PlantingWindowThe American Planting Almanac

When to plant mustard greens in Austin, Texas

February 10 – February 24

Direct-sow outdoors · typical Austin year

Climate basis: NOAA station Austin 6s, TX (USC00410431), 3 mi (5 km) from downtown Austin (ZCTA 78701 centroid), elevation 570 ft, on the 1991–2020 climate normals. Direct-sow mustard greens from approximately the dates above, anchored to the median last spring 32°F freeze (March 10). One year in ten still freezes after March 31.

Last spring freezeMarch 101-in-10 after Mar 31
First fall freezeNovember 171-in-10 before Nov 1
Frost-free season≈ 252 daysmedian at 32°F
Hard freeze, 28°Feb 28 – Dec 1kills even hardy greens
USDA zone9a20 to 25°F winter low — not frost timing

The Austin year

Direct-sow outdoorsFeb 10 – Feb 24
Fall plantingSep 22 – Oct 20
  • indoors under lights
  • in the garden
  • frost-free season
  • 1-in-10 years still freeze to Mar 31
Mustard greens in Austin · freeze context from Austin 6s, TX, 1991–2020 normals.

Every method, with its sources

Direct-sow outdoors

Feb 10 – Feb 24

Purdue lists mustard under both hardy (4–6 weeks before the last frost) and semi-hardy (2–4 weeks before); the later semi-hardy start is used. Anchored to the median last spring freeze (Mar 10). Purdue University Extension

Fall planting

Sep 22 – Oct 20

Purdue Table 2: plant fall mustard greens at least 4–8 weeks before the first fall frost. Anchored to the median first fall freeze (Nov 17). 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 (1)

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