North America Native Plant

Gray’s Feverfew

Botanical name: Parthenium confertum

USDA symbol: PACO11

Life cycle: biennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Parthenium confertum A. Gray var. confertum (PACOC)  âš˜  Parthenium confertum A. Gray var. divaricatum Rollins (PACOD)  âš˜  Parthenium confertum A. Gray var. intermedium Mears, ined. (PACOI)  âš˜  Parthenium confertum A. Gray var. lyratum (A. Gray) Rollins (PACOL)  âš˜  Parthenium confertum A. Gray var. microcephalum Rollins (PACOM)  âš˜  Parthenium hysterophorus L. var. lyratum A. Gray (PAHYL)  âš˜  Parthenium lyratum (A. Gray) A. Gray (PALY2)   

Gray’s Feverfew: A Southwestern Native Worth Getting to Know If you’re looking for a low-maintenance native plant that can handle the heat and still put on a charming show, Gray’s feverfew (Parthenium confertum) might just be your new garden buddy. This unassuming southwestern native doesn’t demand much attention, but it ...

Gray’s Feverfew: A Southwestern Native Worth Getting to Know

If you’re looking for a low-maintenance native plant that can handle the heat and still put on a charming show, Gray’s feverfew (Parthenium confertum) might just be your new garden buddy. This unassuming southwestern native doesn’t demand much attention, but it delivers plenty of benefits for both gardeners and wildlife.

What Exactly Is Gray’s Feverfew?

Gray’s feverfew is a native forb that calls the American Southwest home. As an herbaceous plant, it lacks the woody stems of shrubs and trees, instead growing as a soft-stemmed annual, biennial, or perennial depending on conditions. Don’t let its humble appearance fool you – this little powerhouse has been quietly supporting southwestern ecosystems for ages.

Where Does It Grow Naturally?

This hardy native has made itself at home across Arizona, New Mexico, and Texas. It’s perfectly adapted to the challenging conditions of the Southwest, from scorching summers to unpredictable rainfall patterns. If you live in USDA hardiness zones 7-10, you’re in Gray’s feverfew territory.

Why Your Garden (and Local Wildlife) Will Love It

Gray’s feverfew might not be the showiest plant in your garden, but it’s definitely one of the most reliable. Here’s what makes it special:

  • Wildlife magnet: Large animals like deer rely on it for 10-25% of their diet, and it occasionally provides cover for various creatures
  • Pollinator friendly: Its small, daisy-like white flowers attract native bees and other beneficial insects
  • Drought champion: Once established, it thrives with minimal water – perfect for xeriscaping
  • Low maintenance: This plant practically takes care of itself

What to Expect: Size and Appearance

Gray’s feverfew produces clusters of small, white flowers that have a delicate, daisy-like appearance. The silvery-gray foliage gives the plant its common name and creates a nice contrast in the garden. While specific height and width measurements vary with growing conditions, expect a modest-sized plant that fits well into naturalized settings.

Perfect Garden Roles

This versatile native works beautifully in several garden styles:

  • Wildflower gardens: Adds texture and attracts beneficial insects
  • Xeriscapes: Thrives in low-water landscapes
  • Native plant gardens: Supports local ecosystems
  • Naturalized areas: Perfect for low-maintenance spaces

Growing Gray’s Feverfew Successfully

The beauty of Gray’s feverfew lies in its simplicity. Here’s how to give it the best start:

Light and Location: Plant it in full sun where it can soak up those southwestern rays. It’s built for bright, open spaces.

Soil Requirements: Well-draining soil is crucial. This plant has zero tolerance for soggy feet, but it’s not picky about soil fertility.

Watering: Water during establishment, then step back. Once settled in, it prefers the tough love approach to watering.

Planting Tips: Direct seeding in fall works well, as the plant can self-seed readily once happy. This means you might get pleasant surprises in future seasons!

Is Gray’s Feverfew Right for Your Garden?

Gray’s feverfew is an excellent choice if you’re looking to support native wildlife, create a low-water garden, or simply want a reliable plant that doesn’t need babying. It’s particularly perfect for gardeners in the Southwest who want to work with their natural environment rather than against it.

While it might not be the star of your flower border, Gray’s feverfew is the kind of steady, dependable plant that forms the backbone of a thriving native garden. Plus, knowing that you’re providing food and habitat for local wildlife? That’s the kind of gardening karma we can all feel good about.

Ready to give this southwestern native a try? Your local wildlife – and your water bill – will thank you.

Wildlife Status

Want to attract wildlife or keep hungry critters away from your garden? Understanding the relationship between plants and wildlife is key. While plant tags may indicate deer and rabbit resistance, they don't tell the full story. Every gardener has experienced the disappointment of purchasing "deer-resistant" plants only to find them nibbled to the ground!

The extent to which plants are resistant to animal browsing is a matter of degree. Likewise, the extent to which a plant attracts wanted visitors also varies. Whether you want a garden full or free of wildlife, learning about interactions between a plant and wild animals can help you make smarter choices for the garden you desire.

As shown below Shrubby Indian Mallow isn't a large food source for animals or birds. You can confidently add this plant to your garden and rest assured knowing it's unlikely to be devoured by four-legged visitors.

Small animals

not a food source

not a source of cover

Large animals

Average 10-25% of diet

Occasional source of cover

Terrestrial birds

not a food source

not a source of cover

Water birds

not a food source

not a source of cover

Sources:

Everitt, J.H., D.L. Drawe, and R.I. Lonard. 1999. Field guide to the broad leaved herbaceous plants of South Texas used by livestock and wildlife. Texas Tech University Press. Lubbock.

Gray’s Feverfew

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

Asterales

Family

Asteraceae Bercht. & J. Presl - Aster family

Genus

Parthenium L. - feverfew

Species

Parthenium confertum A. Gray - Gray's feverfew

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