When to Plant Napa Cabbage in Kershaw County, SC
Top priorities for Kershaw County, South Carolina gardeners in May
Welcome to May in Zone 8a. These are the moves that will have the biggest impact on your growing season.
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Sow napa cabbage in trays indoors
Bottom-water once the first true leaves appear — it keeps stems dry and knocks back damping-off.
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Basket week: napa cabbage
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
June prep starts now
- First harvests: napa cabbage
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.
Kershaw County, South Carolina is in USDA Zone 8a. The average last spring frost is March 27 and the first fall frost is November 7, giving you a growing season of approximately 225 days.
At an elevation of 387 feet, Kershaw County receives approximately 60.7 inches of rainfall annually with predominantly clay loam soil. Summer highs average 97°F, so Napa Cabbage may need afternoon shade and extra watering during peak heat. Clay soil retains moisture well for Napa Cabbage, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Napa Cabbage root diseases.
Kershaw County Soil Profile
Soil Type
Clay Loam
Soil pH
5.4-6.3
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 Kershaw County
How your county's soil matches Napa Cabbage's growing requirements.
Soil pH
Your soil pH (5.4–6.3) is more acidic than Napa Cabbage prefers (6.0–7.5). Add garden lime to raise pH.
Soil Texture
The clay loam soil in Kershaw County is excellent for Napa Cabbage — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.6%). 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 24 to harvest before frost.
For a dedicated fall crop, sow by Aug 29.
Plant Water Budget
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 | — | 5.1" | 0" | ❄️ Dormant |
| Feb | — | 4.6" | 0" | ❄️ Dormant |
| Mar | 6.5" | 5.5" | 1" | 💧 Light watering |
| Apr | 6.5" | 4.9" | 1.6" | 💧 Light watering |
| May | 6.5" | 4.4" | 2.1" | 💧 Light watering |
| Jun | 6.5" | 6.3" | 0.2" | 💧 Light watering |
| Jul | 6.5" | 5.7" | 0.8" | 💧 Light watering |
| Aug | 6.5" | 5.6" | 0.9" | 💧 Light watering |
| Sep | 6.5" | 5" | 1.5" | 💧 Light watering |
| Oct | 6.5" | 3.9" | 2.6" | 💧 Light watering |
| Nov | 6.5" | 5.2" | 1.3" | 💧 Light watering |
| Dec | — | 4.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Kershaw 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 — Kershaw County, SC
Napa Cabbage Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 20 | Feb 20 – Mar 6 |
| Transplant Outdoors | March 27 | Mar 27 – Apr 10 |
| Direct Sow | March 13 | Mar 13 – Apr 3 |
| Harvest | May 22 | May 22 – Jun 26 |
| Fall Sowing | August 29 | Aug 29 – Sep 12 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors Transplant Outdoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | Harvest |
| June | Harvest |
| July | — |
| August | Fall Sowing |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1.5"/week · 1-2 times/week
📅 Days to Maturity
55–75 days
🧪 Soil pH
Needs 6–7.5 · Your soil: too_acidic
🗺️ USDA Zone
Zone 8a
📆 Growing Season
225 days in Kershaw County
Growing Tips for Napa Cabbage in Kershaw County
Direct sow Napa Cabbage outdoors after March 27 in Kershaw County when soil has warmed and frost danger has passed.
With Kershaw County's clay soil (27% clay), work in 3-4 inches of compost before planting Napa Cabbage. Avoid tilling when soil is wet to prevent compaction.
With summer highs reaching 97°F in Kershaw County, provide afternoon shade for Napa Cabbage and water deeply in the morning.
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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Check more plant combinations with our Companion Planting Checker →
Napa Cabbage in Other Locations
Frequently Asked Questions
When should I plant Napa Cabbage in Kershaw County, SC?
Kershaw County is in Zone 8a with an average last frost of March 27. Plan your Napa Cabbage planting based on this frost date — see the calendar above for exact timing.
What planting zone is Kershaw County, SC?
Kershaw County, South Carolina is in USDA Hardiness Zone 8a. The average last spring frost is March 27 and first fall frost is November 7.
Your Kershaw County Garden Planner — Free
A 24-page printable planner built for Kershaw County (Zone 8a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.