Allium stipitatum 'Mars'

RHS Plant Profile
allium 'Mars'

Synonyms

Allium 'Mars'

Plants for pollinators
Bulbs

Bulbous herbaceous perennial to 1.2m. Stems emerge in spring with green basal leaves which die back before blooms appear. Bears spheres of tiny star-shaped purple flowers, to 15cm in diameter, in early summer.

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
1-1.5 metres

Growing Conditions

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

Position

Full sun
Aspect
East–facing or South–facing or West–facing
Exposure
Sheltered
Hardiness
H5
Drought Resistance
Yes

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Amaryllidaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Columnar upright
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

Plant bulbs in early autumn, 20cm apart and at a depth of about four times the diameter of the bulb, in well-drained soil in full sun; for more advice, see Allium cultivation

Propagation

Propagate by division, removing offsets, in autumn

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Gravel garden
  • Mediterranean climate plants
  • Wildlife gardens
  • Low Maintenance
  • Flower borders and beds

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free, but may be susceptible to onion white rot and onion downy mildew