groundcover

Mariner Asarum

Asarum subglobosum 'Mariner'

The Story

Plant Bio

Asarum subglobosum, known as Mariner, is a low-growing perennial with rounded, heart-shaped leaves and small, bell-shaped flowers that often feature a distinctive pattern, creating a ground-covering mat.

This cultivar is prized for its attractive foliage and compact growth habit, making it an excellent choice for shaded garden beds and woodland settings.

Uses & Benefits:

Provides lush groundcover with attractive, fragrant foliage that brightens shaded areas.

Suppresses weeds under trees and shrubs, reducing garden maintenance.

Supports pollinators and enhances shade garden biodiversity.

Essentials

At a Glance

Plant Type

Groundcover

Height

4 inches

Width

6 inches

Light

Partial Sun, Shade

Zones

6, 7, 8, 9

Water

Requires consistent moisture

Humidity

Average to high humidity

Lifespan

Perennial

Native To

Eastern Asia

Toxicity

Toxic if ingested

Bloom period

Early spring – Late spring

In flower about 3 months of the year

Planting

How to Grow

Tuck seeds or cuttings into well-drained soil in early spring
Water thoroughly after planting to settle soil
Maintain evenly moist soil for best establishment
Apply mulch to retain moisture and suppress weeds
Ensure partial shade for optimal growth
Monitor for pests and address promptly

Pro Tip

Use rich, well-draining soil and provide dappled shade for best results

Keep It Thriving

Care Guide

Do

Water regularly to keep soil moist 🌱
Mulch to conserve moisture and regulate temperature
Prune dead or damaged foliage in early spring

Don't

Avoid overwatering to prevent root rot ❌
Don’t expose to direct hot sun, which can scorch leaves
Refrain from disturbing roots during dormancy

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Mulch
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shaded woodland gardenSoft border edgingUnderplanting for shade trees

Companion Plants

Ferns Hostas Heuchera Astilbe Tiarella

Multiply

Propagation Methods

Good to Know

Common Questions

Mariner Asarum questions

What zones can Mariner Asarum grow in?

Mariner Asarum is hardy in USDA Zones 6–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Mariner Asarum deer resistant?

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

When does Mariner Asarum bloom?

Mariner Asarum typically blooms in early spring through late spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Mariner Asarum need full sun?

Mariner Asarum does best in part shade.