When to Plant Garlic in Minnesota (2026 Guide)
Garlic is a fantastic crop for gardeners in Minnesota, offering a rewarding harvest with minimal care. Unlike many vegetables that thrive in the warmer months, garlic is planted in the fall, allowing it to establish roots and grow slowly through the winter. This unique planting time takes advantage of the seasonality of gardening, following the clear marker of summer crop harvests, making it an excellent choice for maximizing your garden’s productivity.
In the northern climate of Minnesota, it is essential to be aware of the local frost dates when planning your garlic planting. For those in Zone 6a, the median last spring frost is around April 30, allowing a suitable window for planting in the fall. Meanwhile, gardeners in Zone 5b must wait until May 4 for the last frost before they can begin to prepare their soil for planting garlic.
Garlic thrives best in well-drained soil, and selecting the right time to plant in Minnesota can lead to successful growth and an abundant harvest. The garlic grown here typically matures over the course of the summer, ready for harvest around June to August. With its robust flavor and impressive storage capabilities, garlic will be a highlight of your homegrown garden.
Planting Schedule by USDA Zone in Minnesota
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 6a | N/A | Start September 1 – September 15, 2025 | N/A | Harvest June 15 – July 15, 2026 |
| Zone 5b | N/A | Start September 10 – September 20, 2025 | N/A | Harvest June 20 – July 20, 2026 |
| Zone 5a | N/A | Start September 15 – September 25, 2025 | N/A | Harvest June 30 – July 30, 2026 |
Garlic Planting Windows in Minnesota
- Indoor start: N/A
- Transplant outdoors: Transplant garlic outdoors between September 1 and September 25, 2025, depending on your USDA hardiness zone.
- Harvest: Garlic is typically ready for harvest from June 15 to July 30, 2026, with timing varying by specific zone.
Common Mistakes Growing Garlic in Minnesota
- One common mistake for Minnesota gardeners is planting garlic too late in the fall. Garlic needs time to establish roots before the ground freezes. If you miss the planting window in your zone, you may end up with poor yields the following year.
- Another mistake is failing to account for Minnesota's variable climate. Late spring snows can damage tender garlic shoots if they sprout too early. Gardeners should monitor weather forecasts closely and be prepared to protect plants during unexpected cold snaps.
- Poor soil drainage is a frequent issue in many Minnesota gardens, particularly in clay-heavy areas. Garlic bulbs require well-draining soil to prevent rot. Consider amending the soil with organic matter to improve drainage before planting.
- Some gardeners in Minnesota underestimate the benefits of mulch. Proper mulching helps keep the soil temperature stable and retains moisture, both of which are critical during the harsh winter months and for early growth in spring.
- Lastly, not harvesting garlic at the right time can lead to diminished quality. Waiting too long may cause the bulbs to decay or split, which will significantly reduce their storage life, especially in Minnesota’s humid climate during summer.
Frequently Asked Questions
What if I'm in a cold pocket of Minnesota?
If you're in a colder area, consider planting garlic a bit earlier in the fall to give it the best chance to establish roots before winter. Mulching can also help retain warmth and protect the bulbs from severe frost.
Can I still plant garlic in May?
Planting in May is not recommended for garlic in Minnesota because it may not establish well before the summer heat. Successful crops need to be planted in the fall to take advantage of the cold period required for proper bulb development.
When should I remove garlic scapes?
Garlic scapes can be harvested in June when they start to curl. Removing them helps redirect the plant's energy back to bulb production. This can significantly increase the size of the mature garlic bulbs come harvest time.
How can I tell when my garlic is ready to harvest?
Garlic is generally ready for harvest when 60-70% of the lower leaves have turned yellow and died back. This usually occurs between mid-June to late July, depending on your growing zone and conditions.
What type of garlic is best for Minnesota?
Hardneck garlic varieties typically perform better in Minnesota’s colder climates compared to softneck varieties. They are more winter-hardy and develop larger cloves, making them an ideal choice for local growers.
Keep Learning
City guides in Minnesota
Other crops in Minnesota
Typical fall sowing window for Garlic in Minnesota: October 2 – October 23.