How to Grow Red Cabbage January King
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Red Cabbage January King
Brassica oleracea var. capitata f. rubra
vegetableJanuary King is a hardy red cabbage variety known for its excellent cold tolerance and ability to overwinter in mild climates. It produces medium-sized, deep red heads with a dense texture and sweet flavor that improves after frost exposure. This heirloom variety is prized for late autumn and winter harvests across temperate regions.
When should you plant Red Cabbage January King in your zone?
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Example Red Cabbage January King timeline · Pittsburgh, PA (Zone 6b)
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Plant Red Cabbage January King
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Red Cabbage January King
Around Jul 21≈ 95 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Red Cabbage January King dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; particularly valued in zones 5-8 for fall/winter production
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Seedling
2-3 weeksSmall, cotyledon leaves followed by true leaves emerge. Plant remains low and compact.
Keep soil consistently moist. Provide bright light if growing indoors. Thin or transplant when 2-3 true leaves appear.
Vegetative (Leaf Development)
6-8 weeksMultiple blue-green leaves form in a rosette pattern. Plant rapidly increases in size and leaf count.
Maintain consistent watering and nutrition. Apply balanced fertilizer every 3-4 weeks. Monitor for pests. Mulch to retain moisture and regulate soil temperature.
Head Formation
4-6 weeksOuter leaves begin to curl inward and consolidate. A compact, dense head forms at the plant center.
Ensure consistent moisture and continued fertilization with nitrogen-rich fertilizer. Support heavy heads with stakes if needed. Remove any diseased or yellowing outer leaves.
Maturation & Cold Hardening
2-4 weeks; can hold 8+ weeks in fieldHead becomes increasingly dense and darkens to deep purple-red. Flavor sweetens noticeably after light frost exposure (29-32°F).
Light frost actually improves flavor and sweetness. Reduce watering to concentrate sugars. No fertilizer needed. January King can remain in ground through multiple frosts.
Harvest Ready
Variable; ready from October through JanuaryHead is firm, dense, and deeply colored. Outer wrapper leaves may show frost damage but interior remains pristine.
Harvest before severe freezing (below 15°F). Cut at soil level. Store in cool location (32-40°F, high humidity) for extended shelf life (3-4 months).
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Row covers over young plants, hand-pick caterpillars, Bacillus thuringiensis (Bt) spray, netting to exclude adults
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Row covers, Bt spray, insecticidal soap, neem oil, encourage natural predators like parasitic wasps
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Hand-pick, Bt spray, spinosad-based insecticides, row covers on young plants
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Row covers, diatomaceous earth on foliage, neem oil, kaolin clay spray
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Hand-pick and destroy eggs on leaf undersides, row covers, reflective mulch, encourage beneficial wasps
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Maintain pH 7.0+, crop rotation (3-4 years away from brassicas), resistant varieties, remove infected plants entirely
Uses
Raw salads & slaws
CulinaryThe deep red color and crisp texture make January King excellent for fresh slaws and salads. The sweet flavor after frost exposure balances vinegar-based dressings perfectly. [source]
Braised & slow-cooked dishes
CulinaryIts dense structure holds up beautifully to braising, pickling, and fermentation. Classic preparations include braised red cabbage with apples or vinegar-based preparations. [source]
Anti-inflammatory & antioxidant benefits
MedicinalRed cabbage is rich in anthocyanins and vitamin C, compounds with anti-inflammatory and antioxidant properties. Traditionally used to support immune function and digestive health. [source]
Natural pH indicator dye
HouseholdThe anthocyanin pigments in red cabbage juice change color in acidic or alkaline solutions, making it a popular educational pH indicator in chemistry demonstrations. [source]
Natural fabric dyes
CraftRed and purple tones can be extracted and used as natural dyes for textiles and paper, creating lasting color with proper mordants. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest when heads are firm and dense, after experiencing at least one light frost for best flavor development (typically October-January in cool climates). Cut heads at soil level with a sharp knife, leaving stem and roots to potentially produce smaller secondary heads. The variety's cold hardiness allows field storage; heads can be harvested through winter until sustained freezing below 15°F. For storage, remove outer wrapper leaves, keep in cool (32-40°F), high-humidity environment (root cellar, cooler); heads store 3-4 months. Handle carefully to avoid bruising, which accelerates decay.
Fun Facts
- 🌱 January King's superior cold hardiness comes from its ability to accumulate sugars and protective compounds in response to frost exposure—the colder it gets, the sweeter the cabbage tastes, making it prized for winter harvests in Northern Europe.
- 🌱 Red cabbage varieties contain powerful anthocyanin pigments that change color based on soil pH; acidic soils produce more purple tones while alkaline soils shift toward blue hues, making it a living pH indicator in the garden.
- 🌱 This heirloom variety has been grown since at least the 19th century and was named for its ability to survive through January in traditional British kitchen gardens, making it one of the most reliably long-season brassicas available.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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