perennial

Iron Cross Plant

Oxalis deppei 'Iron Cross Reversed'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

9 inches

Width

6 inches

Light

Full Sun, Partial Sun

Zones

8, 9

Water

Medium

Humidity

Average

Lifespan

Perennial

Native To

Mexico

Toxicity

Contains oxalic acid; toxic to pets and humans if ingested in large quantities.

The Story

Plant Bio

Oxalis tetraphylla, commonly known as the Iron Cross plant or good luck plant, is a bulbous perennial noted for its distinctive four-parted, clover-like leaves. Each leaflet has a purplish-black blotch at the base, which together form a cross-like pattern. It produces clusters of small, five-petaled, rose-pink to reddish-purple flowers in summer. The 'Iron Cross' cultivar is prized for its ornamental foliage. The bright green leaflets each have a distinct dark purple-black blotch at their base, which collectively form a striking cross shape in the center of the leaf.

Bloom Period:

EarlyLate

Uses & Benefits:

Distinctive foliage adds visual interest in shaded areas, thriving with minimal care.

Provides ground cover that suppresses weeds and prevents soil erosion.

Supports pollinators attracted to its nectar and foliage.

Marketplace

Where to Buy

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Shipping costs Year-round shipping Free shipping

Planting

How to Grow

Tuck seeds into well-draining soil in early spring
Water regularly to keep soil moist but not waterlogged
Mist cuttings or divisions in spring for propagation
Place in partial shade for optimal growth
Mulch lightly to retain moisture during summer
Divide every 2-3 years to maintain vigor

Pro Tip

Ensure soil is well-draining to prevent root rot

Keep It Thriving

Care Guide

Do

Water when topsoil feels dry 🌱
Mulch to conserve moisture
Divide in early spring to promote healthy growth
Place in bright, indirect light

Don't

Overwater to avoid soggy roots ❌
Keep in full sun if soil drains poorly ❌
Neglect division; plants can become crowded ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Divide
Fertilize
Lift Store
Plant
Spring Cleanup
Winter Prep

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Dappled shaded borderRock garden accentGroundcover under trees

Companion Plants

Hosta Ferns Heuchera Astilbe Japanese painted fern

Multiply

Propagation Methods

Good to Know

Common Questions

Iron Cross Plant questions

What zones can Iron Cross Plant grow in?

Iron Cross Plant 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 Iron Cross Plant deer resistant?

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

When does Iron Cross Plant bloom?

Iron Cross Plant typically blooms in summer through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Iron Cross Plant need full sun?

Iron Cross Plant does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.