California Buckwheat (Eriogonum fasciculatum)

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Sunlight Full sun exposure; tolerates reflected heat in arid regions; minimal shade tolerance

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Watering Drought-tolerant; water deeply only during extended multi-week dry spells; avoid frequent shallow watering

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Temperature Hardy to freezing winter temperatures; withstands extreme desert summer heat without damage

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Leaf: Narrow, silver-green, woolly, clustered at stem tips
Flower: Tiny white/pinkish blooms in dense flat-topped clusters that fade to rusty brown
Stem: Woody, branching, grayish-brown with peeling bark over time

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Watering

Water deeply once every 2–3 weeks if no natural rainfall

Fertilization

Optional diluted low-nitrogen feed once in early spring. No regular fertilization needed for established plants

Eggshell powder topdress：Crush dried eggshells into fine powder; sprinkle lightly on soil surface to boost calcium levels without overfeeding

Pruning

Trim back spent flower clusters in late autumn to encourage dense new growth the following season
Thin overcrowded inner branches in early spring to improve airflow and reduce pest risk
Remove dead wood annually to maintain a compact mounding form

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic to cats; no reported toxicity

Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact

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Culture: Symbolizes resilience in arid landscapes; valued for supporting native pollinator populations

Usage: Ornamental xeric garden plant; nectar source for bees, butterflies, and native bees