When to plant Leeks in Yolo County, CA
In Zone 9b (Yolo County), direct-sow Leeks between January 19 and February 9 for spring, after the February 9 last-frost mark. A second sowing from October 8 to October 22 extends the harvest into fall.
When to Plant Leeks in Yolo County, CA
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.
Yolo County, California is in USDA Zone 9b. The average last spring frost is February 9 and the first fall frost is December 3, giving you a growing season of approximately 297 days.
At an elevation of 163 feet, Yolo County receives approximately 27.7 inches of rainfall annually with predominantly loam soil. Summer highs average 95°F, so Leeks may need afternoon shade and extra watering during peak heat.
Yolo County Soil Profile
Soil Type
Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Leeks Planting Timeline — Yolo County, CA
Leeks Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 12 | Jan 12 – Jan 26 |
| Transplant Outdoors | February 9 | Feb 9 – Feb 23 |
| Direct Sow | January 19 | Jan 19 – Feb 9 |
| Harvest | May 11 | May 11 – Jul 27 |
| Fall Sowing | October 8 | Oct 8 – Oct 22 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors Direct Sow |
| February | Transplant Outdoors Direct Sow |
| March | — |
| April | — |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | — |
| September | — |
| October | Fall Sowing |
| 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 9b
📆 Growing Season
297 days in Yolo County
Growing Tips for Yolo 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
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Leeks in Other Locations
Frequently Asked Questions
When should I plant Leeks in Yolo County, CA?
Yolo County is in Zone 9b with an average last frost of February 9. Plan your Leeks planting based on this frost date — see the calendar above for exact timing.
What planting zone is Yolo County, CA?
Yolo County, California is in USDA Hardiness Zone 9b. The average last spring frost is February 9 and first fall frost is December 3.
When should I plant Leeks in Yolo County, CA?
In Yolo County, CA, plant Leeks after the last frost (around February 9) and before the first frost (around December 3). Best results when soil holds above 50°F.
What growing zone is Yolo County, CA for Leeks?
Yolo County sits in USDA Zone 9b. Leeks grows reliably in zones 3a through 10b, so it's a good fit here.
Can Leeks grow in Yolo County's climate?
Yes — Leeks grows well in Yolo County's temperate climate. Yolo County averages a 298-day frost-free season, with last frost around February 9 and first frost around December 3.
Your Yolo County Garden Planner — Free
A 22-page printable planner built for Yolo County (Zone 9b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.