Sources

Wikipedia

Reference text for each plant comes from its English Wikipedia article, linked on the plant page. Text from Wikipedia contributors, licensed under CC BY-SA 4.0. Articles retrieved September 2026.

USDA PLANTS Database

Latin names are checked against the PLANTS checklist, and each plant page links to its PLANTS profile where one exists. USDA fact sheets and plant guides are reference texts for the plants that have one, and some plants on this site were chosen from that collection. Public domain.

USDA, NRCS. 2026. The PLANTS Database (https://plants.usda.gov, 24 September 2026). National Plant Data Team, Greensboro, NC USA.

USDA Plant Hardiness Zone Map

Zones 1–13 follow the USDA system. Look up your zone. Public domain.

USDA Plant Hardiness Zone Map, 2023. Agricultural Research Service, U.S. Department of Agriculture.

Limits and safety

This is not a foraging or plant identification guide. Before eating any plant, confirm its identity, edibility and toxic parts with an authoritative source.
Planting calendars are estimates for a whole zone. Adjust for your local frost dates.
Plant Witch is not affiliated with or endorsed by the USDA or the Wikimedia Foundation.

Credits

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