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Bear's Breech

Acanthus mollis

Also known as Bear's Breeches, Artist's Acanthus, Oak-leaf Bear's-breeches

herbaceous⛅ part shade💧💧 moderate water❄ Hardy: Zone 7a – Zone 11a

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A robust Mediterranean perennial with deeply lobed, architectural foliage and tall spikes of white or purple flowers. It is grown mainly as a structural ornamental for its dramatic form and deer resistance; its leaves have a traditional medicinal use.

Why grow it

Bear's breech offers architectural foliage and height (3-4 feet) that distinguishes it from softer-textured perennials in mixed borders. Unlike many Mediterranean plants, it tolerates partial shade and heavy clay soils, making it useful where drought-tolerant options are limited. Its deep root system can help break compacted soil, though it requires established plants (2+ years) to deliver meaningful soil improvement.

Watch out for

The plant spreads readily from root fragments and self-seeding in mild climates, so divide clumps every few years to manage spread. Foliage can look ragged by late summer in hot, dry conditions; cutting back hard after flowering promotes tidier regrowth. In areas with hard freezes, mulch around the crown to protect emerging shoots in early spring.

Overview

Form
Spreading
Growth Rate
fast
Size
2–4′ tall × 2–3′ wide
Dormancy
semi-evergreen
Family
Acanthaceae
Medicinal

Native Range

Mediterranean

Seasonality

Bloom Season

J
F
M
A
M
J
J
A
S
O
N
D

Season of Interest

SpringSummer

Notable Cultivars

'Latifolius' has broader, more deeply cut leaves and is more vigorous; 'Tasmanian Angel' is a compact white-flowered form suitable for smaller spaces.

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Companion Planting

Plants well with