When to plant Black Beans in Marshall County, MN
Plant Black Beans in Marshall County, between May 25 and June 15 — the only viable window. Zone 3b's short season (144 frost-free days) rules out a fall crop.
When to Plant Black Beans in Marshall County, MN
Black beans are a warm-season legume producing small, dark, protein-rich beans that are a staple in Latin American and Caribbean cuisines.
Marshall County, Minnesota is in USDA Zone 3b. The average last spring frost is May 11 and the first fall frost is October 2, giving you a growing season of approximately 144 days.
At an elevation of 1,303 feet, Marshall County receives approximately 33.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 81°F, so choose short-season varieties of Black Beans to ensure they mature before fall.
Marshall County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Black Beans Planting Timeline — Marshall County, MN
Black Beans Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | May 25 | May 25 – Jun 15 |
| Harvest | August 24 | Aug 24 – Sep 28 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Direct Sow |
| June | Direct Sow |
| July | — |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
90–120 days
🧪 Soil pH
Needs 6–7.5 · Your soil: N/A
🗺️ USDA Zone
Zone 3b
📆 Growing Season
144 days in Marshall County
Growing Tips for Marshall County
Direct sow after last frost. Provide support for climbing varieties. Allow pods to dry fully on the vine before harvesting. Thresh dried pods by hand or in a pillowcase.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Black Beans in Other Locations
Frequently Asked Questions
When should I plant Black Beans in Marshall County, MN?
Marshall County is in Zone 3b with an average last frost of May 11. Plan your Black Beans planting based on this frost date — see the calendar above for exact timing.
What planting zone is Marshall County, MN?
Marshall County, Minnesota is in USDA Hardiness Zone 3b. The average last spring frost is May 11 and first fall frost is October 2.
When should I plant Black Beans in Marshall County, MN?
In Marshall County, MN, plant Black Beans after the last frost (around May 11) and before the first frost (around October 2). Best results when soil holds above 50°F.
What growing zone is Marshall County, MN for Black Beans?
Marshall County sits in USDA Zone 3b. Black Beans grows reliably in zones 3a through 11b, so it's a good fit here.
Can Black Beans grow in Marshall County's climate?
Yes — Black Beans grows well in Marshall County's temperate climate. Marshall County averages a 144-day frost-free season, with last frost around May 11 and first frost around October 2.
Your Marshall County Garden Planner — Free
A 22-page printable planner built for Marshall County (Zone 3b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.