North America Native Plant

Thompson’s Buckwheat

Botanical name: Eriogonum thompsoniae var. thompsoniae

USDA symbol: ERTHT

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Eriogonum corymbosum Benth. var. thompsoniae (S. Watson) S.L. Welsh (ERCOT4)   

Thompson’s Buckwheat: A Desert Gem for Water-Wise Gardens Looking for a tough, drought-tolerant native plant that won’t quit on you when the going gets dry? Meet Thompson’s buckwheat (Eriogonum thompsoniae var. thompsoniae), a charming little powerhouse that’s perfectly suited for gardeners who want beauty without the water bill. This unassuming ...

Thompson’s Buckwheat: A Desert Gem for Water-Wise Gardens

Looking for a tough, drought-tolerant native plant that won’t quit on you when the going gets dry? Meet Thompson’s buckwheat (Eriogonum thompsoniae var. thompsoniae), a charming little powerhouse that’s perfectly suited for gardeners who want beauty without the water bill. This unassuming perennial might just become your new favorite low-maintenance companion.

What Makes Thompson’s Buckwheat Special?

Thompson’s buckwheat is a native perennial forb that belongs to the true American Southwest. Unlike woody shrubs or trees, this herbaceous plant stays relatively low to the ground while packing a surprising punch of visual appeal. Don’t let its modest stature fool you – this little trooper has been thriving in some of the harshest conditions nature can dish out.

You might also see this plant referenced by its botanical synonym, Eriogonum corymbosum var. thompsoniae, but whatever you call it, you’re getting the same reliable performer.

Where Thompson’s Buckwheat Calls Home

This southwestern native has made itself comfortable across Arizona and Utah, where it’s learned to thrive in the challenging desert and high-desert environments. As a plant native to the lower 48 states, it’s perfectly adapted to the unique conditions of the American Southwest.

Why Your Garden Will Love Thompson’s Buckwheat

There are plenty of reasons to fall for this desert darling:

  • Drought tolerance: Once established, this plant laughs in the face of dry conditions
  • Pollinator magnet: The clusters of small, delicate flowers are irresistible to bees, butterflies, and other beneficial insects
  • Low maintenance: Perfect for gardeners who want beauty without the constant fussing
  • Native credentials: Supporting local ecosystems while creating stunning landscapes
  • Attractive foliage: Gray-green leaves provide year-round interest even when not in bloom

Perfect Spots for Thompson’s Buckwheat

This adaptable native shines in several garden settings:

  • Rock gardens: Its low-growing habit makes it perfect for tucking between stones
  • Xeriscaping: A natural choice for water-wise landscape design
  • Native plant gardens: Pairs beautifully with other southwestern natives
  • Ground cover: Excellent for covering difficult slopes or areas where grass struggles

Growing Thompson’s Buckwheat Successfully

The beauty of Thompson’s buckwheat lies in its simplicity. This plant thrives in USDA hardiness zones 4-8, making it surprisingly adaptable to different climates.

Ideal Growing Conditions

  • Sunlight: Full sun is essential – this plant craves those bright, sunny spots
  • Soil: Well-draining sandy or rocky soil is perfect; avoid heavy clay or areas that stay wet
  • Water: Drought-tolerant once established, but appreciates occasional deep watering during extreme dry spells
  • Fertility: Don’t spoil it with rich soil – this plant actually prefers lean conditions

Planting and Care Tips

Getting Thompson’s buckwheat established is refreshingly straightforward:

  • Best planting time: Spring or fall when temperatures are moderate
  • Spacing: Give plants room to spread naturally
  • Initial watering: Water regularly the first season to help establish roots
  • Long-term care: Once established, step back and let nature take the wheel
  • Fertilizing: Skip it entirely – this plant doesn’t want or need extra nutrients

Supporting Pollinators and Wildlife

One of the most rewarding aspects of growing Thompson’s buckwheat is watching it come alive with pollinator activity. The small but abundant flowers provide nectar for native bees, butterflies, and other beneficial insects, making your garden a vital pit stop in their daily travels.

Is Thompson’s Buckwheat Right for Your Garden?

If you’re dreaming of a beautiful, low-maintenance garden that supports native wildlife while conserving water, Thompson’s buckwheat deserves a spot on your plant list. It’s particularly perfect for gardeners in the Southwest who want to embrace their region’s natural beauty rather than fighting against it.

This charming native proves that sometimes the best garden companions are the ones that ask for the least while giving back the most. Give Thompson’s buckwheat a try, and discover why gardeners across the Southwest are falling in love with this desert gem.

Thompson’s Buckwheat

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Polygonales

Family

Polygonaceae Juss. - Buckwheat family

Genus

Eriogonum Michx. - buckwheat

Species

Eriogonum thompsoniae S. Watson - Thompson's buckwheat

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