

Slender Buckwheat Eriogonum microthecum
Slender Buckwheat is a perennial shrub native to the lower 48 states. It grows to 1.1 ft and blooms Jul in part shade – shade, with brown fruit. A host for pollen-specialist native bees.
More about this plant
Eriogonum microthecum is a species of wild buckwheat known by the common name slender buckwheat. It is native to the western United States where it is found in a variety of habitats, particularly in dry areas such as deserts. Wikipedia →
Growing & care
USDA PLANTS · TRY- Sun
- Part shade – shade
- Soil & moisture
- Low moisture
- Soil pH
- 5.8–8.5
- Fertility need
- Low
- Adapts to
- Coarse (sandy), Medium (loam)
- Hardiness
- USDA zone 4+
- Height
- 1.1 ft
- Spacing
- 2.5–4 ft apart from USDA planting density
- Spread
- None — clumping
- Growth rate
- Moderate
- Growth form
- Single crown
- Lifespan
- Perennial · long-lived
- Foliage
- Evergreen broadleaf · fine texture
- Active growth
- Spring & summer
- Fruit
- Brown
- Propagate by
- Seed, Bare root, Container
- Seed starting
- Needs cold stratification a cold-moist spell before it germinates
- Seeds ripen
- Summer – Autumn seed-collection / harvest window
- In the trade
- No known commercial source
- Deer browsing
- Low often deer-resistant
- Resprouts if cut
- Yes regrows after top-kill
Sow timing keys off your local last- and first-frost dates.
Wildlife & pollinators
How pollinator value is scored →❧ Caterpillar hosts ~9 caterpillar species
Eriogonum supports ~9 caterpillar species.
Native butterfly & moth caterpillars are the base of the terrestrial food web — most songbirds rear their young almost entirely on them. As a host for native Lepidoptera this is a modest genus.
Recorded feeding on Eriogonum in North America, including:
+ 8 more species → ↑ show fewer
✦ Bees specialist-bee host
Specialist native bees depend on it.
Some native bees are pollen specialists (oligolectic) — they raise young only on pollen from particular plant genera. Eriogonum is a recorded specialist-bee host, so losing it can mean losing the bee that relies on it.
How we know this (1) Methods & honest limits
A recorded categorical fact: each species is tagged C3 (standard), C4 (heat/water-efficient) or CAM (succulent, night-time CO₂ uptake) — or a facultative combination. We only show a trait card for the noteworthy C4/CAM cases; C3 is the unremarkable majority, kept in the data but not surfaced as a card.
Sources for this entry (28) Open & cited
Cite this page Open data, please attribute
PlantKey’s data is open under CC BY-SA 4.0 — free to reuse and adapt, with attribution and the same licence. Photos keep their own per-image licence + credit (see Sources above).
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