perennial

Siberian Wallflower

Erysimum x allionii

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Essentials

At a Glance

Plant Type

Perennial

Height

18 inches

Width

12 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8

Water

Drought-tolerant once established

Humidity

Prefers dry to moderate humidity

Lifespan

Biennial or short-lived perennial

Native To

Garden origin

Toxicity

Mildly toxic if ingested

The Story

Plant Bio

Erysimum x allionii is a perennial plant known for its striking yellow flowers and ability to thrive in a variety of soil types. This species is a hybrid known for its prolonged flowering period and resilience to drought conditions.

Bloom Period:

EarlyLate

Uses & Benefits:

Erysimum x allionii offers vibrant spring blooms and silvery foliage, enhancing rock gardens and borders with minimal maintenance.

Its drought tolerance makes it ideal for xeriscaping and water-wise gardens.

Provides nectar for pollinators early in the season and supports local biodiversity.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck seeds into well-drained soil in early spring for best germination.
Mist cuttings lightly to maintain humidity and encourage rooting.
Water regularly but avoid overwatering to prevent root rot.
Fertilize monthly with a balanced, slow-release fertilizer during growing season.
Prune after flowering to promote bushy growth and remove dead stems.
Mulch around plants to retain moisture and suppress weeds.

Pro Tip

Ensure excellent drainage as Erysimum x allionii thrives in rocky, well-drained soils with full sun.

Keep It Thriving

Care Guide

Do

Provide full sun for optimal flowering 🌞
Water moderately during dry spells 💧
Prune after flowering to maintain shape ✂️
Apply mulch to conserve moisture and reduce weeds 🌱
Use organic compost for healthy growth

Don't

Avoid overwatering which can lead to root rot ❌
Don’t plant in heavy clay soil without amendment
Never prune in late fall or winter ❌
Avoid excessive fertilizing which may cause legginess
Don’t ignore signs of pests or disease

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Propagate
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Rock garden with silvery foliageDrought-tolerant border with vibrant spring bloomsWildflower meadow for ecological benefits

Companion Plants

Sedum Lavender Echinacea Gaillardia Yarrow

Multiply

Propagation Methods

Good to Know

Common Questions

Siberian Wallflower questions

What zones can Siberian Wallflower grow in?

Siberian Wallflower is hardy in USDA Zones 5–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Siberian Wallflower deer resistant?

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

When does Siberian Wallflower bloom?

Siberian Wallflower 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 Siberian Wallflower need full sun?

Siberian Wallflower does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Siberian Wallflower drought tolerant?

Yes — once established (usually after the first full season), Siberian Wallflower handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.