United States / Grow / Spruces

Spruces Picea

This hub compares 10 species records. Across all 11 records, it carries 220 evidence rows from 33 distinct cited sources. The species split is 1 fire-resistant, 6 keep-away, and 3 awaiting directional evidence. 1 genus-rank record is shown separately; genus-rank claims do not override a species record, and species evidence does not become one verdict for the genus.

Rated as a group: spruce Picea sp. Keep away Limited evidence 7 sources rate the genus as a whole. Species evidence never rolls upward into a genus verdict, and genus claims never override a species record. ›

Fire-resistant: 1 species

Serbian spruce Fire-resistant Picea omorika Limited evidence · 1 source Zones 4–7 genus-level claims ↑

Keep away: 6 species

Awaiting evidence: 3 species

About spruces

Directory notes

Plant forms recorded in this group: tree. The records span published USDA zones 1–7. These are record-level fields, not a whole-genus flammability claim.

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

Where rated spruces grow

Tagged as growing in 31 states.

Two sourced specimen panels compare the four-sided needles of Engelmann spruce with the flattened needles of subalpine fir. A schematic section shows why the spruce needle rolls between fingertips while the fir needle stays flat. — **FA Exhibit ID-003.** Spruce or fir: roll a needle. Morphology from USFS FEIS PICENG and ABILAS. Specimens after Sudworth 1908, figs. 29 and 38, public domain. Identification only — no flammability claim. Confirm uncertain material with a regional key or a botanist. CC BY 4.0.

See Picea on Grow → · JSON