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Rosmarinus officinalis 'Severn Sea' AGM

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© RHS

Characteristics

Plant type

Shrub

Habit

Bushy

Fragrance

Leaf

Resilience

Hardiness

H4 (hardy - average winter)

Colour

Flower

Blue in Autumn, Spring and Summer

Foliage

Dark Green in Autumn, Spring, Summer and Winter

Size

Ultimate height

0.5-1 metres

Ultimate spread

0.5-1 metres

Time to ultimate height

2-5 years


Preferred common name

rosemary 'Severn Sea'

Family

Lamiaceae


Rosmarinus are evergreen shrubs with narrow, aromatic leaves and 2-lipped blue flowers borne in small clusters in the leaf axils

'Severn Sea' is a medium-sized evergreen shrub of arching habit, with aromatic, linear, dark green leaves and bright blue, two-lipped flowers in axillary clusters in spring and summer, sometimes again in autumn

How to grow

Sunlight

  • Full sun

Aspect

  • South-facing, West-facing or East-facing
  • Sheltered or Exposed

Cultivation

Easy to grow aromatic, evergreen shrub. Prefers poor, well-drained soil and may be used as a formal or informal low hedge which should be trimmed after flowering

Soil

  • Well-drained or Moist but well-drained
  • Acid, Alkaline or Neutral
  • Sand, Clay, Chalk or Loam

Propagation

Propagate by semi-hardwood cuttings

Suggested planting locations and garden types

City/Courtyard Gardens, Coastal, Cottage/Informal Garden, Flower borders and beds, Rock Garden or Wall-side Borders


How to care

Pruning

Pruning group 9

Pests

Generally pest free

Diseases

Generally disease free