Sunchoke (Jerusalem Artichoke) in Zone 3a & 3b
Helianthus tuberosus
When to plant sunchoke (jerusalem artichoke) in zone 3b
Zones 3a and 3b share the same average frost dates in our data, so this page covers both.
Method: Direct sow: Direct-sow outside. Sunchoke (Jerusalem Artichoke) doesn't transplant well, or doesn't need the extra time indoors.
| Start indoors | Not typically started indoors |
|---|---|
| Direct sow / transplant outside | May 16–May 23 |
| Estimated harvest | May 15 '28–May 22 '28 (First real harvest the season after planting) |
Spacing: about 4 square feet per plant (square-foot-gardening spacing). Mature height: 6-10 ft.
Sunchokes, also called Jerusalem artichokes despite having no connection to Jerusalem or to the globe artichoke, are a perennial sunflower relative grown for their knobby, nutty-flavored tubers rather than their flowers.
How sunchoke (jerusalem artichoke) fits zone 3's season
Zone 3b's frost-free window runs about 98 days, from May 30 to September 5. Sunchoke (Jerusalem Artichoke) takes about 1 growing season to reach first worthwhile harvest, so what matters here is how many of these seasons it gets, not whether one is long enough.
Sunchoke (Jerusalem Artichoke) is hardy in zones 3-9, so in zone 3b it stays in the ground through winter and comes back rather than being replanted. Allow about 5 ft of spread at maturity.
Good companions
No standout companions recorded yet for Sunchoke (Jerusalem Artichoke).
Where to buy sunchoke seeds
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See it growing
Search YouTube for "growing sunchoke (jerusalem artichoke)" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 3b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Sunchoke (Jerusalem Artichoke) in USDA zone 3b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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