When to Plant Kohlrabi in Gulf County, FL
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.
Gulf County, Florida is in USDA Zone 8b. The average last spring frost is February 25 and the first fall frost is November 28, giving you a growing season of approximately 276 days.
At an elevation of 313 feet, Gulf County receives approximately 51.7 inches of rainfall annually with predominantly sand soil. Summer highs average 92°F, providing good warmth for Kohlrabi during the growing season. Sandy soil warms quickly in spring — great for early planting — but Kohlrabi will need more frequent watering and organic matter to retain nutrients. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Kohlrabi root diseases.
Gulf County Soil Profile
Soil Type
Sand
Soil pH
4.8-5.9
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 Gulf County
How your county's soil matches Kohlrabi's growing requirements.
Soil pH
Your soil pH (4.8–5.9) is more acidic than Kohlrabi prefers (6.0–7.5). Add garden lime to raise pH.
Soil Texture
Sandy soil in Gulf County warms quickly in spring but drains fast. Kohlrabi will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Kohlrabi.
Organic Matter
Organic matter is low (1.4%). Add 2-3 inches of compost before planting Kohlrabi.
How to Plant Kohlrabi
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Kohlrabi
Sow every 5.1 weeks. Last sowing by Sep 24 to harvest before frost.
For a dedicated fall crop, sow by Sep 19.
Plant Water Budget
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 | — | 2" | 0" | ❄️ Dormant |
| Feb | 3" | 2.6" | 0.4" | 💧 Light watering |
| Mar | 3" | 3.1" | 0" | ✅ Rainfall sufficient |
| Apr | 3" | 2.4" | 0.6" | 💧 Light watering |
| May | 3" | 3.5" | 0" | ✅ Rainfall sufficient |
| Jun | 3" | 7.1" | 0" | ✅ Rainfall sufficient |
| Jul | 3" | 8.4" | 0" | ✅ Rainfall sufficient |
| Aug | 3" | 7" | 0" | ✅ Rainfall sufficient |
| Sep | 3" | 6.6" | 0" | ✅ Rainfall sufficient |
| Oct | 3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Nov | 3" | 2.2" | 0.8" | 💧 Light watering |
| Dec | — | 2.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Feb–Nov in Gulf 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 — Gulf County, FL
Kohlrabi Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 21 | Jan 21 – Feb 4 |
| Transplant Outdoors | February 25 | Feb 25 – Mar 11 |
| Direct Sow | February 11 | Feb 11 – Mar 4 |
| Harvest | April 15 | Apr 15 – May 20 |
| Fall Sowing | September 19 | Sep 19 – Oct 3 |
Plant 0.5" deep · 4" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors |
| February | Start Indoors Transplant Outdoors Direct Sow |
| March | Transplant Outdoors Direct Sow |
| April | Harvest |
| May | Harvest |
| June | — |
| July | — |
| August | — |
| September | Fall Sowing |
| October | Fall Sowing |
| 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: too_acidic
🗺️ USDA Zone
Zone 8b
📆 Growing Season
276 days in Gulf County
Growing Tips for Kohlrabi in Gulf County
Direct sow Kohlrabi outdoors after February 25 in Gulf County when soil has warmed and frost danger has passed.
Sandy soil in Gulf County dries quickly — mulch Kohlrabi with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Your generous 277.0-day season in Gulf 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 Gulf County, FL?
Gulf County is in Zone 8b with an average last frost of February 25. Plan your Kohlrabi planting based on this frost date — see the calendar above for exact timing.
What planting zone is Gulf County, FL?
Gulf County, Florida is in USDA Hardiness Zone 8b. The average last spring frost is February 25 and first fall frost is November 28.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Gulf County gardeners in Zone 8b organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.