onion
Allium cristophii
Star of Persia, Persian onion
Allium hollandicum 'Purple Sensation'
Onion, Giant flowering onion
Allium stipitatum 'Mount Everest'
Trunked allium
Allium 'Beau Regards'
Ornamental onion
Allium 'Bubble Bath'
Ornamental onion