United States / Grow / Buckthorns

Buckthorns Frangula

This hub compares 3 species records. Across all 3 records, it carries 7 evidence rows from 6 distinct cited sources. The species split is 1 fire-resistant and 2 awaiting directional evidence. The species records remain separate: their evidence does not become one verdict for the genus.

Fire-resistant: 1 species

Cascara buckthorn Fire-resistant Frangula purshiana Consensus · 5 sources Zones 3–8

Awaiting evidence: 2 species

California buckthorn Awaiting evidence Frangula californica Limited evidence · 1 source
glossy buckthorn Awaiting evidence Frangula alnus Limited evidence · 1 source Zones 3–3

About buckthorns

Directory notes

Plant forms recorded in this group: shrub, tree. The records span published USDA zones 3–8. These are record-level fields, not a whole-genus flammability claim.

More about Frangula: Wikipedia — external references; not evidence sources.

Where rated buckthorns grow

Tagged as growing in 33 states.

See Frangula on Grow → · JSON