When to plant Napa Cabbage in Jackson County, MO
In Zone 6b (Jackson County), direct-sow Napa Cabbage between March 29 and April 19 for spring, after the April 12 last-frost mark. A second sowing from August 17 to August 31 extends the harvest into fall.
When to Plant Napa Cabbage in Jackson County, MO
Your June planting checklist for Jackson County, Missouri
Welcome to June in Zone 6b. These are the moves that will have the biggest impact on your growing season.
Napa cabbage forms tall, barrel-shaped heads with tender, crinkled leaves and a mild, slightly sweet flavor. It is the primary cabbage used for kimchi.
Jackson County, Missouri is in USDA Zone 6b. The average last spring frost is April 12 and the first fall frost is October 26, giving you a growing season of approximately 197 days.
At an elevation of 563 feet, Jackson County receives approximately 40.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 90°F, providing good warmth for Napa Cabbage during the growing season.
Jackson County Soil Profile
Soil Type
Silt Loam
Soil pH
5.2-6.6
Drainage
Well Drained
Napa Cabbage 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 Jackson County
How your county's soil matches Napa Cabbage's growing requirements.
Soil pH
Your soil pH (5.2–6.6) is more acidic than Napa Cabbage prefers (6.0–7.5). Add garden lime to raise pH.
Soil Texture
The silt loam soil in Jackson County is excellent for Napa Cabbage — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (3.1%). Annual compost additions will help Napa Cabbage.
How to Plant Napa Cabbage
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Napa Cabbage
Sow every 6.3 weeks. Last sowing by Aug 12 to harvest before frost.
For a dedicated fall crop, sow by Aug 17.
Napa Cabbage Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Napa Cabbage
Napa Cabbage needs approximately 1.5 inches of water per week (6.5" per month). Here's how your county's rainfall compares month by month.
| Month | Napa Cabbage Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.5" | 0" | ❄️ Dormant |
| Feb | — | 1.6" | 0" | ❄️ Dormant |
| Mar | — | 3.2" | 0" | ❄️ Dormant |
| Apr | 6.5" | 4.2" | 2.3" | 💧 Light watering |
| May | 6.5" | 5.4" | 1.1" | 💧 Light watering |
| Jun | 6.5" | 4.8" | 1.7" | 💧 Light watering |
| Jul | 6.5" | 4.2" | 2.3" | 💧 Light watering |
| Aug | 6.5" | 4.1" | 2.4" | 💧 Light watering |
| Sep | 6.5" | 3.6" | 2.9" | 💧 Light watering |
| Oct | 6.5" | 2.9" | 3.6" | 🚿 Regular watering |
| Nov | — | 3.2" | 0" | ❄️ Dormant |
| Dec | — | 2" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Jackson County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Napa Cabbage 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.
Napa Cabbage Planting Timeline — Jackson County, MO
Napa Cabbage Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 8 | Mar 8 – Mar 22 |
| Transplant Outdoors | April 12 | Apr 12 – Apr 26 |
| Direct Sow | March 29 | Mar 29 – Apr 19 |
| Harvest | June 7 | Jun 7 – Jul 12 |
| Fall Sowing | August 17 | Aug 17 – Aug 31 |
Plant 1" deep · 15" apart · Rows 24" 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
Partial Shade (3-6 hours)
💧 Water
1.5"/week · 2-3 times/week
📅 Days to Maturity
55–75 days
🧪 Soil pH
Needs 6–7.5 · Your soil: too_acidic
🗺️ USDA Zone
Zone 6b
📆 Growing Season
197 days in Jackson County
Growing Tips for Napa Cabbage in Jackson County
Direct sow Napa Cabbage outdoors after April 12 in Jackson County when soil has warmed and frost danger has passed.
Common pests for Napa Cabbage in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
Best grown as a fall crop. Direct sow in late summer, 60-70 days before first frost. Keep soil evenly moist. Bolt-resistant varieties are available for spring planting.
Companion Planting
Good Companions
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Napa Cabbage in Other Locations
Frequently Asked Questions
When should I plant Napa Cabbage in Jackson County, MO?
Jackson County is in Zone 6b with an average last frost of April 12. Plan your Napa Cabbage planting based on this frost date — see the calendar above for exact timing.
What planting zone is Jackson County, MO?
Jackson County, Missouri is in USDA Hardiness Zone 6b. The average last spring frost is April 12 and first fall frost is October 26.
When should I plant Napa Cabbage in Jackson County, MO?
In Jackson County, MO, plant Napa Cabbage after the last frost (around April 12) and before the first frost (around October 26). Best results when soil holds above 50°F.
What growing zone is Jackson County, MO for Napa Cabbage?
Jackson County sits in USDA Zone 6b. Napa Cabbage grows reliably in zones 2a through 11b, so it's a good fit here.
Can Napa Cabbage grow in Jackson County's climate?
Yes — Napa Cabbage grows well in Jackson County's temperate climate. Jackson County averages a 197-day frost-free season, with last frost around April 12 and first frost around October 26.
Your Jackson County Garden Planner — Free
A 22-page printable planner built for Jackson 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.