When to plant Leeks in Carpinteria, CA
The best window to plant Leeks in Carpinteria, is February 7–February 28, when soil warms to 50°F. Last frost typically hits February 28; first frost November 24. A second sowing from September 29 to October 13 extends the harvest into fall.
When to Plant Leeks in Carpinteria, 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.
Carpinteria, California is in USDA Zone 10a. The average last spring frost is February 28 and the first fall frost is November 24, giving you a growing season of approximately 269 days.
At an elevation of 2,364 feet, Santa Barbara County receives approximately 19.9 inches of rainfall annually with predominantly loam soil. Summer highs average 89°F, providing good warmth for Leeks during the growing season. With low rainfall, drip irrigation is essential for growing Leeks successfully. Mulch heavily to conserve soil moisture.
Carpinteria Soil Profile
Soil Type
Loam
Soil pH
6.5-7.2
Drainage
Well Drained
Monthly Watering Guide for Leeks
Leeks needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Leeks Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4" | 0" | ❄️ Dormant |
| Feb | 4.3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Mar | 4.3" | 2.9" | 1.4" | 💧 Light watering |
| Apr | 4.3" | 1.8" | 2.5" | 🚿 Regular watering |
| May | 4.3" | 0.5" | 3.8" | 🚿 Regular watering |
| Jun | 4.3" | 0.1" | 4.2" | 🚿 Regular watering |
| Jul | 4.3" | 0" | 4.3" | 🚿 Regular watering |
| Aug | 4.3" | 0" | 4.3" | 🚿 Regular watering |
| Sep | 4.3" | 0.2" | 4.1" | 🚿 Regular watering |
| Oct | 4.3" | 0.8" | 3.5" | 🚿 Regular watering |
| Nov | 4.3" | 2.1" | 2.2" | 🚿 Regular watering |
| Dec | — | 2.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Feb–Nov in Santa Barbara County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Leeks Planting Timeline — Carpinteria, CA
Leeks Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 31 | Jan 31 – Feb 14 |
| Transplant Outdoors | February 28 | Feb 28 – Mar 14 |
| Direct Sow | February 7 | Feb 7 – Feb 28 |
| Harvest | May 30 | May 30 – Aug 15 |
| Fall Sowing | September 29 | Sep 29 – Oct 13 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Start Indoors Transplant Outdoors Direct Sow |
| March | Transplant Outdoors |
| April | — |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | Harvest |
| September | Fall Sowing |
| 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 10a
📆 Growing Season
269 days in Santa Barbara County
Growing Tips for Carpinteria
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
When should I plant Leeks in Carpinteria, CA?
In Carpinteria, CA, plant Leeks after the last frost (around February 28) and before the first frost (around November 24). Best results when soil holds above 50°F.
What growing zone is Carpinteria, CA for Leeks?
Carpinteria sits in USDA Zone 10a. Leeks grows reliably in zones 3a through 10b, so it's a good fit here.
Can Leeks grow in Carpinteria's climate?
Yes — Leeks grows well in Carpinteria's temperate climate. Carpinteria averages a 270-day frost-free season, with last frost around February 28 and first frost around November 24.
Your Santa Barbara County Garden Planner — Free
A 22-page printable planner built for Santa Barbara County (Zone 10a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.