North America Native Plant

Tanseyleaf Tansyaster

Botanical name: Machaeranthera tanacetifolia

USDA symbol: MATA2

Life cycle: annual

Habit: forb

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

Synonyms: Aster tanacetifolius Kunth (ASTA4)  âš˜  Machaeranthera coronopifolia (Nutt.) A. Nelson (MACO15)  âš˜  Machaeranthera parthenium Greene (MAPA11)   

Tanseyleaf Tansyaster: A Hardy Native Wildflower for Low-Maintenance Gardens If you’re looking for a cheerful, no-fuss native wildflower that practically grows itself, let me introduce you to the tanseyleaf tansyaster (Machaeranthera tanacetifolia). This delightful little plant might have a tongue-twisting name, but it’s surprisingly easy to love—and even easier to ...

Tanseyleaf Tansyaster: A Hardy Native Wildflower for Low-Maintenance Gardens

If you’re looking for a cheerful, no-fuss native wildflower that practically grows itself, let me introduce you to the tanseyleaf tansyaster (Machaeranthera tanacetifolia). This delightful little plant might have a tongue-twisting name, but it’s surprisingly easy to love—and even easier to grow!

What Makes Tanseyleaf Tansyaster Special?

The tanseyleaf tansyaster is a true North American native, naturally occurring across a impressive range from Canada down through 15 U.S. states, including Arizona, Colorado, Montana, Texas, and Wyoming. This widespread distribution is a testament to its adaptability and resilience.

As an annual or biennial forb, this plant completes its life cycle relatively quickly but often self-seeds to ensure future generations. It’s like having a reliable friend who always shows up to the party—sometimes invited, sometimes not, but always welcome!

Garden Appeal and Landscape Role

Don’t let its modest 2-foot height fool you—tanseyleaf tansyaster packs plenty of visual punch. The plant produces lovely purple, daisy-like flowers that are quite conspicuous when in bloom during late spring. Its finely divided, medium-textured green foliage resembles that of tansy (hence the name), creating an attractive ferny backdrop for the cheerful blooms.

This native wildflower shines in:

  • Native plant gardens
  • Prairie restorations
  • Xeriscapes and drought-tolerant landscapes
  • Naturalized wildflower meadows
  • Informal garden borders

Perfect Growing Conditions

One of the best things about tanseyleaf tansyaster is its easygoing nature. This plant thrives in full sun and actually prefers lean soils with low fertility requirements. It’s adapted to medium-textured soils and can handle pH levels between 6.5 and 8.5—pretty accommodating for most garden situations!

Key growing preferences include:

  • Sunlight: Full sun (shade intolerant)
  • Water needs: Medium drought tolerance—perfect for water-wise gardening
  • Soil: Medium-textured soils, low fertility requirements
  • Climate: Handles temperatures as low as -33°F and needs at least 110 frost-free days
  • Precipitation: Thrives with 16-24 inches of annual rainfall

Planting and Care Tips

Here’s where tanseyleaf tansyaster really wins gardeners over—it’s incredibly low-maintenance! The easiest way to establish this plant is by direct seeding, as it propagates readily from seed. With about 408,240 seeds per pound, a little goes a long way.

Growing tips for success:

  • Seeding: Direct sow seeds in spring; no cold stratification required
  • Growth rate: Rapid growth during active growing period (spring and summer)
  • Spacing: Allow room for the single-crown growth form
  • Maintenance: Minimal care needed once established
  • Self-seeding: Will often self-sow for future years, though at a slow spread rate

Wildlife and Pollinator Benefits

While specific wildlife data isn’t available for this species, purple-flowered natives like tanseyleaf tansyaster typically attract a variety of beneficial insects. The conspicuous purple flowers bloom during late spring when many pollinators are actively foraging, making this plant a valuable addition to pollinator-friendly gardens.

Why Choose Tanseyleaf Tansyaster?

This native wildflower checks all the boxes for gardeners seeking low-maintenance, environmentally responsible plants. It’s drought-tolerant, requires minimal fertilization, grows quickly, and supports local ecosystems. Plus, with its commercial availability listed as routinely available, you shouldn’t have trouble finding seeds.

The tanseyleaf tansyaster proves that native doesn’t mean boring—sometimes it means perfectly adapted, beautifully simple, and wonderfully reliable. In a world of high-maintenance garden divas, this little wildflower is refreshingly down-to-earth.

Whether you’re creating a prairie-style landscape, adding to an existing native plant collection, or simply want a pretty purple flower that takes care of itself, tanseyleaf tansyaster deserves a spot in your garden planning. After all, any plant that can thrive across such a wide range of conditions while asking for so little in return is definitely worth getting to know!

How

Tanseyleaf Tansyaster

Grows

Growing season

Spring and Summer

Lifespan
Growth form & shape

Single Crown and Erect

Growth rate

Rapid

Height at 20 years
Maximum height

2.0

Foliage color

Green

Summer foliage density

Porous

Winter foliage density

Porous

Foliage retention

No

Flowering

Yes

Flower color

Purple

Fruit/seeds

No

Fruit/seed color

Brown

Allelopath

No

Nitrogen fixing

None

Toxic

None

C:N Ratio

Low

Fire Resistant

No

Foliage Texture

Medium

Low-growing Grass

No

Resproutability

No

Coppice Ability

No

Bloat

None

Tanseyleaf Tansyaster

Growing Conditions

Adapted to Coarse Soil

No

Adapted to Medium Soil

Yes

Adapted to Fine Soil

No

Anaerobic tolerance

None

CaCO₃ tolerance

High

Cold Stratification

No

Drought tolerance

Medium

Nutrient requirement

Low

Fire tolerance

None

Frost-free days minimum

110

Hedge tolerance

None

Moisture requirement

Medium

pH range

6.5 to 8.5

Plants per acre
Precipitation range (in)

16 to 24

Min root depth (in)

8

Salt tolerance

Low

Shade tolerance

Intolerant

Min temperature (F)

-33

Cultivating

Tanseyleaf Tansyaster

Flowering season

Late Spring

Commercial availability

Routinely Available

Fruit/seed abundance

Medium

Fruit/seed season

Summer to Summer

Fruit/seed persistence

No

Propagated by bare root

No

Propagated by bulb

No

Propagated by container

No

Propagated by corm

No

Propagated by cuttings

No

Propagated by seed

Yes

Propagated by sod

No

Propagated by sprigs

No

Propagated by tubers

No

Seed per pound

408240

Seed spread rate

Slow

Seedling vigor

Medium

Small grain

No

Vegetative spread rate

None

Tanseyleaf Tansyaster

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

Machaeranthera Nees - tansyaster

Species

Machaeranthera tanacetifolia (Kunth) Nees - tanseyleaf tansyaster

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