How to Grow Red Napa Treasure
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Red Napa Treasure
Brassica rapa subsp. pekinensis
vegetableRed Napa Treasure is a vibrant red-purple heading cabbage variety belonging to the napa or Chinese cabbage family, known for its elongated, slightly tapered head and tender, crispy leaves. It combines the mild, slightly sweet flavor of napa cabbage with striking crimson coloring that makes it visually appealing in both fresh and cooked dishes. This cool-season crop is prized for its tender texture and its use in both raw and Asian-inspired cuisine.
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Example Red Napa Treasure timeline · Pittsburgh, PA (Zone 6b)
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Plant Red Napa Treasure
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 Napa Treasure
Around Jun 26≈ 70 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Red Napa Treasure dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-8; can be grown in zone 3 with late spring planting and in zone 9 with fall planting
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Seedling
10-14 daysTiny cotyledons emerge with first true leaves appearing oval-shaped and slightly ruffled. Seedlings are delicate and light green.
Keep soil moist but not soggy. Provide bright light and maintain 65-70°F. Thin seedlings to proper spacing once true leaves appear.
Vegetative Growth
20-30 daysPlant develops a rosette of leaves that are deeply lobed with crimson-red coloring beginning to show. Leaves are tender and grow outward before heading begins.
Maintain consistent moisture and nutrient levels. Apply balanced fertilizer every 2-3 weeks. Monitor for pest damage and remove damaged outer leaves.
Head Formation
25-35 daysLeaves begin to curve inward, forming a loose to increasingly tight, elongated head. Deep red-purple color intensifies. Head gradually becomes more compact.
Reduce nitrogen slightly to avoid excessive leaf production. Continue consistent watering. Support developing heads if needed. Check for any pest damage.
Maturity
10-15 daysHead becomes firm and fully colored with vibrant crimson-red outer leaves and lighter colored inner leaves. Plant reaches full size with a dense, tight head.
Continue regular watering to prevent splitting. Watch for bolting in warm weather. Harvest when heads feel firm when gently squeezed.
Harvest
Harvest window 7-10 daysFully mature heads are ready for cutting at soil level. Inner leaves are pale pink to white with outer leaves deep crimson.
Cut heads cleanly with a sharp knife at the base. Remove and discard any damaged outer leaves. Store in cool, humid conditions immediately after harvest.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use row covers before pest presence; apply Bacillus thuringiensis (Bt) at first sign of damage; hand-pick visible caterpillars; encourage natural predators like parasitic wasps
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Apply Bt spray every 7-10 days during growing season; use neem oil; encourage native parasitoid wasps; inspect undersides of leaves for eggs
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Use floating row covers; apply kaolin clay spray; use neem oil; maintain adequate soil moisture; remove weeds that harbor beetles
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Spray with strong water stream to dislodge; use insecticidal soap; apply neem oil; encourage ladybugs and parasitic wasps
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Practice crop rotation; use disease-free seeds; remove infected leaves immediately; improve air circulation; avoid overhead watering
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Maintain soil pH above 6.5; practice 4-year crop rotation; remove infected plants; improve drainage; sterilize tools between plants
Uses
Raw salads and slaws
CulinaryThe tender, crispy leaves are excellent shredded raw in coleslaws, salads, and Asian-inspired noodle dishes. The mild flavor and attractive crimson color make it visually striking in fresh preparations. [source]
Stir-fries and Asian cooking
CulinaryRed Napa Treasure is traditionally used in Asian cuisine, particularly for stir-fries, soups, and kimchi-style fermented preparations where its tender texture and slight sweetness shine. [source]
Nutritional and anti-inflammatory benefits
MedicinalLike other brassicas, Red Napa Treasure is rich in glucosinolates and vitamin C, compounds with documented antioxidant and anti-inflammatory properties that support immune function and cellular health. [source]
Fermentation and preservation
HouseholdThe tender leaves ferment beautifully into kimchi, sauerkraut, and other preserved preparations, where the crimson color and mild flavor create unique visual and taste profiles. [source]
Pollinator and beneficial insect support
WildlifeIf allowed to bolt and flower, napa cabbage produces small yellow flowers that attract beneficial pollinators and parasitoid wasps that prey on pest insects in the garden. [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 feel firm and compact, typically 70-90 days after planting. Cut the head at soil level with a sharp knife, leaving the stem in the ground for potential secondary head production. For storage, remove outer damaged leaves and store at 32-40°F in high humidity (90-95%) for up to 3-4 months. Red Napa Treasure is best eaten fresh but also slices well for storage preservation.
Fun Facts
- 🌱 Red Napa Treasure gets its striking crimson color from anthocyanin pigments, the same compounds that color red wine and blueberries, which are powerful antioxidants.
- 🌱 Napa cabbage was first cultivated in China over 3,000 years ago and became the national vegetable of Korea, where it is essential for the traditional dish kimchi.
- 🌱 Unlike green napa cabbage, red varieties are somewhat more cold-hardy and develop deeper flavor after light frosts, making them excellent for fall harvests.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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