1 named cultivar

‘Spinosissimus’Spiny Bear's Breeches

perennial

Spiny Bear's Breeches

Q: What zones can Spiny Bear's Breeches grow in?

Spiny Bear's Breeches is hardy in USDA Zones 5–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Q: Is Spiny Bear's Breeches deer resistant?

Yes — Spiny Bear's Breeches is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

Q: When does Spiny Bear's Breeches bloom?

Spiny Bear's Breeches typically blooms in late spring to mid-summer through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Q: Does Spiny Bear's Breeches need full sun?

Spiny Bear's Breeches does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Q: Is Spiny Bear's Breeches drought tolerant?

Yes — once established (usually after the first full season), Spiny Bear's Breeches handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.

Acanthus spinosus

$22.50

The Story

Plant Bio

Acanthus spinosus, spiny bear's breeches, is a bold clumping perennial from the Mediterranean, three to four feet in both directions. Deeply cut arching dark green leaves carry sharp spines along their margins, and tall stiff spikes of hooded white flowers backed by purple bracts rise well above the foliage in early summer.

This is the leaf carved on Corinthian columns, and the architectural quality is genuine. It is also close to impossible to remove: the deep brittle roots regenerate from any fragment left in the ground, so a plant put in the wrong place is a permanent decision. The leaf spines are sharp enough to need gloves for any handling.

Uses & Benefits:

Deeply cut architectural foliage and tall hooded flower spikes, the classical Corinthian leaf.

Long-lived, drought tolerant once established, and tolerant of dry shade under trees.

Bees work the hooded flowers, which are shaped for larger long-tongued species.

Essentials

At a Glance

Plant Type

Perennial

Height

48 inches

Width

42 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8, 9, 10

Water

Low

Humidity

Moderate

Lifespan

Perennial

Native To

Mediterranean Europe

Toxicity

Non-toxic, but the leaf spines injure

Marketplace

Where to Buy

Dancing Oaks

<1 Gal Pot

In Stock$22.50

Nature Hills

In Stock$40.60

Shipping costs Year-round shipping Free shipping

Planting

How to Grow

Choose the position carefully; it is permanent.
Plant in partial shade in deep, freely drained soil.
Wear gloves; the leaf margins are sharply spined.
Water while establishing, then rarely.
Cut flower spikes down after they fade.
Do not attempt to move it once settled.

Pro Tip

Every root fragment regrows, so siting it is a one-off decision — digging it out later simply multiplies it.

Keep It Thriving

Care Guide

Do

Choose its position permanently 📍
Wear gloves when handling it 🧤
Give it deep, drained soil 🌱
Cut spent spikes down ✂️

Don't

Try to move an established clump ❌
Handle the leaves bare-handed ❌
Plant it where it will need removing ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cut Back
Enjoy

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Architectural accent in a shaded borderMediterranean and gravel plantingBold foliage contrast among finer plants

Companion Plants

Bergenia EuphorbiaHardy Geranium AlchemillaOrnamental Grass

Multiply

Propagation Methods

Good to Know

Common Questions