When to plant Corn in Carpinteria, CA
Aim to plant Corn in Carpinteria on or after March 7; the window stays open through March 28. Carpinteria's 270-day frost-free season gives you plenty of room for a spring and fall cycle.
When to Plant Corn in Carpinteria, CA
Santa Barbara County, California gardeners: here's your June plan
Welcome to June in Zone 10a. These are the moves that will have the biggest impact on your growing season.
-
Collect corn at their peak
Check every 1–2 days. Many of these get tough or go to seed if you wait too long.
Before July arrives, get these ready
- First harvests: corn
Corn is a warm-season grass grown for its sweet ears, which are best eaten soon after harvest. It is wind-pollinated and must be planted in blocks for good kernel fill.
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 Corn during the growing season. With low rainfall, drip irrigation is essential for growing Corn successfully. Mulch heavily to conserve soil moisture.
Carpinteria Soil Profile
Soil Type
Loam
Soil pH
6.5-7.2
Drainage
Well Drained
Corn Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Soil Compatibility in Carpinteria
How your county's soil matches Corn's growing requirements.
Soil pH
Your soil pH (6.5–7.2) overlaps with Corn's range (6.0–7.0), though not a perfect match.
Soil Texture
The loam soil in Santa Barbara County is excellent for Corn — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.8%). Annual compost additions will help Corn.
How to Plant Corn
Succession Planting Corn
Sow every 6.9 weeks. Last sowing by Aug 16 to harvest before frost.
Corn Water Budget
Water stress score is 10/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Corn
Corn needs approximately 1.5 inches of water per week (6.5" per month). Here's how your county's rainfall compares month by month.
| Month | Corn Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4" | 0" | ❄️ Dormant |
| Feb | 6.5" | 4.6" | 1.9" | 💧 Light watering |
| Mar | 6.5" | 2.9" | 3.6" | 🚿 Regular watering |
| Apr | 6.5" | 1.8" | 4.7" | 🚿 Regular watering |
| May | 6.5" | 0.5" | 6" | 🚿 Regular watering |
| Jun | 6.5" | 0.1" | 6.4" | 🚿 Regular watering |
| Jul | 6.5" | 0" | 6.5" | 🚿 Regular watering |
| Aug | 6.5" | 0" | 6.5" | 🚿 Regular watering |
| Sep | 6.5" | 0.2" | 6.3" | 🚿 Regular watering |
| Oct | 6.5" | 0.8" | 5.7" | 🚿 Regular watering |
| Nov | 6.5" | 2.1" | 4.4" | 🚿 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.
Corn Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Corn Planting Timeline — Carpinteria, CA
Corn Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | March 7 | Mar 7 – Mar 28 |
| Harvest | May 9 | May 9 – Jul 4 |
Plant 1" deep · 12" apart · Rows 36" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Direct Sow |
| April | — |
| May | Harvest |
| June | Harvest |
| July | Harvest |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.5"/week · 2-3 times/week
📅 Days to Maturity
60–100 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 10a
📆 Growing Season
269 days in Santa Barbara County
Growing Tips for Corn in Carpinteria
Direct sow Corn outdoors after February 28 in Santa Barbara County when soil has warmed and frost danger has passed.
Common pests for Corn in this region include corn earworm and corn borers. Use row covers early in the season and inspect plants weekly.
Santa Barbara County receives only 20" of rain annually. Corn needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
General growing tips
Plant in blocks of at least 4 rows rather than single rows for proper pollination. Direct sow after soil reaches 60F. Side-dress with nitrogen when plants are knee-high.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Corn in Other Locations
When should I plant Corn in Carpinteria, CA?
In Carpinteria, CA, plant Corn 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 Corn?
Carpinteria sits in USDA Zone 10a. Corn grows reliably in zones 3a through 11b, so it's a good fit here.
Can Corn grow in Carpinteria's climate?
Yes — Corn 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.