North America Native Plant

Twotooth Buckwheat

Botanical name: Eriogonum viridescens

USDA symbol: ERVI12

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Eriogonum angulosum Benth. ssp. viridescens (A. Heller) S. Stokes (ERANV)  âš˜  Eriogonum bidentatum Jeps. (ERBI4)   

Twotooth Buckwheat: A Charming California Native for Water-Wise Gardens If you’re looking for a low-maintenance native plant that brings both beauty and ecological benefits to your California garden, let me introduce you to twotooth buckwheat (Eriogonum viridescens). This delightful perennial might not be the showiest plant in the garden center, ...

Rare plant alert!

Region: Conservation status by state

Status: S3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ 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 ⚘

Twotooth Buckwheat: A Charming California Native for Water-Wise Gardens

If you’re looking for a low-maintenance native plant that brings both beauty and ecological benefits to your California garden, let me introduce you to twotooth buckwheat (Eriogonum viridescens). This delightful perennial might not be the showiest plant in the garden center, but it’s got character, resilience, and a whole lot of charm packed into its compact form.

What Makes Twotooth Buckwheat Special?

Twotooth buckwheat is a true California native, found exclusively in San Diego County where it naturally grows in coastal sage scrub and chaparral communities. As a forb (think of it as a non-woody perennial), this plant stays relatively low to the ground and spreads to form attractive patches of silvery-green foliage topped with clusters of small, delicate flowers.

The flowers typically bloom in shades of white to soft pink, creating a subtle but lovely display that pollinators absolutely adore. Don’t expect flashy, oversized blooms – this plant’s beauty lies in its understated elegance and the way it weaves seamlessly into naturalistic garden designs.

Where Does It Grow?

This buckwheat species is endemic to California, specifically the coastal regions of San Diego County. It’s perfectly adapted to the Mediterranean climate of Southern California, thriving in areas with mild, wet winters and hot, dry summers.

A Word About Conservation

Here’s something important to know: twotooth buckwheat has a conservation status that suggests it may be of concern (listed as S3?, meaning the status is somewhat uncertain but potentially vulnerable). This doesn’t mean you shouldn’t grow it – quite the opposite! Growing native plants in our gardens can actually help support local ecosystems. However, it does mean you should source your plants responsibly from reputable native plant nurseries rather than collecting from the wild.

Perfect for Water-Wise Gardens

If you’re tired of fighting with thirsty, high-maintenance plants, twotooth buckwheat might just become your new best friend. This drought-tolerant native is ideal for:

  • Native plant gardens
  • Xeriscape and drought-tolerant landscapes
  • Rock gardens and Mediterranean-style designs
  • Ground cover in naturalistic settings
  • Pollinator gardens

Growing Conditions and Care

Twotooth buckwheat is refreshingly easy to please once you understand its preferences. This plant thrives in USDA hardiness zones 9-11, making it perfect for Southern California gardens.

Sunlight: Give it full sun – this plant loves basking in bright California sunshine all day long.

Soil: Well-draining soil is absolutely essential. This plant cannot tolerate soggy conditions, so if you have heavy clay soil, consider amending it with sand and organic matter or planting in raised beds.

Water: Once established (usually after the first year), twotooth buckwheat is remarkably drought tolerant. During establishment, provide occasional deep watering, but once it’s settled in, it can survive on rainfall alone in most years.

Planting and Care Tips

Getting twotooth buckwheat established in your garden is straightforward:

  • Plant in fall or early spring for best establishment
  • Space plants according to their mature spread (check with your nursery for specific spacing recommendations)
  • Water regularly the first year, then gradually reduce as the plant establishes
  • Avoid fertilizers – like most natives, it prefers lean soils
  • Minimal pruning needed; just remove spent flowers if desired

Pollinator Paradise

One of the best reasons to plant twotooth buckwheat is its value to local wildlife. The flowers attract a variety of native bees, butterflies, and other beneficial insects. By including this plant in your garden, you’re creating habitat and food sources for the creatures that make our ecosystems thrive.

Should You Plant It?

If you live in Southern California and want to create a beautiful, low-maintenance, environmentally beneficial garden, twotooth buckwheat deserves serious consideration. Just remember to purchase from reputable sources that propagate their plants rather than wild-collecting them.

This charming native proves that sometimes the most rewarding garden plants are the ones that ask for very little while giving back so much to the local ecosystem. In a world where water conservation and supporting biodiversity are increasingly important, twotooth buckwheat offers a perfect way to garden responsibly while enjoying natural beauty right outside your door.

Twotooth 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 viridescens A. Heller - twotooth buckwheat

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