When to Plant Kohlrabi in Yuba County, CA
April in Yuba County, California — your action list
We've pulled the most time-sensitive tasks for Yuba County, California this April and put them front and centre. Tackle them in order.
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Harden off and plant kohlrabi
Your last frost (April 22) has passed. These warm-season crops can handle outdoor soil now.
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Direct-sow kohlrabi
Sow every 2 weeks for a continuous harvest. A single big planting means a single big glut.
A few tasks this April that'll pay off in May
- Starting indoors: kohlrabi
Kohlrabi is an unusual brassica that forms a swollen stem above ground with a mild, sweet turnip-like flavor. Both the bulb and tender leaves are edible.
Yuba County, California is in USDA Zone 9a. The average last spring frost is April 22 and the first fall frost is November 9, giving you a growing season of approximately 201 days.
At an elevation of 303 feet, Yuba County receives approximately 26.5 inches of rainfall annually with predominantly loam soil. Summer highs average 94°F, providing good warmth for Kohlrabi during the growing season.
Yuba County Soil Profile
Soil Type
Loam
Soil pH
6.3-7.3
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 Yuba County
How your county's soil matches Kohlrabi's growing requirements.
Soil pH
Your soil pH (6.3–7.3) is within Kohlrabi's preferred range (6.0–7.5).
Soil Texture
The loam soil in Yuba County is excellent for Kohlrabi — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.5%). Annual compost additions will help Kohlrabi.
How to Plant Kohlrabi
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Succession Planting Kohlrabi
Sow every 5.1 weeks. Last sowing by Sep 05 to harvest before frost.
For a dedicated fall crop, sow by Sep 14.
Plant Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Kohlrabi
Kohlrabi needs approximately 0.7 inches of water per week (3" per month). Here's how your county's rainfall compares month by month.
| Month | Kohlrabi Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4.9" | 0" | ❄️ Dormant |
| Feb | — | 5.6" | 0" | ❄️ Dormant |
| Mar | — | 4.6" | 0" | ❄️ Dormant |
| Apr | 3" | 2.2" | 0.8" | 💧 Light watering |
| May | 3" | 0.7" | 2.3" | 🚿 Regular watering |
| Jun | 3" | 0.2" | 2.8" | 🚿 Regular watering |
| Jul | 3" | 0" | 3" | 🚿 Regular watering |
| Aug | 3" | 0" | 3" | 🚿 Regular watering |
| Sep | 3" | 0.3" | 2.7" | 🚿 Regular watering |
| Oct | 3" | 1.1" | 1.9" | 🚿 Regular watering |
| Nov | 3" | 2.8" | 0.2" | 💧 Light watering |
| Dec | — | 4.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Nov in Yuba County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Kohlrabi 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.
Kohlrabi Planting Timeline — Yuba County, CA
Kohlrabi Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 25 | Mar 25 – Apr 8 |
| Transplant Outdoors | April 22 | Apr 22 – May 6 |
| Direct Sow | April 1 | Apr 1 – Apr 22 |
| Harvest | June 10 | Jun 10 – Jul 15 |
| Fall Sowing | September 14 | Sep 14 – Sep 28 |
Plant 0.5" deep · 4" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Transplant Outdoors Direct Sow |
| May | Transplant Outdoors |
| June | Harvest |
| July | Harvest |
| August | — |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.7"/week · Only during dry spells
📅 Days to Maturity
45–65 days
🧪 Soil pH
Needs 6–7.5 · Your soil: ideal
🗺️ USDA Zone
Zone 9a
📆 Growing Season
201 days in Yuba County
Growing Tips for Kohlrabi in Yuba County
Direct sow Kohlrabi outdoors after April 22 in Yuba County when soil has warmed and frost danger has passed.
Your generous 201.0-day season in Yuba County allows multiple plantings of Kohlrabi. Sow every 22.0 days for continuous harvest.
Common pests for Kohlrabi in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow in spring or fall. Harvest when bulbs are 2-3 inches in diameter for best texture and flavor. Larger bulbs may become woody and fibrous.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Kohlrabi in Other Locations
Frequently Asked Questions
When should I plant Kohlrabi in Yuba County, CA?
Yuba County is in Zone 9a with an average last frost of April 22. Plan your Kohlrabi planting based on this frost date — see the calendar above for exact timing.
What planting zone is Yuba County, CA?
Yuba County, California is in USDA Hardiness Zone 9a. The average last spring frost is April 22 and first fall frost is November 9.
Your Yuba County Garden Planner — Free
A 24-page printable planner built for Yuba County (Zone 9a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.