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When to plant garlic in Green Bay: 30 September – 17 November

In Green Bay, garlic: plant from 30 September to about 17 November.

Garlic is best planted early in the window: cloves planted late make smaller bulbs. Late planting works only while the soil is not frozen. Mulch after planting.

The date is about two weeks before the average daily temperature here falls below 0 °C (ten years of weather): an estimate, not the day the ground freezes, and a cold spell can freeze it earlier. Sources: UVM Extension, UNH Extension, RHS, how the ground freezes (NRC Canada, CBD-26).

Garlic in Green Bay: soil, season and weather

Garlic goes into the ground in Green Bay from 30 September to about 17 November; the window opens a month before the first autumn frost. Nights then average below 0 °C in November–March; the coldest, January, averages -9.8 °C.

Planting30 September – 17 November
First autumn frost30 October
Coldest nightsJanuary, -9.8 °C
Soil back at 5 °C in spring4 April
Harvest (card)about 8 months after planting: June
Daylight11:48 on 30 September
Daylight at the winter solstice8:49

The same dates in Green Bay hold for Tulip, Daffodil, Crocus and Hyacinth.

Garlic in Green Bay: care after planting

Planted on 30 September: in the first weeks water every 7 days.

Feeding, by the card’s schedule from that day:

  • 30 September — feed: nitrogen
  • 28 October — feed: nitrogen

Pests and diseases of garlic to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Garlic in nearby cities

Around Green Bay, Madison is 3 days earlier and Traverse City 10 days later.

CityDistanceDateDifference
Milwaukee165 km2 October – 25 November2 days later
Traverse City192 km10 October – 26 November10 days later
Madison196 km27 September – 20 November3 days earlier
Grand Rapids256 km4 October – 29 November4 days later
Rockford265 km28 September – 25 November2 days earlier
Chicago295 km7 October – 3 December7 days later

Where to buy garlic for planting in Green Bay

Planting stock goes into the ground from 30 September to about 17 November; buy it before that. Within 15 km of Green Bay OpenStreetMap lists 6 garden centres, 1 plant nursery and 2 markets (collected 20 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant garlic in Green Bay?

In Green Bay, garlic: plant from 30 September to about 17 November. Garlic is best planted early in the window: cloves planted late make smaller bulbs. Late planting works only while the soil is not frozen. Mulch after planting.

When is the last spring frost in Green Bay?

Last spring frost around 29 April, first autumn frost around 30 October.

Other crops in Green Bay, with their dates