When to plant chives in Burlington, Vermont

April 29 – May 13

Transplant 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. Transplant chives outdoors 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 season169 daysmedian at 32°F
Hard freeze, 28°Apr 18Oct 28kills even hardy greens
USDA zone5b-15 to -10°F winter low not frost timing

The Burlington year

Start seeds indoorsMar 4 – Mar 18
Transplant outdoorsApr 29 – May 13
  • indoors under lights
  • in the garden
  • frost-free season
  • 1-in-10 years still freeze to May 11
Chives in Burlington · freeze context from Burlington INTL AP, VT, 1991–2020 normals.

Every method, with its sources

Start seeds indoors

Mar 4 – Mar 18

Wisconsin Horticulture starts chive seed indoors before the last frost date for planting out after frost danger, but says only 'a few weeks'; USU Extension fixes the lead time at 6 to 8 weeks of growth before garden planting, so sowing runs 8 to 6 weeks before the last spring freeze. Anchored to the median last spring freeze (Apr 29). University of Minnesota Extension · University of Wisconsin-Madison Division of Extension, Wisconsin Horticulture · Utah State University Extension

Transplant outdoors

Apr 29 – May 13

UMN Extension says the easiest and most successful way to grow chives is planting rooted clumps in spring after frost danger has passed, and Wisconsin Horticulture likewise puts indoor-started plants out after the danger of frost is past; both agree, so the window opens at the last spring freeze. Anchored to the median last spring freeze (Apr 29). University of Minnesota Extension · University of Wisconsin-Madison Division of Extension, Wisconsin Horticulture · Utah State University Extension

Variety assumption: Wisconsin Horticulture warns that direct-seeded chives give little or no harvest the first year, so rooted clumps or indoor-started transplants are the practical route.

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)

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