When to plant garlic in Boise: 27 September – end of December

In Boise, garlic: plant from 27 September to the end of December. For planting stock, the places nearby include Zamzows (garden centre, 5 km) and Zamzows (farm supply, 8 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 average daily temperature here stays above 0 °C all winter, and at least two months average 10 °C or less: the cold garlic needs, one to two months at 0–10 °C (RHS). The two-month threshold is our rule of thumb. Sources: UVM Extension, UNH Extension, RHS.

Garlic in Boise: soil, season and weather

Garlic goes into the ground in Boise from 27 September to the end of December; the window opens a month before the first autumn frost. Nights then average below 0 °C in December–February; the coldest, January, averages -3.7 °C.

Planting	27 September – end of December
First autumn frost	27 October
Coldest nights	January, -3.7 °C
Soil back at 5 °C in spring	6 March
Harvest (card)	about 8 months after planting: June
Daylight	11:58 on 27 September
Daylight at the winter solstice	8:56

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

Garlic in Boise: care after planting

Planted on 27 September: in the first weeks water every 7 days.

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

27 September — feed: nitrogen
25 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

All the nearest cities on our list plant garlic earlier than Boise; the closest date is in Salt Lake City, 1 day earlier.

City	Distance	Date	Difference
Elko	310 km	13 September – 15 November	14 days earlier
Idaho Falls	336 km	14 September – 14 November	13 days earlier
Missoula	400 km	6 September – 12 November	21 days earlier
Spokane	460 km	15 September – 23 November	12 days earlier
Helena	466 km	3 September – 5 November	24 days earlier
Salt Lake City	476 km	26 September – 23 December	1 day earlier

Where to buy garlic for planting in Boise

Planting stock goes into the ground from 27 September to the end of December; buy it before that. Within 15 km of Boise OpenStreetMap lists 4 garden centres, 2 farm-supply shops and 1 plant nursery (collected 20 October 2026).

Zamzows — farm supply
East Overland Road 3650, 83642 Meridian · 12 km
Zamzows — farm supply
West State Street 6208, 83703 Boise · 8 km
Madeline George Garden Design & Nursery — plant nursery
West Hill Road Parkway 10550, 83714 Boise · 13 km · madelinegeorge.com
Zamzows — garden centre
South Federal Way 3691, 83716 Boise · Mon–Fri 09:00–19:00; Sun 22:00–17:00; Sat 09:00–18:00 · 5 km

Questions