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When to plant garlic in Duluth: 28 September – 10 November

In Duluth, garlic: plant from 28 September to about 10 November. For planting stock, the places nearby include Growing Duluth (garden centre, 7 km); addresses and opening hours are below.

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 Duluth: soil, season and weather

Garlic goes into the ground in Duluth from 28 September to about 10 November; the window opens a month before the first autumn frost. Nights then average below 0 °C in November–March; the coldest, January, averages -11.8 °C.

Planting28 September – 10 November
First autumn frost28 October
Coldest nightsJanuary, -11.8 °C
Soil back at 5 °C in spring26 April
Harvest (card)about 8 months after planting: June
Daylight11:54 on 28 September
Daylight at the winter solstice8:32

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

Garlic in Duluth: care after planting

Planted on 28 September: in the first weeks water every 7 days.

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

  • 28 September — feed: nitrogen
  • 26 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 Duluth, Fargo is 12 days earlier and Green Bay 2 days later.

CityDistanceDateDifference
Minneapolis219 km24 September – 10 November4 days earlier
Thunder Bay279 km23 September – 30 October5 days earlier
Fargo356 km16 September – 4 November12 days earlier
Grand Forks396 km16 September – 31 October12 days earlier
Green Bay405 km30 September – 17 November2 days later
Madison464 km27 September – 20 November1 day earlier

Where to buy garlic for planting in Duluth

Planting stock goes into the ground from 28 September to about 10 November; buy it before that. Within 15 km of Duluth OpenStreetMap lists 1 garden centre and 1 market (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant garlic in Duluth?

In Duluth, garlic: plant from 28 September to about 10 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 Duluth?

Last spring frost around 28 April, first autumn frost around 28 October.

Other crops in Duluth, with their dates