Species

Oxalis triangularisTriangular Oxalis Purple Shamrock

4 other cultivars

perennial

False Shamrock

Oxalis triangularis 'Fanny'

The Story

Plant Bio

A clump-forming perennial from rhizomes, noted for its trifoliate, triangular leaflets that fold up at night or in dim light. It produces small, five-petaled flowers.

This cultivar features bright green, triangular leaflets and delicate, pure white, five-petaled flowers.

Uses & Benefits:

Provides charming purple foliage and delicate flowers, ideal for shaded gardens.

Edible leaves add flavor to salads and dishes.

Supports pollinators like bees and beneficial insects.

SpeciesOxalis triangularisTriangular Oxalis Purple Shamrock

Essentials

At a Glance

Plant Type

Perennial

Height

8 inches

Width

12 inches

Light

Partial Sun, Shade

Zones

8, 9, 10

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

South America

Toxicity

Toxic to pets if ingested

Bloom period

Late spring

In flower about 1 month of the year

Planting

How to Grow

Tuck seeds or small bulbs into well-draining soil in early spring
Water thoroughly after planting to settle soil around roots
Place in partial shade to protect from intense afternoon sun
Maintain moist soil during active growth period
Mulch lightly to retain moisture and suppress weeds
Divide clumps every 2-3 years in early spring for propagation

Pro Tip

Ensure soil drains well to prevent bulb rot and promote healthy growth

Keep It Thriving

Care Guide

Do

Water regularly to keep soil moist 🌱
Apply a balanced fertilizer in spring
Remove dead or yellowing leaves to encourage new growth

Don't

Avoid overwatering to prevent bulb rot ❌
Don’t expose to full, harsh afternoon sun
Refrain from heavy fertilization which can cause legginess

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Fertilize
Lift Store
Plant

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vining purple ground coverShaded border accentContainer plant for shaded patio

Companion Plants

Hostas Ferns Heuchera ImpatiensColeus

Multiply

Propagation Methods

Good to Know

Common Questions

False Shamrock questions

What zones can False Shamrock grow in?

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 False Shamrock deer resistant?

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

When does False Shamrock bloom?

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

Does False Shamrock need full sun?

False Shamrock does best in part shade.