When to Plant Garlic in Alaska
Plant in fall, harvest in summer. Garlic is one of the most rewarding crops for the patient gardener.
The Short Answer
Alaska Frost Dates
Your planting dates depend on which part of Alaska you're in. Here are the frost date ranges by region:
| Region | Zones | Last Frost (Spring) | First Frost (Fall) |
|---|---|---|---|
| Interior Alaska | 1a, 2a, 2b | May 15 - Jun 1 | Aug 20 - Sep 10 |
| Southcentral Alaska | 3b, 4a, 4b | May 1 - May 20 | Sep 10 - Sep 25 |
| Southeast Alaska | 5a, 5b, 6a | Apr 15 - May 5 | Sep 25 - Oct 15 |
Garlic Planting Schedule for Alaska
Interior Alaska (Zones 1a, 2a, 2b)
Average last frost: May 15 - Jun 1 · Average first frost: Aug 20 - Sep 10
Southcentral Alaska (Zones 3b, 4a, 4b)
Average last frost: May 1 - May 20 · Average first frost: Sep 10 - Sep 25
Southeast Alaska (Zones 5a, 5b, 6a)
Average last frost: Apr 15 - May 5 · Average first frost: Sep 25 - Oct 15
Growing Garlic in Alaska
Garlic in Alaska's Climate
Your cold winters are garlic's secret weapon. Hardneck varieties — the type with the best flavor and those coveted scapes — actually require prolonged cold (vernalization) to form proper bulbs. Plant cloves in October, 6 weeks before the ground freezes, and mulch heavily. The cloves root before winter, sleep under snow, and explode with growth in spring. Northern gardeners grow the best garlic in America because the cold is an asset, not a limitation.
Soil Considerations for Alaska
Varies widely. Interior has permafrost challenges. Raised beds essential for warming soil. Highly acidic soils common. Loose, well-drained soil is especially important for garlic since the edible portion grows underground. If your soil is heavy clay, consider raised beds.
Alaska Climate & Growing Season
Extreme daylight variation. Summer days of 18-24 hours of sunlight accelerate growth. Very short growing season in interior. Garlic can handle frost well, which is an advantage in Alaska's climate. You can push planting dates earlier in spring and extend into fall.
Growing season length varies across Alaska: Interior Alaska (1a, 2a, 2b) has a last frost around May 15 - Jun 1, while Southeast Alaska (5a, 5b, 6a) sees frost end around Apr 15 - May 5. This difference matters for garlic — adjust your planting dates to match your specific region.
Growing Tips
Plant individual cloves pointy-side up in fall, 4-6 weeks before ground freezes. Mulch heavily. Harvest when lower leaves brown.
Companion Planting
Plant garlic alongside these companions for better growth:
Keep garlic away from:
The Bottom Line
Last reviewed: March 29, 2026