North America Native Plant

Smooth Yellow False Foxglove

Botanical name: Aureolaria flava var. macrantha

USDA symbol: AUFLM

Life cycle: perennial

Habit: forb

Native status: Native to Canada âš˜ Native to the lower 48 states  

Synonyms: Agalinis flava (L.) B. Boivin var. macrantha (Pennell) B. Boivin (AGFLM)  âš˜  Aureolaria flava (L.) Farw. ssp. macrantha Pennell (AUFLM2)  âš˜  Gerardia flava L. var. macrantha (Pennell) Fernald (GEFLM)   

Smooth Yellow False Foxglove: A Golden Native Wildflower for Your Garden Meet the smooth yellow false foxglove (Aureolaria flava var. macrantha), a charming native perennial that brings sunshine to late-season gardens when many other wildflowers are calling it quits. This delightful plant might have a bit of a complicated name, ...

Smooth Yellow False Foxglove: A Golden Native Wildflower for Your Garden

Meet the smooth yellow false foxglove (Aureolaria flava var. macrantha), a charming native perennial that brings sunshine to late-season gardens when many other wildflowers are calling it quits. This delightful plant might have a bit of a complicated name, but don’t let that scare you away – it’s actually quite the garden gem once you get to know it!

What Makes This Plant Special?

The smooth yellow false foxglove is a true American native, naturally occurring across a wide swath of North America from southeastern Canada down through the eastern United States. You’ll find this beauty growing wild in states from New York and Pennsylvania all the way down to Texas and Louisiana, with populations scattered throughout the Midwest and Southeast including Alabama, Arkansas, Illinois, Indiana, Kentucky, Maryland, Mississippi, Missouri, North Carolina, Ohio, Tennessee, Virginia, and West Virginia, plus Ontario in Canada.

As a perennial, this plant will return year after year, making it a reliable addition to your native plant palette. What really sets it apart is its stunning display of bright yellow, trumpet-shaped flowers that bloom from late summer into fall – perfect timing to bridge the gap between summer blooms and autumn’s grand finale.

Why Gardeners Love (and Sometimes Struggle With) This Plant

Here’s where things get interesting: the smooth yellow false foxglove is what botanists call semi-parasitic. Before you panic, this doesn’t mean it’s going to take over your garden like some botanical villain! Instead, it means this clever plant has evolved to tap into the root systems of nearby trees – particularly oaks – to supplement its nutrition. Think of it as nature’s version of a helpful neighbor who occasionally borrows a cup of sugar.

This unique growing habit is both a blessing and a challenge for gardeners:

  • The good news: Once established with proper host plants nearby, it’s quite low-maintenance
  • The consideration: You’ll need oak trees or other suitable woody hosts within root reach for best results
  • The payoff: Gorgeous yellow blooms that attract bees, butterflies, and even hummingbirds

Perfect Garden Companions and Settings

This native wildflower shines brightest in naturalized settings and native plant gardens. It’s particularly at home in:

  • Woodland edge gardens
  • Prairie restoration projects
  • Native pollinator gardens
  • Naturalized landscapes with mature trees

The smooth yellow false foxglove thrives in USDA hardiness zones 4 through 8, making it suitable for a wide range of climates across its native range.

Growing Conditions and Care Tips

Unlike many wildflowers that prefer full blazing sun, the smooth yellow false foxglove is quite adaptable when it comes to light conditions. It will happily grow in partial shade to full sun, though it often performs best with some protection from the most intense afternoon heat.

For soil, think well-draining – this plant doesn’t appreciate soggy feet. Average garden soil works fine, and because of its semi-parasitic nature, you don’t need to worry much about fertilizing. In fact, too-rich soil might actually discourage the plant from forming those important root connections with its tree hosts.

The most crucial growing tip? Make sure you have oak trees or other compatible woody plants nearby. Without these host plants, your smooth yellow false foxglove may struggle to establish and thrive.

Planting and Establishment

Starting smooth yellow false foxglove can be a bit tricky due to its unique growing requirements. Here are some tips for success:

  • Plant near established oak trees or other native deciduous trees
  • Choose a spot with good drainage
  • Be patient – establishment may take a season or two as the plant forms root connections
  • Avoid disturbing the root zone once established

Wildlife and Pollinator Benefits

One of the biggest reasons to include smooth yellow false foxglove in your native garden is its value to local wildlife. The bright yellow flowers are magnets for:

  • Native bees seeking late-season nectar
  • Butterflies looking for fuel during migration
  • Occasionally hummingbirds, drawn to the tubular flower shape

By blooming later in the season when many other native flowers have finished, this plant provides crucial resources when pollinators need them most.

Is This Plant Right for Your Garden?

The smooth yellow false foxglove is an excellent choice if you’re looking to support native wildlife and don’t mind working with a plant that has some specific requirements. It’s particularly perfect if you already have mature oak trees on your property or nearby.

However, if you’re looking for a low-maintenance wildflower for a formal garden bed or don’t have suitable host trees available, you might want to consider other native alternatives like wild bergamot, purple coneflower, or black-eyed Susan.

For gardeners committed to native plant gardening and willing to work with nature’s intricate relationships, the smooth yellow false foxglove offers a unique opportunity to grow a truly special plant that showcases the fascinating connections within our native ecosystems. Plus, those cheerful yellow blooms are absolutely worth the extra effort!

Smooth Yellow False Foxglove

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Scrophulariales

Family

Scrophulariaceae Juss. - Figwort family

Genus

Aureolaria Raf. - false foxglove

Species

Aureolaria flava (L.) Farw. - smooth yellow false foxglove

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