When to Plant Napa Cabbage in Kodiak Island Borough, AK
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.
Kodiak Island Borough, Alaska is in USDA Zone 6a. The average last spring frost is May 13 and the first fall frost is September 29, giving you a growing season of approximately 139 days.
At an elevation of 2,281 feet, Kodiak Island Borough receives approximately 27.7 inches of rainfall annually with predominantly silt loam soil. Summer highs average 60°F, so choose short-season varieties of Napa Cabbage to ensure they mature before fall.
Kodiak Island Borough Soil Profile
Soil Type
Silt Loam
Soil pH
5.1-6.5
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
Napa Cabbage Planting Timeline — Kodiak Island Borough, AK
Napa Cabbage Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 8 | Apr 8 – Apr 22 |
| Transplant Outdoors | May 13 | May 13 – May 27 |
| Direct Sow | April 29 | Apr 29 – May 20 |
| Fall Sowing | July 21 | Jul 21 – Aug 4 |
| Harvest | July 8 | Jul 8 – Aug 12 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Fall Sowing Harvest |
| August | Fall Sowing 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 6a
Growing Season
139 days
Growing Tips for Kodiak Island Borough
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 Kodiak Island Borough, AK?
Kodiak Island Borough is in Zone 6a with an average last frost of May 13. Plan your Napa Cabbage planting based on this frost date — see the calendar above for exact timing.
What planting zone is Kodiak Island Borough, AK?
Kodiak Island Borough, Alaska is in USDA Hardiness Zone 6a. The average last spring frost is May 13 and first fall frost is September 29.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Kodiak Island Borough gardeners in Zone 6a organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.