bulb corm tuberN. America Native

Yellow Trout-lily

The Story

Plant Bio

Erythronium americanum is a low-growing, clump-forming spring ephemeral native to eastern North American woodlands, arising from deep-seated corms in early spring. The species is characterized by its pairs of elliptic-lanceolate basal leaves, which feature distinctive purplish-brown mottling over a glaucous green background.

A single nodding, bell-shaped yellow flower emerges per mature plant, with six tepals that reflex strongly backward to expose yellow, brown, or lavender-tinted anthers. The foliage naturally dies back to the ground by early summer as the plant enters a long period of dormancy.

Uses & Benefits:

Provides early spring color and distinctive mottled foliage in shaded woodland gardens.

Perfect for naturalizing in difficult, deeply shaded areas under deciduous trees where grass will not grow.

Supports early-emerging native pollinators, particularly specialized miner bees.

Essentials

At a Glance

Plant Type

Bulb Corm Tuber

Height

Width

Light

Partial Sun, Shade

Zones

4, 5, 6, 7, 8

Water

Moist but well-drained

Humidity

Moderate to high

Lifespan

Perennial

Native To

Eastern North America

Toxicity

Mild skin irritant; bulbs contain acrid compounds

Bloom period

Early spring – Mid-spring

In flower about 2 months of the year

Planting

How to Grow

Select a planting site under deciduous trees that offers rich, moist, well-drained loamy soil and deep shade after spring canopy leaf-out.
Dig planting holes to a depth of three to four inches (seven to ten centimeters) to accommodate the deep-seated growth habit of the corms.
Place the corms in the holes, cover with soil, and water thoroughly to settle the ground around the roots.
Apply a thin layer of natural leaf litter or organic compost over the planting area to mimic forest floor conditions and retain moisture.

Pro Tip

Plant corms immediately upon receipt at a depth of three inches; dry storage quickly dehydrates the corms and destroys their viability.

Keep It Thriving

Care Guide

Do

Allow the foliage to yellow and die back naturally in late spring to replenish the underground corm.
Top-dress the planting area with leaf mold or compost each fall to maintain soil organic matter.
Plant corms immediately after lifting or purchasing to prevent fatal dehydration.

Don't

Do not cut back green foliage prematurely before summer dormancy begins.
Do not clear away natural leaf litter from the planting bed in spring or fall.
Do not plant in heavy, poorly drained clay soils prone to waterlogging.
Do not attempt to transplant actively growing plants late in the spring season.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Woodland GardenUnderstory PlantingShade BorderNaturalized Area

Companion Plants

Trillium grandiflorum Asarum canadense Dicentra cucullaria Sanguinaria canadensis

Multiply

Propagation Methods

Good to Know

Common Questions

Yellow Trout-lily questions

What zones can Yellow Trout-lily grow in?

Yellow Trout-lily is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Yellow Trout-lily deer resistant?

Not reliably. Deer may browse Yellow Trout-lily, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Yellow Trout-lily bloom?

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

Does Yellow Trout-lily need full sun?

Yellow Trout-lily does best in part shade.