When to Plant Scallions in Minnesota (2026 Guide)
If you're eager to grow scallions in Minnesota, understanding the optimal planting times is crucial. In Zone 6a, the median last spring frost date is April 30, while in Zone 5b, it's May 4. Planning your planting accordingly will ensure your scallions thrive and yield a bountiful harvest throughout the growing season.
Scallions are a versatile crop that can be planted throughout the cooler months and are typically ready to harvest in about 60–70 days. These plants can be grown in successive batches every few weeks, allowing for a continuous supply from spring through fall. This planting strategy can help you get the most out of your garden space.
When considering fall, note that the median first frost date for Zone 6a is October 5, and for Zone 5b, it's September 29. Being aware of these dates can help you maximize your scallion production before the weather turns cold, especially in the unpredictable climate of Minnesota.
Planting Schedule by USDA Zone in Minnesota
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 6a | Start February 15 – March 1, ~6–8 weeks before April 30 | Transplant outdoors April 15 – May 1, after last frost | Direct sow outdoors April 15 – May 1, after last frost | Harvest from June 30 through late fall, before October 5 |
| Zone 5b | Start February 20 – March 5, ~6–8 weeks before May 4 | Transplant outdoors April 25 – May 5, after last frost | Direct sow outdoors April 25 – May 5, after last frost | Harvest from July 10 through early fall, before September 29 |
| Zone 5a | Start March 1 – March 15, ~6–8 weeks before May 17 | Transplant outdoors May 1 – May 15, after last frost | Direct sow outdoors May 1 – May 15, after last frost | Harvest from July 20 through early fall, before September 23 |
Scallions Planting Windows in Minnesota
- Indoor start: Start scallions indoors between February 15 and March 5 for the best results in Minnesota.
- Transplant outdoors: Transplant scallions outdoors from April 15 to May 15, depending on your hardiness zone.
- Harvest: Expect to harvest scallions from June 30 through early fall, potentially until before the first frost on October 5.
Common Mistakes Growing Scallions in Minnesota
- Many gardeners in Minnesota underestimate the impact of late spring snows, which can damage young scallion shoots. Starting seeds indoors or waiting for a stable warm period can help mitigate this risk.
- Overcrowding seedlings is a common error. When planting scallions, it’s essential to provide enough space for growth to avoid competition for nutrients and light. Thin plants as needed to ensure robust development.
- Another mistake is assuming that scallions can only be grown in rich soil. While they do prefer it, scallions are surprisingly hardy and can tolerate less-than-ideal soil conditions if properly cared for and watered.
- Ignoring weather variations is a frequent pitfall in Minnesota. The state can experience dramatic temperature fluctuations in spring, making it vital to monitor forecasts closely and adjust your planting schedule accordingly.
- Finally, many Minnesotans don't take full advantage of succession planting. By sowing scallions every few weeks, you can ensure a steady supply until the first frost, providing fresh greens throughout summer and into early fall.
Frequently Asked Questions
What if I'm in a cold pocket of Minnesota?
In a colder microclimate, consider starting your scallions indoors earlier and transplanting them out only after the danger of frost has passed, typically around late April or early May. Monitoring local conditions is essential.
Can I still plant scallions in May?
Yes, you can plant scallions in May, particularly in Zone 6a and 5b if frost has passed. Ensure the soil is warm enough for the seeds to germinate effectively and continue to sow every few weeks for a continuous supply.
How can I extend my scallion harvest into fall?
To prolong your scallion harvest, ensure to cover them with row covers when temperatures drop below 25°F in the late season. This helps resist light frosts, allowing for fresh scallions even in chilly conditions.
What soil conditions are best for scallions?
Scallions prefer well-drained, fertile soil enriched with organic matter. However, they can adapt to less-than-ideal conditions if kept well-watered, particularly during early growth stages when root systems are developing.
Can I regrow scallions from kitchen scraps?
Absolutely! After using scallions, save about 1-2 inches of the white base with roots, and place them in water or soil to grow new green tops. This easy process provides a fresh supply without the need for additional seeds.
Keep Learning
City guides in Minnesota
Other crops in Minnesota
Typical fall sowing window for Scallions in Minnesota: July 20 – August 10.