Orlaya grandiflora

RHS Plant Profile
white laceflower

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white laceflower RHS
white laceflower RHS

Synonyms

Orlaya grandiflora 'White Lace'
Caucalis grandiflora
Caucalis daucoides L.

Award of Garden Merit
Annual Biennial
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A branching annual, 45-75cm tall with jaggedly divided leaves and white flowers in flattish umbels, the inner flowers small, the outermost with enlarged rays, giving a lacy effect. Floriferous, long flowering and attractive to insects

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
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
South–facing
Exposure
Exposed or 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
Drought Resistance
Yes

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Apiaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Orlaya are umbelliferous annual plants with finely dissected leaves and pink or often white flowers
Name Status
Correct
Plant Range
Europe to Turkey

How to Grow

Cultivation

Grow in a sunny open position in well-drained or poor soil

Propagation

Propagate by seed in spring for summer and autumn flowering or sow seed in autumn for early-flowering large plants

Suggested planting locations and garden types

  • Cottage and informal garden
  • Gravel garden
  • Wildlife gardens
  • Wildflower meadow
  • Prairie planting
  • Cut flowers
  • Flower borders and beds

Pruning

No pruning required but deadhead or cut down flowers when finished

Pests

Generally pest-free

Diseases

Generally disease-free