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When to plant artichoke in Zone 4b
In Zone 4b, start indoors around February 15 – March 15 and transplant around May 3 – May 17.
Your artichoke timeline — Zone 4b
| Start indoors | February 15 – March 15 |
|---|---|
| Transplant | May 3 – May 17 |
| Zone 4b last frost | ~05/10 |
| Zone 4b first frost | ~09/30 |
Start indoors; set out on the frost-free date (the average last frost). [src]Cited: Johnny's Selected Seeds — Seed-Starting Date Calculator chart
Dates computed from Zone 4b's median NOAA frost normals and the cited rule. Your town may differ by a week or two — check your exact ZIP.
What you'll need
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Last verified 2026-07-17. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rule: Johnny's Selected Seeds — Seed-Starting Date Calculator chart.