When to Plant Napa Cabbage in Brule County, SD
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.
Brule County, South Dakota is in USDA Zone 4b. The average last spring frost is May 6 and the first fall frost is October 6, giving you a growing season of approximately 153 days.
At an elevation of 661 feet, Brule County receives approximately 29.2 inches of rainfall annually with predominantly loam soil. Summer highs average 80°F, so choose short-season varieties of Napa Cabbage to ensure they mature before fall.
Brule County Soil Profile
Soil Type
Loam
Soil pH
6.3-7.9
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.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Napa Cabbage Planting Timeline — Brule County, SD
Napa Cabbage Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 25 | Mar 25 – Apr 8 |
| Transplant Outdoors | May 6 | May 6 – May 20 |
| Direct Sow | April 29 | Apr 29 – May 20 |
| Fall Sowing | July 14 | Jul 14 – Jul 28 |
| Harvest | July 1 | Jul 1 – Aug 5 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | Start Indoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Fall Sowing Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Partial Shade (3-6 hours)
Water
High — keep soil consistently moist
Days to Maturity
55–75 days
Soil pH
6 – 7.5
USDA Zone
Zone 4b
Growing Season
153 days
Growing Tips for Brule County
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
Avoid Planting Near
Level Up Your Garden
Napa Cabbage in Other Locations
Frequently Asked Questions
When should I plant Napa Cabbage in Brule County, SD?
Brule County is in Zone 4b with an average last frost of May 6. Plan your Napa Cabbage planting based on this frost date — see the calendar above for exact timing.
What planting zone is Brule County, SD?
Brule County, South Dakota is in USDA Hardiness Zone 4b. The average last spring frost is May 6 and first fall frost is October 6.
Plan Your Garden with Confidence
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