When to plant kohlrabi in Dallas, Texas

February 2 – February 16

Transplant outdoors · typical Dallas year

Climate basis: NOAA station Dallas Love Fld, TX (USW00013960), 5 mi (9 km) from downtown Dallas (ZCTA 75201 centroid), elevation 440 ft, on the 1991–2020 climate normals. Transplant kohlrabi outdoors from approximately the dates above, anchored to the median last spring 32°F freeze (March 2). One year in ten still freezes after March 19.

Last spring freezeMarch 21-in-10 after Mar 19

First fall freezeNovember 291-in-10 before Nov 10

Frost-free season≈ 272 daysmedian at 32°F

Hard freeze, 28°Feb 18 – Dec 12kills even hardy greens

USDA zone8b15 to 20°F winter low — not frost timing

The Dallas year

Start seeds indoorsDec 22 – Jan 5

Transplant outdoorsFeb 2 – Feb 16

Fall plantingOct 4 – Nov 1

indoors under lights
in the garden
frost-free season
1-in-10 years still freeze to Mar 19

Kohlrabi in Dallas · freeze context from Dallas Love Fld, TX, 1991–2020 normals.

Every method, with its sources

Start seeds indoors

Dec 22 – Jan 5

Sow 4–6 weeks before the set-out window opens (UNH: time from seed to transplant 4–6 weeks). Anchored to the median last spring freeze (Mar 2). University of New Hampshire Extension

Transplant outdoors

Feb 2 – Feb 16

UNH: safe to set out 4 weeks before the last frost; Purdue's hardy class allows 4–6 weeks before. The later UNH start is used. Anchored to the median last spring freeze (Mar 2). University of New Hampshire Extension · Purdue University Extension

Fall planting

Oct 4 – Nov 1

Purdue Table 2: plant fall kohlrabi at least 4–8 weeks before the first fall frost. Anchored to the median first fall freeze (Nov 29). Purdue University Extension

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)

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.
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.

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