North America Non-native Plant

Bear’s Breech

Botanical name: Acanthus mollis

USDA symbol: ACMO8

Life cycle: perennial

Habit: forb

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Bear’s Breech: A Mediterranean Marvel for Your Garden If you’re looking to add some serious drama to your garden, bear’s breech (Acanthus mollis) might just be the showstopper you need. This bold perennial brings a touch of Mediterranean flair with its impressive foliage and towering flower spikes that seem to ...

Bear’s Breech: A Mediterranean Marvel for Your Garden

If you’re looking to add some serious drama to your garden, bear’s breech (Acanthus mollis) might just be the showstopper you need. This bold perennial brings a touch of Mediterranean flair with its impressive foliage and towering flower spikes that seem to say, Look at me! But before you fall head over heels for this architectural beauty, let’s dig into what makes this plant tick and whether it’s right for your garden.

What Is Bear’s Breech?

Bear’s breech is a herbaceous perennial that belongs to the forb family – essentially a fancy way of saying it’s a non-woody plant that dies back in winter and returns each spring. Originally hailing from the Mediterranean region of Southern Europe and North Africa, this plant has made itself quite at home in milder climates around the world.

In the United States, you’ll find bear’s breech thriving primarily in California, where the Mediterranean-like conditions suit it perfectly. As a non-native species that has naturalized in some areas, it’s established itself as a garden favorite among those who appreciate bold, statement plants.

Why Gardeners Love (and Sometimes Question) Bear’s Breech

The main attraction of bear’s breech is undoubtedly its stunning appearance. Picture this: massive, deeply lobed leaves that can reach up to 2 feet long, creating a lush, almost tropical-looking carpet. Then, come late spring to early summer, up shoot dramatic flower spikes that can tower 3-6 feet tall, adorned with white flowers accented by purple bracts. It’s like having a living sculpture in your garden!

This plant really shines as:

  • A bold accent plant that commands attention
  • A backdrop for smaller plants in mixed borders
  • An architectural focal point in formal or Mediterranean-style gardens
  • Ground cover in larger spaces (though it can be quite spreading)

However, there are a few things to consider before planting. Since bear’s breech isn’t native to North America, it doesn’t provide the same ecological benefits as indigenous plants. If supporting local wildlife and pollinators is a priority, you might want to consider native alternatives that offer similar dramatic appeal.

Growing Bear’s Breech Successfully

If you decide bear’s breech is right for your garden, you’ll be happy to know it’s relatively easy to grow in the right conditions. This plant thrives in USDA hardiness zones 7-10, making it suitable for much of the southern and western United States.

Ideal Growing Conditions

Bear’s breech is somewhat flexible but has definite preferences:

  • Light: Partial shade to full sun (though it appreciates some afternoon shade in hotter climates)
  • Soil: Well-draining soil is essential – this plant hates wet feet
  • Water: Moderate watering once established; drought-tolerant but looks better with regular moisture
  • Space: Give it room to spread – plan for 3-4 feet between plants

Planting and Care Tips

Spring is the best time to plant bear’s breech, giving it a full growing season to establish before winter. Here are some key care tips:

  • Plant in well-amended soil with good drainage
  • Water regularly the first year, then reduce frequency as the plant establishes
  • Cut back flower spikes after blooming to encourage more foliage growth
  • Protect from strong winds, which can damage the large leaves
  • Divide clumps every 3-4 years if they become too large

One word of caution: bear’s breech can be quite vigorous and may spread more than you expect. Some gardeners love this trait for filling large spaces, while others find it a bit too enthusiastic for smaller gardens.

Pollinator and Wildlife Benefits

While bear’s breech may not be native, its tall flower spikes do attract bees and other pollinators during its blooming period. The flowers provide nectar and pollen, offering some benefit to local pollinator populations, though not to the extent that native plants would.

Native Alternatives to Consider

If you love the dramatic foliage and architectural presence of bear’s breech but prefer to plant native species, consider these alternatives:

  • Wild ginger (Asarum canadense) for bold, heart-shaped leaves
  • Coral bells (Heuchera species) for attractive foliage and flower spikes
  • Native hostas in woodland settings
  • Large ferns like cinnamon fern (Osmundastrum cinnamomeum) for dramatic texture

The Bottom Line

Bear’s breech is a stunning plant that can add incredible drama and Mediterranean charm to the right garden. While it’s not native and therefore doesn’t provide the ecological benefits of indigenous plants, it’s not considered invasive either. If you have the space, the right climate (zones 7-10), and appreciate bold, architectural plants, bear’s breech could be a wonderful addition to your landscape. Just be prepared for its enthusiastic spreading habit and consider balancing your plant choices with native species that support local ecosystems.

Whether you choose to grow bear’s breech or opt for native alternatives, the key is creating a garden that brings you joy while being mindful of your local environment. Happy gardening!

Bear’s Breech

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Scrophulariales

Family

Acanthaceae Juss. - Acanthus family

Genus

Acanthus L. - acanthus

Species

Acanthus mollis L. - bear's breech

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA