When to plant Leeks in Prairie County, MT
Spring Leeks in Prairie County goes in May 4–May 25, once nighttime temps stop dipping near freezing. A second sowing from July 9 to July 23 extends the harvest into fall.
When to Plant Leeks in Prairie County, MT
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.
Prairie County, Montana is in USDA Zone 4a. The average last spring frost is May 11 and the first fall frost is October 1, giving you a growing season of approximately 143 days.
At an elevation of 6,830 feet, Prairie County receives approximately 22.2 inches of rainfall annually with predominantly loam soil. Summer highs average 81°F, so choose short-season varieties of Leeks to ensure they mature before fall.
Prairie County Soil Profile
Soil Type
Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Leeks Planting Timeline — Prairie County, MT
Leeks Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 30 | Mar 30 – Apr 13 |
| Transplant Outdoors | May 11 | May 11 – May 25 |
| Direct Sow | May 4 | May 4 – May 25 |
| Harvest | August 10 | Aug 10 – Oct 5 |
| Fall Sowing | July 9 | Jul 9 – Jul 23 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Fall Sowing |
| August | 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 4a
📆 Growing Season
143 days in Prairie County
Growing Tips for Prairie 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
Check more plant combinations with our Companion Planting Checker →
Leeks in Other Locations
Frequently Asked Questions
When should I plant Leeks in Prairie County, MT?
Prairie County is in Zone 4a with an average last frost of May 11. Plan your Leeks planting based on this frost date — see the calendar above for exact timing.
What planting zone is Prairie County, MT?
Prairie County, Montana is in USDA Hardiness Zone 4a. The average last spring frost is May 11 and first fall frost is October 1.
When should I plant Leeks in Prairie County, MT?
In Prairie County, MT, plant Leeks after the last frost (around May 11) and before the first frost (around October 1). Best results when soil holds above 50°F.
What growing zone is Prairie County, MT for Leeks?
Prairie County sits in USDA Zone 4a. Leeks grows reliably in zones 3a through 10b, so it's a good fit here.
Can Leeks grow in Prairie County's climate?
Yes — Leeks grows well in Prairie County's temperate climate. Prairie County averages a 143-day frost-free season, with last frost around May 11 and first frost around October 1.
Your Prairie County Garden Planner — Free
A 22-page printable planner built for Prairie County (Zone 4a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.