Garlic in Zone 3a & 3b
Allium sativum
When to plant garlic in zone 3b
Zones 3a and 3b share the same average frost dates in our data, so this page covers both.
Method: Direct sow: Direct-sow outside. Garlic doesn't transplant well, or doesn't need the extra time indoors.
| Start indoors | Not typically started indoors |
|---|---|
| Direct sow / transplant outside | Jan 10–Jan 17 |
| Estimated harvest | Sep 7–Sep 14 (~240 days after direct-sowing) |
Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 1-2 ft.
Garlic breaks the usual planting pattern entirely: it goes in the ground in fall, sits through winter, and isn't harvested until the following summer, around eight months later. It's the most patience-testing crop in a home garden, and also one of the most hands-off once it's in the ground.
How garlic fits zone 3's season
Zone 3b's frost-free window runs about 98 days, from May 30 to September 5. Garlic needs about 240 days from sowing to first harvest.
Good companions
- Tomato: Garlic's sulfur compounds may deter spider mites on tomatoes.
Where to buy garlic seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing garlic" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 3b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Garlic in USDA zone 3b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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