North America Native Plant

Thompson’s Buckwheat

Botanical name: Eriogonum thompsoniae

USDA symbol: ERTH2

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Thompson’s Buckwheat: A Desert Gem for Water-Wise Gardens If you’re looking for a tough, drought-tolerant native plant that doesn’t skimp on charm, let me introduce you to Thompson’s buckwheat (Eriogonum thompsoniae). This hardy little perennial might just be the perfect addition to your water-wise landscape – and your local pollinators ...

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

If you’re looking for a tough, drought-tolerant native plant that doesn’t skimp on charm, let me introduce you to Thompson’s buckwheat (Eriogonum thompsoniae). This hardy little perennial might just be the perfect addition to your water-wise landscape – and your local pollinators will thank you for it!

What Is Thompson’s Buckwheat?

Thompson’s buckwheat is a native perennial forb that’s perfectly adapted to life in the American Southwest. As a member of the buckwheat family, it’s built to thrive in conditions that would make other plants throw in the towel. This low-growing herb lacks woody stems but makes up for it with incredible resilience and understated beauty.

Where Does It Call Home?

This desert native is found naturally in Arizona and Utah, where it has spent countless years perfecting the art of surviving in harsh, arid conditions. In the wild, you’ll find it growing in desert washes, rocky slopes, and other well-draining spots where many plants fear to tread.

Why You’ll Love Growing Thompson’s Buckwheat

Here’s where this little plant really shines – it’s practically maintenance-free once established. Thompson’s buckwheat forms attractive, compact mounds adorned with clusters of small white to pinkish flowers that create a delicate, cloud-like effect in the garden. The silvery-green foliage provides year-round interest, even when the plant isn’t blooming.

But perhaps the best reason to grow this native gem? It’s a pollinator magnet! The flowers attract native bees, butterflies, and other beneficial insects, making your garden a buzzing hub of activity during blooming season.

Perfect Garden Scenarios

Thompson’s buckwheat is tailor-made for:

  • Xeriscape and drought-tolerant gardens
  • Rock gardens where it can nestle between stones
  • Desert-themed landscapes
  • Native plant gardens
  • Ground cover in dry, challenging areas
  • Low-maintenance landscape borders

Growing Conditions and Care

The secret to success with Thompson’s buckwheat is thinking like a desert plant. Here’s what it needs to thrive:

Sunlight: Full sun is essential – this plant has evolved to bask in intense southwestern sunshine.

Soil: Well-draining soil is absolutely critical. Sandy or rocky soils work best, and the plant actually prefers poor to moderate fertility over rich, heavy soils that retain moisture.

Water: Here’s the beauty of this plant – once established, it needs very little supplemental watering. In fact, overwatering is more likely to harm it than drought!

Climate: Hardy in USDA zones 5-9, Thompson’s buckwheat can handle both cold winters and scorching summers.

Planting and Care Tips

Getting started with Thompson’s buckwheat is refreshingly simple:

  • Plant in spring or fall when temperatures are moderate
  • Ensure excellent drainage – consider raised beds or slopes if your soil is heavy
  • Water regularly during the first growing season to help establish roots
  • After establishment, water sparingly or rely on natural rainfall
  • Avoid fertilizing – this plant thrives on neglect!
  • Deadhead spent flowers if desired, though many gardeners leave them for wildlife

A Wildlife-Friendly Choice

Beyond its low-maintenance appeal, Thompson’s buckwheat serves as an important food source for native wildlife. The flowers provide nectar for pollinators throughout the blooming season, while the seeds can feed birds and small mammals. By choosing this native plant, you’re supporting local ecosystems while creating a beautiful, sustainable garden.

The Bottom Line

Thompson’s buckwheat proves that sometimes the best plants are the ones that ask for the least. If you’re gardening in the Southwest, dealing with poor soils, or simply want to create a more sustainable landscape, this native beauty deserves a spot in your garden. It’s tough enough to handle whatever nature throws at it, pretty enough to earn compliments from visitors, and beneficial enough to make both pollinators and wildlife happy.

In a world of high-maintenance garden plants, Thompson’s buckwheat is a refreshing reminder that sometimes the most rewarding plants are the ones that simply ask you to step back and let them do what they do best – thrive on their own terms.

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