When to plant Leeks in Berrien County, MI
Spring Leeks in Berrien County goes in April 15–May 6, once nighttime temps stop dipping near freezing. A second sowing from August 8 to August 22 extends the harvest into fall.
When to Plant Leeks in Berrien County, MI
Leeks are a mild, sweet allium that produces long white shanks. They are more refined than onions and are a key ingredient in soups, stews, and gratins.
Berrien County, Michigan is in USDA Zone 6b. The average last spring frost is April 29 and the first fall frost is October 17, giving you a growing season of approximately 171 days.
At an elevation of 733 feet, Berrien County receives approximately 33.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 89°F, providing good warmth for Leeks during the growing season.
Berrien County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Leeks Planting Timeline — Berrien County, MI
Leeks Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 25 | Mar 25 – Apr 8 |
| Transplant Outdoors | April 29 | Apr 29 – May 13 |
| Direct Sow | April 15 | Apr 15 – May 6 |
| Harvest | July 29 | Jul 29 – Oct 14 |
| Fall Sowing | August 8 | Aug 8 – Aug 22 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Transplant Outdoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Harvest |
| August | Fall Sowing Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
90–150 days
🧪 Soil pH
Needs 6–7 · Your soil: N/A
🗺️ USDA Zone
Zone 6b
📆 Growing Season
171 days in Berrien County
Growing Tips for Berrien County
Start seeds indoors 10-12 weeks before last frost. Transplant into trenches and hill soil around stems as they grow to increase the white portion. Harvest as needed.
Companion Planting
Good Companions
Avoid Planting Near
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Leeks in Other Locations
Frequently Asked Questions
When should I plant Leeks in Berrien County, MI?
Berrien County is in Zone 6b with an average last frost of April 29. Plan your Leeks planting based on this frost date — see the calendar above for exact timing.
What planting zone is Berrien County, MI?
Berrien County, Michigan is in USDA Hardiness Zone 6b. The average last spring frost is April 29 and first fall frost is October 17.
When should I plant Leeks in Berrien County, MI?
In Berrien County, MI, plant Leeks after the last frost (around April 29) and before the first frost (around October 17). Best results when soil holds above 50°F.
What growing zone is Berrien County, MI for Leeks?
Berrien County sits in USDA Zone 6b. Leeks grows reliably in zones 3a through 10b, so it's a good fit here.
Can Leeks grow in Berrien County's climate?
Yes — Leeks grows well in Berrien County's temperate climate. Berrien County averages a 171-day frost-free season, with last frost around April 29 and first frost around October 17.
Your Berrien County Garden Planner — Free
A 22-page printable planner built for Berrien County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.