Spring onion farming in Kenya is a profitable venture due to the crop’s versatility and short maturity period. Here’s a comprehensive overview based on the details from the article by Zack Abuyeka:
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Varieties of Spring Onions Grown in Kenya
- White Lisbon: Known for its mild flavor and fast growth.
- Spring Green Bunching: Popular for its resistance to bolting.
- American Flag: Distinguished by its slightly thicker greens.
- Italian Giant: Renowned for its robust flavor and larger bulbs.
Ecological Requirements
- Soil: Light, well-drained soil with a pH of 6.0-7.0.
- Temperature: Optimal growth occurs between 15°C and 30°C.
- Rainfall: Requires well-distributed rainfall of 500-700mm.
- Altitude: Suitable for growing at an altitude of 500-2000m above sea level.
Propagation Methods
- Direct Seeding: Seeds are sown directly in the field.
- Nursery Raising: Seeds are initially sown in a nursery, and seedlings are later transplanted.
Nursery Preparation and Planting
- Prepare raised beds approximately 1 meter wide.
- Incorporate well-decomposed manure and phosphate fertilizers to enhance soil fertility.
- Sow seeds in furrows 5cm apart and 2cm deep, covering lightly with mulch for moisture retention.
- Germination occurs within about 10 days, after which mulch is used to provide partial shade.
Transplanting
- Done 4-6 weeks after sowing when seedlings reach 10-15cm in height.
- Ensure adequate watering pre- and post-transplanting.
Maintenance
- Top-dressing with Calcium Ammonium Nitrate (CAN) 4 weeks after transplanting, using about 9kg per acre.
Pests and Diseases
- Pests: Leaf miners, onion fly, and onion thrips.
- Diseases: Downy mildew, purple blotch, onion rust, and fusarium wilt.
- Control measures include the use of recommended pesticides, proper field hygiene, and crop rotation.
Harvesting
- Spring onions are ready for harvest about 2 months after planting.
- Harvest by uprooting the entire plant or cutting the leaves.
- Yield can be about 8 tonnes per acre.
Market Opportunities
Spring onions are in high demand in local markets and can be sold in open-air markets, grocery stores, and to institutions like schools and hotels. They are favored for their quick growth and adaptability to various climatic conditions in Kenya, making them a consistent crop for small to large scale farmers.
This cultivation guide should help potential and existing farmers to successfully grow and market spring onions in Kenya, leveraging their quick turnaround and high demand to achieve profitable yields.
