North America Non-native Plant

Smelly Wallflower

Botanical name: Erysimum odoratum

USDA symbol: EROD2

Life cycle: biennial

Habit: forb

Native status: Non-native, reproduces and persists in the wild in the lower 48 states  

Synonyms: Erysimum pannonicum Crantz (ERPA25)   

Smelly Wallflower: What You Need to Know About This Lesser-Known Garden Plant If you’ve stumbled across the name smelly wallflower in your gardening research, you might be wondering whether this oddly-named plant deserves a spot in your garden. With the botanical name Erysimum odoratum, this lesser-known member of the wallflower ...

Smelly Wallflower: What You Need to Know About This Lesser-Known Garden Plant

If you’ve stumbled across the name smelly wallflower in your gardening research, you might be wondering whether this oddly-named plant deserves a spot in your garden. With the botanical name Erysimum odoratum, this lesser-known member of the wallflower family has an admittedly unflattering common name, but don’t let that fool you into thinking it’s not worth considering.

The Basics: What Is Smelly Wallflower?

Smelly wallflower (Erysimum odoratum) is a forb—essentially a non-woody flowering plant that lacks the thick, woody stems you’d find on shrubs or trees. This biennial or perennial plant belongs to the mustard family and has been classified as a non-native species that has naturalized in parts of the United States.

You might also encounter this plant listed under its synonym, Erysimum pannonicum, so don’t be confused if you see both names floating around in gardening resources.

Where You’ll Find It

Currently, smelly wallflower has been documented growing in Massachusetts, though its presence may be more widespread than records indicate. As an introduced species, it has managed to establish itself and reproduce without human intervention in this region.

The Garden Reality Check

Here’s where things get a bit tricky for gardeners: there’s surprisingly little detailed information available about Erysimum odoratum specifically. While many of its wallflower cousins are well-documented garden favorites, this particular species seems to fly under the radar in most horticultural references.

What we do know is that as a forb, it’s likely to be a relatively low-growing plant that produces flowers, but specifics about its appearance, size, and growing requirements remain elusive in most gardening resources.

Should You Plant It?

Given that smelly wallflower is non-native and there’s limited information about its garden performance or ecological impact, you might want to consider some alternatives. If you’re drawn to the wallflower family, there are several well-documented native options that could serve your garden better:

  • Native mustard family plants that support local pollinators
  • Regional wildflowers with proven garden performance
  • Established perennial forbs native to your area

The Bottom Line

While smelly wallflower isn’t necessarily a plant to avoid, the lack of available growing information makes it a bit of a gamble for most gardeners. If you’re interested in supporting local ecosystems, focusing on well-documented native plants will give you more predictable results and greater environmental benefits.

That said, if you do encounter this plant growing wild in Massachusetts and are curious about its potential, observe how it behaves in its naturalized setting. Just remember that choosing native alternatives is generally the safer bet for both your garden’s success and your local ecosystem’s health.

The gardening world is full of mysteries, and Erysimum odoratum appears to be one of them. Sometimes the most interesting plants are the ones that keep a little mystery about themselves!

Smelly Wallflower

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Capparales

Family

Brassicaceae Burnett - Mustard family

Genus

Erysimum L. - wallflower

Species

Erysimum odoratum Ehrh. - smelly wallflower

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA