Smyrnium olusatrum

RHS Plant Profile
alexanders

Other common names

alisanders, black lovage, black pot-herb, horse parsley, stanmarch, Thanet celery

Plants for pollinators
Annual Biennial

A vigorous, semi-evergreen biennial of the umbellifer family, growing to 75-120cm high with a solid stem which becomes hollow and grooved with age. The leaves are bluntly toothed, the flat segments ternately divided. The plant bears greenish-yellow flowers in umbrella-like clusters with a pungent, myrrh-like scent

Position

Full sun

Soil Types

Sand, Clay, Chalk, Loam

Max Height

1-1.5 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

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

Position

Full sun
Aspect
South–facing or West–facing or East–facing
Exposure
Sheltered
Hardiness
H6

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Apiaceae
Native to GB/Ireland
Yes
Foliage
Deciduous
Habit
Clump forming
Genus
Smyrnium are erect, branching biennials with broadly oblong, divided lower leaves and rounded upper leaves. In late spring and early summer they produce branched umbels of small, greenish-yellow flowers
Name Status
Correct
Plant Range
Mediterranean

How to Grow

Cultivation

Best grown in a free draining soil in full sun. Grows well in coastal areas

Propagation

Propagate by seed. See sowing vegetable seeds

Suggested planting locations and garden types

  • Coastal
  • Cottage and informal garden
  • Wildlife gardens
  • Flower borders and beds

Pruning

Not required

Pests

Generally pest-free

Diseases

Generally disease-free