When to plant Leeks in Gunnison County, CO
Gunnison County's spring Leeks window runs May 29 through June 19. time plantings around the expected last-frost window for best survival. A second sowing from July 2 to July 16 extends the harvest into fall.
When to Plant Leeks in Gunnison County, CO
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.
Gunnison County, Colorado is in USDA Zone 5a. The average last spring frost is June 12 and the first fall frost is September 10, giving you a growing season of approximately 90 days.
At an elevation of 7,435 feet, Gunnison County receives approximately 17.9 inches of rainfall annually with predominantly loam soil. Summer highs average 83°F, so choose short-season varieties of Leeks to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Leeks successfully. Mulch heavily to conserve soil moisture.
Gunnison County Soil Profile
Soil Type
Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Leeks Planting Timeline — Gunnison County, CO
Leeks Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | May 8 | May 8 – May 22 |
| Transplant Outdoors | June 12 | Jun 12 – Jun 26 |
| Direct Sow | May 29 | May 29 – Jun 19 |
| Harvest | September 11 | Sep 11 – Nov 27 |
| Fall Sowing | July 2 | Jul 2 – Jul 16 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Start Indoors Direct Sow |
| June | Transplant Outdoors Direct Sow |
| July | Fall Sowing |
| August | — |
| September | Harvest |
| October | Harvest |
| November | Harvest |
| 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 5a
📆 Growing Season
90 days in Gunnison County
Growing Tips for Gunnison 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 Gunnison County, CO?
Gunnison County is in Zone 5a with an average last frost of June 12. Plan your Leeks planting based on this frost date — see the calendar above for exact timing.
What planting zone is Gunnison County, CO?
Gunnison County, Colorado is in USDA Hardiness Zone 5a. The average last spring frost is June 12 and first fall frost is September 10.
When should I plant Leeks in Gunnison County, CO?
In Gunnison County, CO, plant Leeks after the last frost (around June 12) and before the first frost (around September 10). Best results when soil holds above 50°F.
What growing zone is Gunnison County, CO for Leeks?
Gunnison County sits in USDA Zone 5a. Leeks grows reliably in zones 3a through 10b, so it's a good fit here.
Can Leeks grow in Gunnison County's climate?
Yes — Leeks grows well in Gunnison County's temperate climate. Gunnison County averages a 90-day frost-free season, with last frost around June 12 and first frost around September 10.
Your Gunnison County Garden Planner — Free
A 22-page printable planner built for Gunnison County (Zone 5a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.