North America Native Plant

Thompson’s Buckwheat

Botanical name: Eriogonum thompsoniae var. albiflorum

USDA symbol: ERTHA

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Eriogonum corymbosum Benth. var. albiflorum (Reveal) S.L. Welsh (ERCOA2)   

Thompson’s Buckwheat: A Desert Gem for Water-Wise Gardens If you’re looking to add a touch of understated elegance to your drought-tolerant landscape, Thompson’s buckwheat might just be the perfect plant you’ve been searching for. This charming native perennial brings delicate beauty to challenging garden spots while requiring virtually no pampering ...

Rare plant alert!

Region: Conservation status by state

Status: S4T2T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Subspecies or variety is vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals. ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

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

If you’re looking to add a touch of understated elegance to your drought-tolerant landscape, Thompson’s buckwheat might just be the perfect plant you’ve been searching for. This charming native perennial brings delicate beauty to challenging garden spots while requiring virtually no pampering once it’s settled in.

What Is Thompson’s Buckwheat?

Thompson’s buckwheat (Eriogonum thompsoniae var. albiflorum) is a native perennial herb that calls the desert regions of Arizona and Utah home. As a member of the buckwheat family, this hardy little plant has adapted beautifully to life in some of the most challenging growing conditions North America has to offer.

Unlike its woody cousins, Thompson’s buckwheat is classified as a forb herb – essentially a non-woody perennial that dies back to ground level each winter, only to emerge fresh and ready for another growing season when conditions are right.

Where Does It Grow Naturally?

This desert native has carved out its niche in the southwestern United States, specifically thriving in the arid landscapes of Arizona and Utah. Here, it has spent countless generations perfecting the art of surviving – and thriving – in conditions that would challenge many other plants.

Why Consider Thompson’s Buckwheat for Your Garden?

There are several compelling reasons to give this native plant a spot in your landscape:

  • Water-wise wonder: Once established, it requires minimal supplemental watering
  • Pollinator magnet: The delicate white flower clusters attract native bees, butterflies, and other beneficial insects
  • Low maintenance: This is definitely a plant it and forget it kind of perennial
  • Native heritage: Supporting local ecosystems by choosing indigenous plants
  • Unique beauty: The silvery-green foliage and flat-topped white flower clusters add subtle charm

Important Conservation Note

Before you rush out to find Thompson’s buckwheat, there’s something important to know: this variety has a conservation status that suggests it may be somewhat rare in parts of its range. If you’re interested in growing this plant, make sure you source it from reputable native plant nurseries that propagate their stock rather than wild-collecting. This way, you can enjoy this beautiful native while helping to preserve wild populations for future generations.

Perfect Garden Settings

Thompson’s buckwheat shines brightest in:

  • Rock gardens where its compact form complements stone features
  • Xeriscaping projects focused on water conservation
  • Native plant gardens celebrating regional flora
  • Desert-themed landscapes
  • Naturalized areas where you want low-maintenance ground cover

Growing Conditions and Care

The beauty of Thompson’s buckwheat lies in its simplicity. This plant thrives in conditions that might stress other perennials:

  • Sunlight: Full sun is essential – this desert native needs those bright rays
  • Soil: Well-draining sandy or rocky soil is ideal; avoid heavy clay or constantly moist conditions
  • Water: Drought-tolerant once established, requiring only occasional deep watering during extended dry periods
  • Climate: Hardy in USDA zones 4-8, handling both cold winters and hot summers

Planting and Establishment Tips

Getting Thompson’s buckwheat off to a good start is straightforward:

  • Plant in spring or fall when temperatures are moderate
  • Ensure excellent drainage – this is non-negotiable for desert natives
  • Water regularly during the first growing season to help establishment
  • Once established, reduce watering significantly
  • Avoid fertilizing – these plants are adapted to lean soils
  • Allow natural winter die-back; new growth will emerge in spring

Supporting Wildlife

While Thompson’s buckwheat may look delicate, it’s a powerhouse when it comes to supporting local wildlife. The white flower clusters provide nectar for various pollinators, making your garden a valuable stopping point for native bees and butterflies. This creates a lovely cycle where you get to enjoy watching wildlife while supporting your local ecosystem.

Is Thompson’s Buckwheat Right for You?

This native beauty is perfect for gardeners who appreciate subtle elegance over flashy blooms and want to create sustainable, low-maintenance landscapes. If you’re working with challenging, dry conditions and want to support native wildlife while conserving water, Thompson’s buckwheat could be an excellent choice.

Just remember to source your plants responsibly and give them the well-draining conditions they crave. With minimal care and the right growing conditions, this charming desert native will reward you with years of understated beauty and the satisfaction of supporting your local ecosystem.

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