groundcover

Formosan Ophiopogon

Ophiopogon formosanus 'BSWJ 3659'

The Story

Plant Bio

Ophiopogon formosanus, known as Taiwanese Mondo Grass, is a low-growing perennial with dense, grass-like foliage and small, bell-shaped flowers that are typically white or pale in color, forming a neat ground cover.

The cultivar BSWJ 3659 is distinguished by its vigorous growth habit and enhanced tolerance to shade, making it particularly suitable for ornamental ground cover in shaded garden areas.

Uses & Benefits:

Provides evergreen groundcover with slender foliage, ideal for shaded areas.

Drought tolerant and low-maintenance, reducing garden care needs.

Supports local biodiversity by requiring minimal fertilizers and water.

Essentials

At a Glance

Plant Type

Groundcover

Height

6 inches

Width

12 inches

Light

Partial Sun, Shade

Zones

7, 8, 9, 10

Water

Moderate, drought tolerant once established

Humidity

Prefers moderate humidity

Lifespan

Perennial

Native To

Taiwan

Toxicity

Non-toxic to humans and pets

Bloom period

Early summer – Mid-summer

In flower about 2 months of the year

Planting

How to Grow

Tuck seeds or divisions into well-draining soil in spring
Water thoroughly after planting to establish roots
Mist cuttings regularly to promote rooting
Fertilize lightly in early spring with a balanced fertilizer
Mulch around plants to retain moisture and suppress weeds
Divide every 3-4 years in early spring for propagation

Pro Tip

Ensure soil is well-draining to prevent root rot and promote healthy growth

Keep It Thriving

Care Guide

Do

Water regularly during dry periods 🌱
Mulch to conserve moisture
Divide every few years to maintain vigor
Plant in partial shade for best results

Don't

Avoid overwatering in winter ❌
Don't expose to full sun in hot climates
Refrain from heavy fertilization
Avoid disturbing roots unnecessarily

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shaded rock gardenUnderstory groundcover in woodland gardensBorder edging in shaded beds

Companion Plants

Ferns Hostas Heuchera AstilbeSolomon's seal

Multiply

Propagation Methods

Good to Know

Common Questions

Formosan Ophiopogon questions

What zones can Formosan Ophiopogon grow in?

Formosan Ophiopogon is hardy in USDA Zones 7–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Formosan Ophiopogon deer resistant?

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

When does Formosan Ophiopogon bloom?

Formosan Ophiopogon typically blooms in early summer through mid-summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Formosan Ophiopogon need full sun?

Formosan Ophiopogon does best in part shade.