Acanthus sennii

Acanthus sennii

Acanthus

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 not flower in June

Plant does not 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: Acanthus sennii
  • Common name: Acanthus
  • Family: Acanthaceae
  • Plant Type: Perennial, Deciduous
Flower colour:

Red

Foliage colour:

Green

Silver

Acanthus sennii is an unusual acanthus, native to the highlands of Ethiopia. Tall growing, it has incredibly spiny, holly-like silvery green leaves with prominent white veining, from which a central spike of red flowers appears from late-summer to autumn. It makes a fantastic plant for a tropical planting scheme, where both its leaves and flowers make for a dramatic display.

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Surprisingly hardy, Acanthus sennii will die back in autumn but regrow in spring, and is best treated as a herbaceous perennial. Alternatively, grow it in a large container in a conservatory or greenhouse, where it may provide an evergreen display.

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Grow Acanthus sennii in free-draining soil or compost, preferably with the addition of sharp sand to further aid drainage, in full sun to partial shade. Protect from winds and stake if plants are likely to flop. Keep dry in winter to prevent the rootball rotting.

How to grow Acanthus sennii

  • Plant size

    1.6m height

    1.4m spread

  • Aspect

    South facing, west facing

  • Position in border

    Back

  • Sun exposure: Full sun
  • Hardiness: Hardy
  • Soil type: 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 not Plant in March

Do not Plant in April

Do Plant in May

Do 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 not flower in June

Plant does not 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

Acanthus sennii and wildlife

Acanthus sennii has no particular known value to wildlife in the UK.

Is Acanthus sennii poisonous?

Acanthus sennii 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