Oenothera glazioviana

RHS Plant Profile
large-flowered evening primrose

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large-flowered evening primrose RHS
large-flowered evening primrose visionspictures.com
large-flowered evening primrose visionspictures.com

Synonyms

Oenothera lamarckiana
Oenothera erythrosepala

Plants for pollinators
Annual Biennial
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An erect biennial, to 1.5m tall, with a basal rosette of crinkly, oval leaves and, in the second year, terminal clusters of bowl-shaped, pale yellow flowers, which open from red buds, in the evening in summer and autumn

Position

Full sun

Soil Types

Loam, Sand

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

Loam Sand
Moisture
Well–drained
pH
Acid or 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)
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Onagraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Columnar upright
Genus
Oenothera can be annuals, biennials or perennials, upright or spreading in habit, with simple or lobed leaves and bowl-shaped, white, yellow or pink flowers over a long period in summer
Name Status
Correct

How to Grow

Cultivation

Grow in an open position in poor to moderately fertile, well-drained soil in full sun

Propagation

Propagate by seed sown in early summer

Suggested planting locations and garden types

  • Cottage and informal garden
  • Coastal
  • Gravel garden
  • Wildflower meadow
  • Flower borders and beds

Pruning

Cut back after flowering

Pests

Generally pest-free

Diseases

May be susceptible to powdery mildews and a leaf spot