Watermelon farming guide — Kenya

Soil requirements

Growing conditions for Watermelon

Watermelon does best with 300–700 mm of rainfall a year at 0–1,500 m above sea level. In drier areas, irrigation or water harvesting closes the gap; outside the altitude band, growth and yields drop.

Optimizing soil and fertilizers for Watermelon in Kenya

To achieve maximum yields when farming watermelon in Kenya, managing soil suitability is crucial. This crop performs best within a soil pH range of 6 to 7.5. Soils that fall outside this range can lock out essential macro and micro-nutrients, leading to stunted growth or crop failure. For acidic soils, applying dolomitic or calcitic agricultural lime is recommended at least 30 days before planting to normalize acidity.

Fertilizer application should be calibrated based on the crop’s nutrient demands. Watermelon has a medium nitrogen requirement, medium phosphorus requirement, and medium potassium demand. Using certified seed varieties suited for your specific altitude and rainfall pattern, combined with a precise basal and top-dressing program (such as applying CAN at Week 3-4 after transplanting), ensures high crop quality and protects your overall farm investment.

How to grow watermelon in Kenya

1. 1
   Prepare the soil

   Ensure soil pH is between 6 and 7.5. Preferred texture: Sandy. Apply agricultural lime if your pH is below 6, ideally 30 days before planting.
2. 2
   Plant at the right time

   Select certified watermelon seed varieties suited to your altitude zone and plant at the onset of the rains.
3. 3
   Apply basal fertilizer

   Watermelon needs medium nitrogen, medium phosphorus, and medium potassium. Apply a balanced basal fertilizer such as DAP or NPK at planting.
4. 4
   Top-dress

   At Week 3-4 after transplanting, apply 0.5 bag(s) per acre of CAN. Apply at vine development stage. Stop nitrogen at flowering — excess N promotes leaves over fruits.
5. 5
   Monitor and harvest

   Scout regularly for pests and disease. Expected yield is about 15,000 kg/acre at roughly KES 10/kg.

Best counties for Watermelon

Challenging counties for Watermelon

These counties may need soil amendments for Watermelon

Certified seed varieties