Explore LibraryStart free trial
← Plant Library

When to Plant Garlic in Idaho

Idaho spans USDA hardiness 4a to 7b (zones 4a to 7b on this page). Plant garlic by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.

Jump to: Zone 4a · Zone 4b · Zone 5a · Zone 5b · Zone 6a · Zone 6b · Zone 7a · Zone 7b

Garlic planting calendar for Idaho, Zone 4a

Average last spring frost

May 15

Average first fall frost

September 20

🌿

Direct sow

Nov 14

🌾

Projected first harvest

Jul 12

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 4a (approximate)

Most garlic mature in about 240 days. Full zone 4 guide (both 4a and 4b) →

Garlic planting calendar for Idaho, Zone 4b

Average last spring frost

May 10

Average first fall frost

September 25

🌿

Direct sow

Nov 9

🌾

Projected first harvest

Jul 7

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 4b (approximate)

Most garlic mature in about 240 days. Full zone 4 guide (both 4a and 4b) →

Garlic planting calendar for Idaho, Zone 5a

Average last spring frost

May 5

Average first fall frost

October 1

🌿

Direct sow

Nov 4

🌾

Projected first harvest

Jul 2

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 5a (approximate)

Most garlic mature in about 240 days. Full zone 5 guide (both 5a and 5b) →

Garlic planting calendar for Idaho, Zone 5b

Average last spring frost

April 30

Average first fall frost

October 5

🌿

Direct sow

Oct 30

🌾

Projected first harvest

Jun 27

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 5b (approximate)

Most garlic mature in about 240 days. Full zone 5 guide (both 5a and 5b) →

Garlic planting calendar for Idaho, Zone 6a

Average last spring frost

April 25

Average first fall frost

October 10

🌿

Direct sow

Oct 25

🌾

Projected first harvest

Jun 22

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 6a (approximate)

Most garlic mature in about 240 days. Full zone 6 guide (both 6a and 6b) →

Garlic planting calendar for Idaho, Zone 6b

Average last spring frost

April 20

Average first fall frost

October 15

🌿

Direct sow

Oct 20

🌾

Projected first harvest

Jun 17

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 6b (approximate)

Most garlic mature in about 240 days. Full zone 6 guide (both 6a and 6b) →

Garlic planting calendar for Idaho, Zone 7a

Average last spring frost

April 15

Average first fall frost

October 20

🌿

Direct sow

Oct 15

🌾

Projected first harvest

Jun 12

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 7a (approximate)

Most garlic mature in about 240 days. Full zone 7 guide (both 7a and 7b) →

Garlic planting calendar for Idaho, Zone 7b

Average last spring frost

April 10

Average first fall frost

October 30

🌿

Direct sow

Oct 10

🌾

Projected first harvest

Jun 7

J
F
M
A
M
J
J
A
S
O
N
D
🌱 Start indoors🌿 Growing outside🌾 HarvestTodayZone 7b (approximate)

Most garlic mature in about 240 days. Full zone 7 guide (both 7a and 7b) →

Not sure which half-zone you're in? Set your ZIP in HomeSown for dates tuned to your exact location.

Varieties to grow

6 varieties of garlic in the HomeSown library. Tap any for its full grow guide.

German Extra Hardy Garlic →Inchelium Red Garlic →Killarney Red Garlic →Music Hardneck Garlic →Softneck Garlic →Spanish Roja Garlic →

Common problems with garlic

What to watch for, with identification and treatment for each

Leek MothOnion MaggotBulb MiteGroundhogsAntsAphidsPink RootBotrytis Neck RotFusarium Basal RotWhite RotBulb RotBolting

🌱 Grow garlic with a calendar built for your exact yard

HomeSown turns your ZIP code into a personalized planting calendar, watering reminders, and pest help. Free to start.

Start your free garden →

garlic — full zone guide

All zonesZone 4 →Zone 5 →Zone 6 →Zone 7 →