Evening primrose, Oenothera 'Crown Imperial'

Oenothera ‘Crown Imperial’

Evening primrose

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does not flower in May

Plant does flower in June

Plant does flower in July

Plant does not flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

  • Botanical name: Oenothera 'Crown Imperial'
  • Common name: Evening primrose
  • Family: Onagraceae
  • Plant Type: Perennial
Flower colour:

Yellow

Foliage colour:

Green

Evening primroses, Oenothera, are a group of annuals, biennials and perennials, native to North and South America. They’re so-called because the flowers of many species open in the evenings to attract pollinators that are specialised to collecting pollen from them. Many evening primroses have richly scented flowers.

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Oenothera ‘Crown Imperial’ bears a close resemblance  to crown imperials (Fritillaria imperialis), hence the cultivar name. Each flower bud is a warm orange before opening to reveal a bright yellow bloom. The flowers have a light fragrance.

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For best results, grow Oenothera ‘Crown Imperial’ in full sun in well-drained soil. ‘Crown Imperial’ is a sterile cultivar, so won’t self-seed like many other evening primroses. Propagate Oenothera ‘Crown Imperial’ by taking root cuttings in early spring.

How to grow Oenothera 'Crown Imperial'

  • Plant size

    50cm height

    40cm spread

  • Aspect

    South facing, west facing

  • Position in border

    Middle

  • Sun exposure: Dappled shade, full sun
  • Hardiness: Hardy
  • Soil type: Acidic / chalky / alkaline / clay / heavy / moist / well drained / light / sandy

Plant calendar

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Plant
Plant

Do not Plant in January

Do not Plant in February

Do Plant in March

Do Plant in April

Do Plant in May

Do not Plant in June

Do not Plant in July

Do not Plant in August

Do not Plant in September

Do not Plant in October

Do not Plant in November

Do not Plant in December

Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does not flower in May

Plant does flower in June

Plant does flower in July

Plant does not flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

Take cuttings
Take cuttings

Do not Take cuttings in January

Do not Take cuttings in February

Do Take cuttings in March

Do Take cuttings in April

Do not Take cuttings in May

Do not Take cuttings in June

Do not Take cuttings in July

Do not Take cuttings in August

Do not Take cuttings in September

Do not Take cuttings in October

Do not Take cuttings in November

Do not Take cuttings in December

Oenothera 'Crown Imperial' and wildlife

Oenothera 'Crown Imperial' has no particular known value to wildlife in the UK.

Is Oenothera 'Crown Imperial' poisonous?

Oenothera 'Crown Imperial' has no toxic effects reported.

No reported toxicity to:

No reported toxicity to Birds

No reported toxicity to Cats

No reported toxicity to Dogs

No reported toxicity to Horses

No reported toxicity to Livestock

No reported toxicity to People

Plants that go well with Oenothera 'Crown Imperial'