When to Plant Fava Beans in Lake County, CA
Fava beans are a cool-season legume with large, meaty beans inside thick pods. They fix nitrogen in the soil and are one of the oldest cultivated crops.
Lake County, California is in USDA Zone 8b. The average last spring frost is March 2 and the first fall frost is November 27, giving you a growing season of approximately 270 days.
At an elevation of 154 feet, Lake County receives approximately 30.4 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 83°F, so choose short-season varieties of Fava Beans to ensure they mature before fall. Sandy soil warms quickly in spring — great for early planting — but Fava Beans will need more frequent watering and organic matter to retain nutrients.
Lake County Soil Profile
Soil Type
Sandy Loam
Soil pH
6.1-6.9
Drainage
Well Drained
Plant 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 Lake County
How your county's soil matches Fava Beans's growing requirements.
Soil pH
Your soil pH (6.1–6.9) is within Fava Beans's preferred range (6.0–7.0).
Soil Texture
Sandy soil in Lake County warms quickly in spring but drains fast. Fava Beans will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is moderate (2.7%). Annual compost additions will help Fava Beans.
How to Plant Fava Beans
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Fava Beans
Sow every 8.6 weeks. Last sowing by Aug 19 to harvest before frost.
For a dedicated fall crop, sow by Sep 18.
Plant Water Budget
Monthly Watering Guide for Fava Beans
Fava Beans needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Fava Beans Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 6.2" | 0" | ❄️ Dormant |
| Feb | — | 6.5" | 0" | ❄️ Dormant |
| Mar | 4.3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Apr | 4.3" | 2.7" | 1.6" | 💧 Light watering |
| May | 4.3" | 0.8" | 3.5" | 🚿 Regular watering |
| Jun | 4.3" | 0.2" | 4.1" | 🚿 Regular watering |
| Jul | 4.3" | 0" | 4.3" | 🚿 Regular watering |
| Aug | 4.3" | 0" | 4.3" | 🚿 Regular watering |
| Sep | 4.3" | 0.3" | 4" | 🚿 Regular watering |
| Oct | 4.3" | 1.1" | 3.2" | 🚿 Regular watering |
| Nov | 4.3" | 3" | 1.3" | 💧 Light watering |
| Dec | — | 5.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Lake County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Fava Beans 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.
Fava Beans Planting Timeline — Lake County, CA
Fava Beans Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 26 | Jan 26 – Feb 9 |
| Transplant Outdoors | March 2 | Mar 2 – Mar 16 |
| Direct Sow | February 16 | Feb 16 – Mar 9 |
| Harvest | May 18 | May 18 – Jun 29 |
| Fall Sowing | September 18 | Sep 18 – Oct 2 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Start Indoors Direct Sow |
| March | Transplant Outdoors Direct Sow |
| April | — |
| May | Harvest |
| June | Harvest |
| July | — |
| August | — |
| September | Fall Sowing |
| October | Fall Sowing |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · 1-2 times/week
📅 Days to Maturity
75–100 days
🧪 Soil pH
Needs 6–7 · Your soil: ideal
🗺️ USDA Zone
Zone 8b
📆 Growing Season
270 days in Lake County
Growing Tips for Fava Beans in Lake County
Direct sow Fava Beans outdoors after March 02 in Lake County when soil has warmed and frost danger has passed.
Sandy soil in Lake County dries quickly — mulch Fava Beans with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Common pests for Fava Beans in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow as early as soil can be worked in spring. Pinch growing tips when pods begin to form to redirect energy and reduce aphid problems. Stake tall varieties.
Companion Planting
Good Companions
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Check more plant combinations with our Companion Planting Checker →
Fava Beans in Other Locations
Frequently Asked Questions
When should I plant Fava Beans in Lake County, CA?
Lake County is in Zone 8b with an average last frost of March 2. Plan your Fava Beans planting based on this frost date — see the calendar above for exact timing.
What planting zone is Lake County, CA?
Lake County, California is in USDA Hardiness Zone 8b. The average last spring frost is March 2 and first fall frost is November 27.
Plan Your Garden with Confidence
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