When to plant Kohlrabi in Douglas County, IL
Plant Kohlrabi in Douglas County, when soil hits 50°F — usually March 31. Continue planting through April 21 for the spring crop. A second sowing from August 8 to August 22 extends the harvest into fall.
When to Plant Kohlrabi in Douglas County, IL
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.
Douglas County, Illinois is in USDA Zone 6a. The average last spring frost is April 14 and the first fall frost is October 17, giving you a growing season of approximately 186 days.
At an elevation of 1,036 feet, Douglas County receives approximately 30.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 87°F, providing good warmth for Kohlrabi during the growing season.
Douglas County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Kohlrabi Planting Timeline — Douglas County, IL
Kohlrabi Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 10 | Mar 10 – Mar 24 |
| Transplant Outdoors | April 14 | Apr 14 – Apr 28 |
| Direct Sow | March 31 | Mar 31 – Apr 21 |
| Harvest | June 2 | Jun 2 – Jul 7 |
| Fall Sowing | August 8 | Aug 8 – Aug 22 |
Plant 0.5" deep · 4" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | — |
| June | Harvest |
| July | Harvest |
| August | Fall Sowing |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
45–65 days
🧪 Soil pH
Needs 6–7.5 · Your soil: N/A
🗺️ USDA Zone
Zone 6a
📆 Growing Season
186 days in Douglas County
Growing Tips for Douglas County
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 Douglas County, IL?
Douglas County is in Zone 6a with an average last frost of April 14. Plan your Kohlrabi planting based on this frost date — see the calendar above for exact timing.
What planting zone is Douglas County, IL?
Douglas County, Illinois is in USDA Hardiness Zone 6a. The average last spring frost is April 14 and first fall frost is October 17.
When should I plant Kohlrabi in Douglas County, IL?
In Douglas County, IL, plant Kohlrabi after the last frost (around April 14) and before the first frost (around October 17). Best results when soil holds above 50°F.
What growing zone is Douglas County, IL for Kohlrabi?
Douglas County sits in USDA Zone 6a. Kohlrabi grows reliably in zones 2a through 11b, so it's a good fit here.
Can Kohlrabi grow in Douglas County's climate?
Yes — Kohlrabi grows well in Douglas County's temperate climate. Douglas County averages a 186-day frost-free season, with last frost around April 14 and first frost around October 17.
Your Douglas County Garden Planner — Free
A 22-page printable planner built for Douglas County (Zone 6a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.