North America Non-native Plant

Broadbeaked Mustard

Botanical name: Brassica narinosa

USDA symbol: BRNA3

Native status: Not native but doesn't reproduce and persist in the wild

Broadbeaked Mustard: A Mystery Plant Worth Understanding If you’ve stumbled across the name broadbeaked mustard or its scientific name Brassica narinosa while researching native plants, you might find yourself scratching your head. This particular member of the mustard family is something of an enigma in the gardening world, with limited ...

Broadbeaked Mustard: A Mystery Plant Worth Understanding

If you’ve stumbled across the name broadbeaked mustard or its scientific name Brassica narinosa while researching native plants, you might find yourself scratching your head. This particular member of the mustard family is something of an enigma in the gardening world, with limited reliable information available about its characteristics, native range, and growing requirements.

What We Know (And Don’t Know) About Broadbeaked Mustard

Brassica narinosa, commonly called broadbeaked mustard, belongs to the large and diverse Brassica family – the same group that gives us familiar vegetables like broccoli, cabbage, and kale. However, unlike its well-documented cousins, this particular species remains poorly understood in terms of its:

  • Native geographic distribution
  • Growth habits and mature size
  • Preferred growing conditions
  • Wildlife and pollinator benefits
  • Conservation status

This lack of readily available information makes it challenging for home gardeners to make informed decisions about whether to include it in their landscapes.

The Challenge for Home Gardeners

When considering any plant for your garden, especially one with limited documentation, it’s important to understand both its potential benefits and risks. Without clear information about broadbeaked mustard’s native status, growth habits, or ecological impact, it’s difficult to recommend it as a reliable choice for home landscapes.

The uncertainty surrounding this species raises several important questions:

  • Is it truly native to your region?
  • Could it have invasive tendencies?
  • What growing conditions does it actually prefer?
  • How does it interact with local wildlife and pollinators?

Better Alternatives for Your Garden

Instead of taking a chance on a poorly documented species, consider these well-researched native alternatives from the mustard family that offer similar characteristics with known benefits:

  • Wild Mustard (Brassica kaber) – A native annual with bright yellow flowers that attracts beneficial insects
  • Garlic Mustard alternatives – Various native species that provide similar ecosystem functions without invasive risks
  • Native Crucifers – Regional native plants in the mustard family that are well-adapted to local conditions

If You’re Determined to Try It

Should you decide to experiment with broadbeaked mustard despite the limited information, approach it with caution:

  • Start with a small test area to observe its behavior
  • Monitor its growth patterns and spreading habits closely
  • Be prepared to remove it if it shows aggressive or invasive tendencies
  • Source seeds or plants only from reputable, local native plant suppliers
  • Consult with local botanists, extension offices, or native plant societies for region-specific advice

The Bottom Line

While the mystery surrounding Brassica narinosa might intrigue curious gardeners, the lack of reliable information makes it a risky choice for most home landscapes. Your garden – and local ecosystem – will likely benefit more from choosing well-documented native plants with proven track records of supporting local wildlife while behaving predictably in cultivation.

Before adding any unfamiliar species to your garden, especially one with limited documentation, consider consulting with local native plant experts, extension services, or botanical institutions. They can help you identify the best native alternatives that will thrive in your specific conditions while supporting your local ecosystem.

Remember, successful native gardening is built on choosing the right plants for your specific location and conditions – and that’s much easier to do when you have solid information to guide your decisions!

Broadbeaked Mustard

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

Brassica L. - mustard

Species

Brassica narinosa L.H. Bailey - broadbeaked mustard

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