When to plant Komatsuna in Jersey County, IL
Plant Komatsuna in Jersey County after April 11; the prime window is March 28–April 18. A second sowing from August 12 to August 26 extends the harvest into fall.
When to Plant Komatsuna in Jersey County, IL
Komatsuna (Japanese mustard spinach) is a versatile Asian green with glossy, dark leaves and a mild, sweet flavor. It is extremely cold-hardy and heat-tolerant.
Jersey County, Illinois is in USDA Zone 6b. The average last spring frost is April 11 and the first fall frost is October 21, giving you a growing season of approximately 193 days.
At an elevation of 1,202 feet, Jersey County receives approximately 34.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 88°F, providing good warmth for Komatsuna during the growing season.
Jersey County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Komatsuna Planting Timeline — Jersey County, IL
Komatsuna Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 7 | Mar 7 – Mar 21 |
| Transplant Outdoors | April 11 | Apr 11 – Apr 25 |
| Direct Sow | March 28 | Mar 28 – Apr 18 |
| Harvest | May 16 | May 16 – Jun 20 |
| Fall Sowing | August 12 | Aug 12 – Aug 26 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | Harvest |
| June | Harvest |
| July | — |
| August | Fall Sowing |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
Moderate — regular watering
📅 Days to Maturity
35–50 days
🧪 Soil pH
Needs 6–7.5 · Your soil: N/A
🗺️ USDA Zone
Zone 6b
📆 Growing Season
193 days in Jersey County
Growing Tips for Jersey County
Direct sow in spring or fall. One of the most forgiving Asian greens for all seasons. Harvest outer leaves or cut whole plants. Excellent for stir-fries, soups, or salads.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Komatsuna in Other Locations
Frequently Asked Questions
When should I plant Komatsuna in Jersey County, IL?
Jersey County is in Zone 6b with an average last frost of April 11. Plan your Komatsuna planting based on this frost date — see the calendar above for exact timing.
What planting zone is Jersey County, IL?
Jersey County, Illinois is in USDA Hardiness Zone 6b. The average last spring frost is April 11 and first fall frost is October 21.
When should I plant Komatsuna in Jersey County, IL?
In Jersey County, IL, plant Komatsuna after the last frost (around April 11) and before the first frost (around October 21). Best results when soil holds above 50°F.
What growing zone is Jersey County, IL for Komatsuna?
Jersey County sits in USDA Zone 6b. Komatsuna grows reliably in zones 2a through 11b, so it's a good fit here.
Can Komatsuna grow in Jersey County's climate?
Yes — Komatsuna grows well in Jersey County's temperate climate. Jersey County averages a 193-day frost-free season, with last frost around April 11 and first frost around October 21.
Your Jersey County Garden Planner — Free
A 22-page printable planner built for Jersey County (Zone 6b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.