Acanthus spinosus also known asBear’s breechesis aclump-forming perennial which is grown as much for its attractive foliage as for its bold flower spikes which are also highly attractive to bees.
It produces erect spikes of white flowers with spiny purplish pink bracts handsomely set off by the deeply cut, dark, shiny leaves in late spring and summer.
Suitable in a mixed border.
Details Acanthus spinosus
- Not eaten by animals
- Spreads over the years
- Very easy to grow
- Blooms: July – September
- Flower colour: purple
- Full grown: 1 Year
- Full grown height: 1 – 1.50 m
- Full grown width: 25 – 50 cm
- Plant location: sunny
- Plant depth: 15 cm
- Plant spacing: 40 cm
How to take care of Acanthus spinosus
Acanthus spinosus can be invasive, so either plant Acanthus spinosus in large containers or in a permanent place at the back of the border. Acanthus spinosus dislike being disturbed. Young plants need extra phosphorus to encourage good root development.
Plant Acanthus spinosus in a well-drained soil in full sun or partial shade. Acanthus spinosus are hardy but the crowns need mulch for the first two winters. Cut back to nearly ground level once the flowering season is over.
Acanthus spinosus often take two – three years to bloom. Divide Acanthus spinosus after 3 -5 blooming seasons in either spring or autumn. The easiest way to increase your plants is by taking cuttings in late autumn and early winter.
Acanthus spinosus will fail to grow if your soil is too heavy and has poor drainage. All Acanthus spinosus tend to perform unevenly, even when grown in full sun. Snails and slugs can do substantial damage if left unchecked.