North America Native Plant

Temblor Buckwheat

Botanical name: Eriogonum temblorense

USDA symbol: ERTE15

Life cycle: annual

Habit: forb

Native status: Native to the lower 48 states  

Temblor Buckwheat: A Rare California Native Worth Protecting If you’re looking to add a truly special California native to your garden, Temblor buckwheat (Eriogonum temblorense) might catch your eye. But before you start shopping for seeds, there’s something important you need to know about this charming little wildflower – it’s ...

Rare plant alert!

Region: Conservation status by state

Status: S2: Status is uncertain but is somewhere between the following rankings: 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) ⚘

Temblor Buckwheat: A Rare California Native Worth Protecting

If you’re looking to add a truly special California native to your garden, Temblor buckwheat (Eriogonum temblorense) might catch your eye. But before you start shopping for seeds, there’s something important you need to know about this charming little wildflower – it’s one of California’s rarest plants.

What Makes Temblor Buckwheat Special?

Temblor buckwheat is an annual forb that belongs to the diverse buckwheat family. This herbaceous plant produces delicate clusters of small flowers that range from white to soft pink, creating a lovely display during its growing season. As a member of the Eriogonum genus, it shares family ties with many other beloved western wildflowers, but this particular species has a very exclusive address.

A California Endemic with a Tiny Range

This native beauty calls only California home, and not just anywhere in the Golden State – it’s specifically found in the Temblor Range area of the San Joaquin Valley. Talk about being picky about your neighborhood! This extremely limited geographic distribution is part of what makes Temblor buckwheat so special and, unfortunately, so vulnerable.

The Reality Check: This Plant is Imperiled

Here’s where things get serious. Temblor buckwheat has a Global Conservation Status of S2, which means it’s imperiled. In plain English, this translates to extremely rare – we’re talking about only 6 to 20 known populations with somewhere between 1,000 to 3,000 individual plants in existence. That’s not many when you consider the vastness of California!

What does this mean for you as a gardener? If you’re determined to grow Temblor buckwheat, you absolutely must source it responsibly. This means purchasing only from reputable native plant nurseries that can guarantee their stock wasn’t collected from wild populations. Better yet, consider supporting conservation efforts for this species instead.

Garden Role and Growing Conditions

If you can source Temblor buckwheat responsibly, it makes a wonderful addition to:

  • Native California plant gardens
  • Drought-tolerant landscapes
  • Naturalistic plantings
  • Pollinator gardens

As an annual, don’t expect this plant to stick around year after year – it completes its entire life cycle in one growing season. However, if conditions are right and you allow some flowers to go to seed, you might get lucky with natural reseeding.

What Temblor Buckwheat Needs to Thrive

Like many California natives, Temblor buckwheat is adapted to challenging conditions. It prefers:

  • Well-draining soils (soggy feet are a no-go)
  • Full sun exposure
  • Minimal water once established
  • USDA hardiness zones 8-10

The key to success is remembering this plant evolved in California’s Mediterranean climate with wet winters and dry summers. Overwatering, especially during the dormant season, is likely to kill it faster than drought.

Wildlife and Pollinator Benefits

One of the best reasons to grow any buckwheat species is their value to pollinators. Temblor buckwheat’s small flowers are perfect landing pads for native bees, butterflies, and other beneficial insects. The plant’s nectar and pollen provide important food sources, while the seeds can feed small birds and wildlife.

Consider the Alternatives

Given Temblor buckwheat’s rarity, you might want to consider growing other California native buckwheat species that offer similar benefits without conservation concerns. California buckwheat (Eriogonum fasciculatum) or coast buckwheat (Eriogonum latifolium) are excellent choices that provide similar pollinator benefits and drought tolerance while being much more widely available.

The Bottom Line

Temblor buckwheat is undoubtedly a special plant that deserves our admiration and protection. While it can make a meaningful addition to the right garden, its rarity means we need to think carefully about how we approach growing it. If you do choose to include it in your landscape, make sure you’re supporting conservation rather than contributing to its decline. Sometimes the best way to appreciate a rare plant is to support its protection in the wild while choosing more common native alternatives for our gardens.

Temblor 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 temblorense J.T. Howell & Twisselmann - Temblor buckwheat

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