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Knol Khol / Kohlrabi

ग्याँठ गोभी (Gyanth Gobhi)
📖 Brassica oleracea var. gongylodes L.
Verified Agricultural Data (NARC) Brassicas & Cole 📅 Ashwin (असोज) – Magh (माघ) 🌡️ 12–22°C ⚗️ pH 6.0–6.8 ⏱️ 50-65 days
Growing Season & Schedule
🌱
Recommended Growing Window: Ashwin (असोज) – Magh (माघ)

Knol Khol knolls reach tender harvestable size (6-8 cm diameter) in 50 to 65 days after transplanting. Early winter vegetable suited for mid-hills and plains.

Description & Overview
Crisp, turnip-like swollen brassica stem vegetable popular in winter home kitchen gardens throughout Nepal. Sweet mild flavor eaten raw or spiced in curries.
Details & Agronomic Insights
🌟 Positive Attributes & Health Benefits

Low-calorie vegetable with high Vitamin C (exceeding oranges per 100g), dietary fiber, Vitamin B6, and potassium. Promotes metabolism and immune defense.

⚠️ Precautions & Adverse Notes

Late harvest causes woody, tough, stringy fiber texture that diminishes culinary and nutritional quality.

🐛 Major Diseases & Pests

Damping-off in seedlings, Downy Mildew, Black Rot, and Cabbage Butterfly caterpillars.

💊 Disease & Pest Solutions
  • Harvest knobs when tender and crisp before fibrous skin toughens.
  • Spray Neem seed extract or handpick cabbage butterfly caterpillars on small garden plots.
  • Rotate with non-brassica crops for at least 2 seasons.
🧪 Fertilizer & Nutrition Recommendations

Apply 15-20 tons FYM/ha. NPK: 80:50:50 kg/ha. Apply half N, all P and K at bed preparation; top dress remaining N at 25 days after transplanting.

Planting & Cultivation Guide
🌱 Planting Method Direct Seeding
📏 Seed Depth 2.0 cm
↔️ Seed Spacing 30.0 cm
📐 Row Spacing 60.0 cm
🪱 Soil Type Well-drained fertile loam
💧 Water Requirement Medium (450-600 mm, regular watering)
☀️ Sunlight 5-7 hours direct sun
🧪 NPK Dose 100:60:40 NPK kg/ha
Climate & Altitude Requirements
⛰️ Altitude Range 100–2000 m
🗺️ Suitable Regions Terai, Mid-Hills
🌡️ Temperature Range 12–22°C
⚗️ Optimal pH 6.0–6.8
Harvest Information & Yield
⏱️ Maturity Days 50-65 days
📦 Expected Yield 15 - 25 t/ha
🔍 Harvest Indicators:

Harvest when crop reaches optimal market maturity and full color

Seasonal Calendar — रोप्ने पात्रो
Activity / कार्य Start Month (BS) End Month (BS) Region / क्षेत्र Gregorian Window
🌱 Sowing असोज (Ashwin) कार्तिक (Kartik) All Nepal September - November
🌾 Harvesting मंसिर (Mangsir) माघ (Magh) All Nepal November - January
Quick Reference
Verified
🌱 Method Direct Seeding
📅 Season Ashwin (असोज) – Magh (माघ)
⏱️ Matures 50-65 days
💧 Water Medium (450-600 mm, regular watering)
☀️ Sunlight 5-7 hours direct sun
🪱 Soil Well-drained fertile loam
🗺️ Regions Terai, Mid-Hills
🌡️ Temp 12–22°C
⚗️ pH 6.0–6.8
📏 Depth 2.0 cm
📦 Yield 15 - 25 t/ha
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