North America Non-native Plant

Alpine Pennycress

Botanical name: Noccaea montana

USDA symbol: NOMO2

Life cycle: perennial

Habit: forb

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

Alpine Pennycress: A Mountain Jewel for Specialized Gardens If you’re the type of gardener who gets excited about conquering challenging plants or creating an authentic alpine garden, then alpine pennycress (Noccaea montana) might just capture your heart. This tough little perennial forb has adapted to life in some of North ...

Alpine Pennycress: A Mountain Jewel for Specialized Gardens

If you’re the type of gardener who gets excited about conquering challenging plants or creating an authentic alpine garden, then alpine pennycress (Noccaea montana) might just capture your heart. This tough little perennial forb has adapted to life in some of North America’s most demanding environments, and bringing it into your garden is both a rewarding challenge and a tribute to our high-elevation ecosystems.

What is Alpine Pennycress?

Alpine pennycress is a perennial forb, meaning it’s a non-woody plant that returns year after year. Don’t let the word forb intimidate you – it’s simply botanist-speak for a flowering plant that isn’t a grass, sedge, or shrub. This mountain native produces clusters of small white flowers and maintains a compact, ground-hugging growth form that helps it survive harsh alpine conditions.

Where Does Alpine Pennycress Come From?

This hardy little plant calls the high elevations of western North America home, particularly thriving in the Rocky Mountains and similar mountain ranges. It’s perfectly adapted to life above the treeline, where most garden plants would simply give up and call it quits.

Why Grow Alpine Pennycress?

Here’s the thing about alpine pennycress – it’s not for every gardener, and that’s perfectly okay! This plant is ideal if you:

  • Have a passion for native plants and want to support local ecosystems
  • Are creating an authentic alpine or rock garden
  • Love the challenge of growing specialized plants
  • Live in a high-elevation area with naturally cool conditions
  • Want a conversation-starter plant that few neighbors will have

Garden Design Role

Alpine pennycress works best as a ground cover in rock gardens, alpine gardens, or specialized native plant collections. Its compact form and white flowers can provide subtle beauty among rocks and other alpine plants. Think of it as the supporting actor rather than the star of the show – it adds authenticity and ecological value without demanding center stage.

Growing Conditions and Care

Here’s where things get interesting (and potentially challenging). Alpine pennycress has some very specific needs:

  • Drainage: Excellent drainage is absolutely critical – think water runs away immediately level of drainage
  • Temperature: Prefers cool conditions and may struggle in hot, humid climates
  • Light: Full sun to partial shade
  • Soil: Well-draining, often rocky or gravelly soils
  • USDA Zones: Likely hardy in zones 3-6, though exact range may vary

Planting and Care Tips

If you’re determined to grow alpine pennycress, here are some tips for success:

  • Create a raised bed or rock garden with excellent drainage
  • Mix plenty of gravel or sand into your soil
  • Consider growing it in containers if your climate is too warm or humid
  • Source plants from reputable native plant nurseries
  • Be patient – alpine plants often grow slowly
  • Avoid overwatering and over-fertilizing

The Reality Check

Let’s be honest – alpine pennycress isn’t going to be the easiest plant in your garden. It’s specialized for extreme conditions that are hard to replicate in most home landscapes. If you’re new to gardening or prefer low-maintenance plants, you might want to start with more forgiving native options.

However, if you’re up for the challenge and have the right conditions, growing alpine pennycress can be incredibly rewarding. There’s something magical about successfully cultivating a plant that thrives on mountaintops.

Pollinator and Wildlife Benefits

While specific information about alpine pennycress’s wildlife benefits is limited, most native flowering plants provide some value to local ecosystems. The small white flowers likely attract small pollinators adapted to high-elevation environments.

Is Alpine Pennycress Right for You?

Choose alpine pennycress if you’re an experienced gardener looking for a challenge, have naturally cool and well-draining conditions, or are creating a specialized alpine garden. Skip it if you’re looking for easy-care plants or live in a hot, humid climate.

Remember, there’s no shame in admitting a plant isn’t right for your garden. Sometimes the most loving thing we can do for both ourselves and the plant is to choose species that will thrive in our specific conditions. Your garden will thank you for it!

Alpine Pennycress

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

Noccaea Moench - pennycress

Species

Noccaea montana (L.) F.K. Mey. [excluded] - alpine pennycress

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