Seseli osseum

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Synonyms

Seseli osseum

Annual Biennial Herbaceous Perennial
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An upright, monocarpic (meaning it will generally flower once then die) umbellifer to around 80cm, with aromatic, soft, ferny blue-grey foliage. In summer, upright, branching stems bear flattened umbels of tiny, lacy white flowers which can be used in flower arrangements. An ideal choice for a sunny gravel garden

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

Chalk Loam Sand
Moisture
Moist but well–drained
pH
Alkaline or Neutral

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H7

Colour & Scent

Fragrance Foliage
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Apiaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Columnar upright
Genus
A genus with between 125 and 140 species of herbaceous perennial plants which may be woody at the base and have a cone-shaped tap root. Plants have intricate, stiff grey-green foliage on upright stems, topped with dense white umbels
Name Status
Synonym
Plant Range
E & C Europe

How to Grow

Cultivation

Grow in moist but well-drained, neutral to alkaline soil in full sun

Propagation

Propagate by seed. Self seeds freely

Suggested planting locations and garden types

  • Cottage and informal garden
  • Gravel garden
  • Cut flowers
  • Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free