Search the RHS website

Ammi majus

Home | Plants > Plant Selector > Ammi majus

Characteristics

Plant type

Annual/Biennial

Habit

Columnar/Upright

Resilience

Hardiness

old H4 (hardy)

Colour

Flower

White in Summer

Foliage

Green in Spring and Summer

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.1-0.5 metres

Time to ultimate height

1-2 years

Preferred common name

false bishop's weed

Family

Apiaceae

Ammi can be annuals or biennials, upright or spreading, with fern-like, pinnately divided leaves and large, branched umbels of small creamy-white flowers in summer

Ammi majus is an upright annual with 2 to 3-pinnate leaves and compound umbels of small white flowers in summer

Other common names

bullwort
common bishop's weed
herb William

Suppliers

Suppliers listed in RHS Plant Finder

How to grow

Sunlight

Full sun
Part shade

Aspect

South-facing, West-facing or East-facing

Sheltered or Exposed

Cultivation

Grow in any well-drained soil in full sun or partial shade, provide support when seedlings reach 7-10cm (3-4in) high

Soil

Well-drained

Neutral, Acid or Alkaline

Loam, Sand or Chalk

Propagation

Propagate by seed sown in situ in spring

Suggested planting locations and garden types

Cottage/Informal Garden, Flower borders and beds or Wildflower meadow

How to care

Pruning

Cut back after flowering

Pests

Generally pest free

Diseases

Generally disease free

Skip to top