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AGM plants have been through a rigorous trial and assessment programme. They are:
This plant will provide nectar and pollen for bees and the many other types of pollinating insects.
It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.
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Other common names bullwort common bishop's weed
false bishop's weed herb William
Family Apiaceae
Genus 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
Details Ammi majus is an upright annual with 2 to 3-pinnate leaves and compound umbels of small white flowers in summer
Foliage Deciduous
Habit Columnar/Upright
Hardiness
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H6
Full Sun
Partial Shade
Aspect South-facing or West-facing or East-facing
Exposure Exposed or Sheltered
Chalk
Loam
Sand
MoistureWell-drained
SoilChalk, Loam, Sand
pHAcid, Alkaline, Neutral
Ultimate height 0.5-1 metres
Ultimate spread 0.1-0.5 metres
Time to ultimate height 1-2 years
Cultivation Grow in any well-drained soil in full sun or partial shade, provide support when seedlings reach 7-10cm (3-4in) high
Propagation Propagate by seed sown in situ in spring
Suggested planting locations and garden types Flower borders and beds Wildflower meadow Cottage & Informal Garden
Pruning Cut back after flowering
Pests Generally pest free
Diseases Generally disease free
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
bullwort
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