Species

Oxalis triangularisTriangular Oxalis Purple Shamrock

5 other cultivars

perennial

Irish Mist False Shamrock

The Story

Plant Bio

Oxalis triangularis is a perennial plant grown from bulbs, known for its distinctive trifoliate leaves that fold up at night. It produces delicate, five-petaled flowers.

The 'Irish Mist' cultivar is distinguished by its bright green leaves heavily speckled with silvery-white markings, creating a misty or frosted appearance. It bears pale pink to white flowers.

Uses & Benefits:

Adds vibrant purple foliage and delicate texture to shaded gardens.

Provides ground cover that suppresses weeds in shaded areas.

Attracts beneficial insects and pollinators for garden health.

SpeciesOxalis triangularisTriangular Oxalis Purple Shamrock

Essentials

At a Glance

Plant Type

Perennial

Height

6 inches

Width

8 inches

Light

Partial Sun, Shade

Zones

8, 9, 10

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

South America

Toxicity

Contains oxalic acid; toxic to pets if ingested in large amounts.

Bloom period

Late spring – Late fall

In flower about 7 months of the year

Planting

How to Grow

Tuck seeds or small bulbs into well-draining soil in early spring.
Water regularly to keep soil moist but not waterlogged.
Place in partial shade for optimal leaf color.
Mulch lightly to retain moisture and suppress weeds.
Fertilize monthly during active growth periods.
Divide clumps every 2-3 years in early spring for propagation.

Pro Tip

Ensure soil drains well to prevent bulb rot and enjoy vibrant foliage.

Keep It Thriving

Care Guide

Do

Water consistently, especially during dry spells 🌱
Use well-draining soil to prevent root rot
Place in partial shade for best leaf color
Divide every few years to maintain vigor

Don't

Avoid overwatering or waterlogging ❌
Don’t place in full sun, which can scorch leaves
Avoid heavy fertilization that can cause leggy growth
Do not neglect winter protection in colder zones

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Plant
Winter Prep

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Violet-colored groundcoverShade garden edgingContainer accent plant

Companion Plants

Hostas Ferns HeucheraHostas Caladium

Multiply

Propagation Methods

Good to Know

Common Questions

Irish Mist False Shamrock questions

What zones can Irish Mist False Shamrock grow in?

Irish Mist False Shamrock is hardy in USDA Zones 8–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Irish Mist False Shamrock deer resistant?

Not reliably. Deer may browse Irish Mist False Shamrock, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Irish Mist False Shamrock bloom?

Irish Mist False Shamrock typically blooms in late spring through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Irish Mist False Shamrock need full sun?

Irish Mist False Shamrock does best in part shade.