PlantingWindowThe American Planting Almanac

When to plant mustard greens in Burlington, Vermont

April 1 – April 15

Direct-sow outdoors · typical Burlington year

Climate basis: NOAA station Burlington INTL AP, VT (USW00014742), 3 mi (5 km) from downtown Burlington (ZCTA 05401 centroid), elevation 330 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 (April 29). One year in ten still freezes after May 11.

Last spring freezeApril 291-in-10 after May 11
First fall freezeOctober 151-in-10 before Oct 2
Frost-free season≈ 169 daysmedian at 32°F
Hard freeze, 28°Apr 18 – Oct 28kills even hardy greens
USDA zone5b-15 to -10°F winter low — not frost timing

The Burlington year

Direct-sow outdoorsApr 1 – Apr 15
Fall plantingAug 20 – Sep 17
  • indoors under lights
  • in the garden
  • frost-free season
  • 1-in-10 years still freeze to May 11
Mustard greens in Burlington · freeze context from Burlington INTL AP, VT, 1991–2020 normals.

Every method, with its sources

Direct-sow outdoors

Apr 1 – Apr 15

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 (Apr 29). Purdue University Extension

Fall planting

Aug 20 – Sep 17

Purdue Table 2: plant fall mustard greens at least 4–8 weeks before the first fall frost. Anchored to the median first fall freeze (Oct 15). 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)

Keep exploring

This crop, other cities
Related crops in Burlington
Local overview