perennial

Spiny Bear's Breeches

Acanthus spinosus 'Spinosissimus'

Not currently listed at our partner nurseries.

Expertly Curated

Real-Time Pricing

Loved by Designers

Essentials

At a Glance

Plant Type

Perennial

Height

48 inches

Width

30 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8, 9

Water

Moderate, drought-tolerant

Humidity

Average

Lifespan

Perennial

Native To

Mediterranean region

Toxicity

Non-toxic to humans and pets

The Story

Plant Bio

Acanthus spinosus 'Spinosissimus' is a perennial herbaceous plant distinguished by its tall, spiny, deeply lobed leaves and striking spikes of white flowers with purple bracts, forming an architectural presence in gardens. This cultivar is notable for its particularly spiny foliage and robust growth habit, making it well-suited for ornamental borders and drought-tolerant landscaping.

Uses & Benefits:

Provides striking architectural form with purple spikes, adding vertical interest year-round.

Drought-tolerant once established, reducing water needs.

Attracts pollinators like bees and butterflies, supporting local biodiversity.

Marketplace

Where to Buy

We couldn't find this plant listed online right now.

Shipping costs Year-round shipping Free shipping

Planting

How to Grow

Tuck seeds into well-draining soil in spring.
Water regularly until established, then drought-tolerant.
Provide full sun for optimal growth.
Fertilize lightly in early spring with balanced fertilizer.
Divide large clumps in early spring or fall.
Mulch to retain moisture and suppress weeds.

Pro Tip

Ensure excellent drainage and full sun for best flowering.

Keep It Thriving

Care Guide

Do

Water deeply during dry periods 🌱
Prune dead or damaged leaves in early spring
Mulch to conserve moisture and regulate soil temperature

Don't

Avoid overwatering to prevent root rot ❌
Don’t fertilize with high nitrogen fertilizers
Never disturb roots during flowering

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Fertilize
Harvest
Pest Check
Plant
Prune
Winter Prep

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Architectural focal pointDrought-tolerant borderWildlife-friendly garden

Companion Plants

Lavender Salvia Ornamental grasses Sedum Yarrow

Multiply

Propagation Methods

Good to Know

Common Questions

Spiny Bear's Breeches questions

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.

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.

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.

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.

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.