When to plant beets in Fargo, North Dakota

April 12 – April 26

Direct-sow outdoors · typical Fargo year

Climate basis: NOAA station Fargo Hector INTL AP, ND (USW00014914), 1 mi (2 km) from downtown Fargo (ZCTA 58102 centroid), elevation 900 ft, on the 1991–2020 climate normals. Direct-sow beets from approximately the dates above, anchored to the median last spring 32°F freeze (May 10). One year in ten still freezes after May 23.

Last spring freezeMay 101-in-10 after May 23

First fall freezeSeptember 301-in-10 before Sep 18

Frost-free season≈ 143 daysmedian at 32°F

Hard freeze, 28°Apr 30 – Oct 10kills even hardy greens

USDA zone4a-30 to -25°F winter low — not frost timing

The Fargo year

Direct-sow outdoorsApr 12 – Apr 26

Fall plantingAug 5 – Sep 2

indoors under lights
in the garden
frost-free season
1-in-10 years still freeze to May 23

Beets in Fargo · freeze context from Fargo Hector INTL AP, ND, 1991–2020 normals.

Every method, with its sources

Direct-sow outdoors

Apr 12 – Apr 26

Purdue: semi-hardy — 2–4 weeks before the last frost. Penn State sows from Apr 1 (−30) and UNH keys to 45°F soil; the later Purdue range is used. Anchored to the median last spring freeze (May 10). Purdue University Extension · Penn State Extension (York County Master Gardeners) · University of New Hampshire Extension

Fall planting

Aug 5 – Sep 2

Purdue Table 2: plant fall beets at least 4–8 weeks before the first fall frost, allowing for days to maturity. Anchored to the median first fall freeze (Sep 30). Purdue University Extension

Variety assumption: Assumes an average round variety (about 55–70 days; Penn State lists 70).

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 (3)

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.
Penn State Extension (York County Master Gardeners): Vegetable Seed Planting Guide (accessed 2026-07-24)
Earliest/latest sowing dates for a May 1 last-frost / Oct 1 first-frost baseline; offsets derived by date difference from May 1. Also days-to-maturity figures.
University of New Hampshire Extension: Growing Vegetables: When to Plant Your Vegetable Garden [fact sheet] (accessed 2026-07-24)
Per-crop 'time from seed to transplant' and 'safe to set out in garden' relative to last frost.

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