North America Native Plant

Flatcrown Buckwheat

Botanical name: Eriogonum deflexum var. baratum

USDA symbol: ERDEB

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Eriogonum barbatum Elmer (ERBA8)  âš˜  Eriogonum deflexum Torr. ssp. baratum (Elmer) Munz (ERDEB3)   

Flatcrown Buckwheat: A Tiny Desert Gem for Water-Wise Gardens If you’re looking to add authentic southwestern charm to your garden while supporting local ecosystems, flatcrown buckwheat (Eriogonum deflexum var. baratum) might just be the unsung hero your landscape needs. This petite annual wildflower may not make bold statements like showy ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3T4: Status is uncertain but is somewhere between the following rankings: 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. ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Flatcrown Buckwheat: A Tiny Desert Gem for Water-Wise Gardens

If you’re looking to add authentic southwestern charm to your garden while supporting local ecosystems, flatcrown buckwheat (Eriogonum deflexum var. baratum) might just be the unsung hero your landscape needs. This petite annual wildflower may not make bold statements like showy perennials, but it brings its own quiet magic to desert gardens and water-wise landscapes.

What Makes Flatcrown Buckwheat Special?

Flatcrown buckwheat is a true native of the American Southwest, calling California and Nevada home. As a member of the buckwheat family, this little annual forb stays close to the ground with a prostrate, spreading growth habit. Don’t let its humble size fool you – this plant is perfectly adapted to thrive in some of the harshest conditions nature can dish out.

The plant produces clusters of tiny white to pink flowers that may seem modest at first glance, but they’re absolutely beloved by small native pollinators. Think of it as nature’s version of a neighborhood café – small, unpretentious, but always buzzing with activity.

Why Grow Flatcrown Buckwheat?

Here are compelling reasons to consider adding this native gem to your garden:

  • Water-wise champion: Once established, it requires minimal irrigation, making it perfect for drought-tolerant landscapes
  • Native pollinator magnet: Small bees, flies, and other beneficial insects flock to its tiny blooms
  • Authentic regional character: Adds genuine southwestern desert ambiance to your garden
  • Low-maintenance: As an annual, it completes its life cycle naturally without requiring perennial care
  • Soil tolerance: Thrives in poor, sandy, or rocky soils where other plants struggle

Important Conservation Note

Flatcrown buckwheat has a conservation status that deserves attention – it’s classified as S5T3T4, indicating it may be uncommon in parts of its range. If you decide to grow this plant, please source seeds or plants from reputable native plant nurseries that use responsibly collected material. Never collect from wild populations.

Perfect Garden Settings

This little buckwheat shines brightest in:

  • Desert gardens: Provides authentic groundcover alongside cacti and other succulents
  • Rock gardens: Softens harsh stone features with delicate flowers
  • Xerophytic landscapes: Fills in spaces between drought-tolerant shrubs
  • Native plant gardens: Represents the subtle beauty of regional flora
  • Naturalized areas: Creates habitat for small wildlife and pollinators

Growing Flatcrown Buckwheat Successfully

Growing this desert native is refreshingly straightforward once you understand its preferences:

Climate and Hardiness

Flatcrown buckwheat thrives in USDA hardiness zones 8-10, making it suitable for warm, arid regions. It’s naturally adapted to the temperature extremes and low humidity of southwestern deserts.

Soil Requirements

This plant actually prefers poor soils! Sandy, rocky, or gravelly soil with excellent drainage is ideal. Avoid rich, amended soils that retain moisture – they can actually harm this drought-adapted species.

Sun and Water Needs

Full sun is essential for healthy growth and flowering. Once established, water sparingly. Overwatering is one of the quickest ways to lose this plant, as it’s adapted to survive on minimal rainfall.

Planting Tips

Since flatcrown buckwheat is an annual, direct seeding in fall typically works best. The seeds need cool, moist conditions to germinate, then the plants will grow and flower the following spring before completing their life cycle.

What to Expect

Don’t expect dramatic height or bold colors from flatcrown buckwheat. Instead, appreciate its subtle charm – the way it hugs the ground, creating a living carpet dotted with tiny starlike flowers. Its prostrate form makes it an excellent living mulch around taller desert plants.

The real show happens when you observe it closely. Watch for the parade of small pollinators that visit throughout its blooming season, and notice how it adds textural interest to harsh desert landscapes.

The Bottom Line

Flatcrown buckwheat isn’t for every garden or every gardener. If you prefer bold, colorful displays or high-maintenance showstoppers, this might not be your plant. But if you’re drawn to subtle native beauty, want to support local ecosystems, and appreciate plants that thrive with minimal intervention, flatcrown buckwheat could become one of your favorite discoveries.

Remember to source it responsibly due to its conservation status, and give it the well-draining, sunny conditions it craves. In return, you’ll have a piece of authentic southwestern desert right in your own landscape – plus the satisfaction of knowing you’re providing habitat for native pollinators and preserving regional plant heritage.

Flatcrown 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 deflexum Torr. - flatcrown buckwheat

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