When to plant potatoes in Sacramento, California

December 1 – December 15

Direct-sow outdoors · typical Sacramento year

Climate basis: NOAA station Sacramento 5 Ese, CA (USW00023271), 5 mi (7 km) from downtown Sacramento (ZCTA 95814 centroid), elevation 38 ft, on the 1991–2020 climate normals. Plant seed potatoes from approximately the dates above, anchored to the median last spring 32°F freeze (January 12). One year in ten still freezes after February 8.

Last spring freezeJanuary 121-in-10 after Feb 8

First fall freezeDecember 161-in-10 before Nov 28

Frost-free season≈ 341 daysmedian at 32°F

USDA zone9b25 to 30°F winter low — not frost timing

The Sacramento year

Direct-sow outdoorsDec 1 – Dec 15

indoors under lights
in the garden
frost-free season
1-in-10 years still freeze to Feb 8

Potatoes in Sacramento · freeze context from Sacramento 5 Ese, CA, 1991–2020 normals.

Every method, with its sources

Direct-sow outdoors

Dec 1 – Dec 15

Purdue: hardy — plant seed pieces 4–6 weeks before the last spring frost. Minnesota adds the practical caveat: plant as soon as the soil warms. Anchored to the median last spring freeze (Jan 12). Purdue University Extension · University of Minnesota Extension

Start seeds indoors

Not calculated

Potatoes are grown from seed pieces, not indoor-started seedlings.

Transplant outdoors

Not calculated

The cited extension guides do not time an outdoor transplanting window for this crop.

Fall planting

Not calculated

No source-backed fall planting rule exists for this crop in the registry, so no fall window is calculated.

Variety assumption: Assumes a mid-season variety (about 90–110 days from planting).

These windows describe typical years (1991–2020 climate normals), not this year's forecast. Freezes happen outside them — especially in frost pockets, valleys, and urban edges. Watch the forecast before committing tender plants.

This week, not a typical year:

Crop rule sources (2)

Purdue University Extension: Indiana Vegetable Planting Calendar (HO-186-W) (accessed 2026-07-24)
Hardiness classes: hardy = plant 4-6 wk before last spring frost; semi-hardy = 2-4 wk before; tender = after average last frost; very tender = at least 2 wk after. Table 2: fall planting at least 4-8 wk before first fall frost.
University of Minnesota Extension: Growing potatoes (accessed 2026-07-24)
"Plant seed pieces as soon as the soil warms" — soil-temperature caveat to the frost-relative rule.

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