Evening primrose, Oenothera speciosa 'Siskiyou'

Oenothera speciosa ‘Siskiyou’

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 flower in May

Plant does flower in June

Plant does flower in July

Plant does flower in August

Plant does flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

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

Pink

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 speciosa ‘Siskiyou’ is a sprawling plant producing masses of pale pink flowers throughout summer and often into autumn. It looks particularly good in a cottage garden or coastal setting. The blooms of Oenothera speciosa ‘Siskiyou’ are open during the day to attract day-flying pollinators. It’s a good choice for ground cover.

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For best results, grow Oenothera speciosa ‘Siskiyou’ in full sun or partial shade in moist, well-drained soil. Cut it back as it begins to lose steam to produce a new flush of foliage and flowers. Can vigorously spread if growing in favourable conditions, so it’s one to keep a close eye on.

How to grow Oenothera 'Siskiyou'

  • Plant size

    30cm height

    30cm spread

  • Aspect

    South facing, west facing

  • Position in border

    Front

  • Sun exposure: 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 Plant in September

Do Plant in October

Do 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 flower in May

Plant does flower in June

Plant does flower in July

Plant does flower in August

Plant does flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

Divide
Divide

Do not Divide in January

Do not Divide in February

Do Divide in March

Do Divide in April

Do not Divide in May

Do not Divide in June

Do not Divide in July

Do not Divide in August

Do not Divide in September

Do Divide in October

Do Divide in November

Do not Divide in December

Take cuttings
Take cuttings

Do not Take cuttings in January

Do not Take cuttings in February

Do not Take cuttings in March

Do not Take cuttings in April

Do not Take cuttings in May

Do Take cuttings in June

Do 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

Cut back
Cut back

Do not Cut back in January

Do not Cut back in February

Do not Cut back in March

Do not Cut back in April

Do not Cut back in May

Do not Cut back in June

Do Cut back in July

Do Cut back in August

Do not Cut back in September

Do not Cut back in October

Do not Cut back in November

Do not Cut back in December

Oenothera 'Siskiyou' and wildlife

Oenothera 'Siskiyou' is known for attracting bees and butterflies​/​moths. It has nectar/pollen rich flowers.

Attractive to Bees

Does not attract Beneficial insects

Does not attract Birds

Attractive to Butterflies​/​Moths

Does not attract Other pollinators

Is Oenothera 'Siskiyou' poisonous?

Oenothera 'Siskiyou' 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 'Siskiyou'