Growing Vine Spinach (Nderema) in Tharaka Nithi

Soil suitability analysis based on Tharaka Nithi's nutrient profile

Tharaka Nithi County is a solid choice for Vine Spinach (Nderema), with a soil-match score of 69/100. At an average pH of 4.99 the soil is strongly acidic, below Vine Spinach (Nderema)'s preferred 5.8–7 range; agricultural lime will lift pH and unlock phosphorus the crop cannot otherwise access. Nitrogen (1.23 g/kg), phosphorus (19.6 mg/kg) and potassium (211 mg/kg) all meet Vine Spinach (Nderema)'s requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy loam soils suit Vine Spinach (Nderema), which favours loam. Vine Spinach (Nderema)'s full potential is about 5,000 kg/acre (~KES 250,000/acre at KES 50/kg), but at Tharaka Nithi's 69/100 suitability a realistic target here is closer to 4,313 kg/acre (~KES 215,650/acre) unless the constraints above are addressed.

69Suitability score

Soil & climate match

FactorTharaka Nithi soilVine Spinach (Nderema) needsStatus
pH4.995.87Adjust
Nitrogen1.23 g/kgmin 1.2 g/kgOK
Phosphorus19.6 mg/kgmin 12 mg/kgOK
Potassium211 mg/kgmin 150 mg/kgOK
Rainfall900 mm800–1,800 mmOK
Altitude1,100 m0–2,000 mOK

Planting calendar

Long Rains

Month 1
Direct Sowing & Basal
Month 2
Trellising & Top Dressing
Month 3
Continuous Harvest

Short Rains

Month 1
Direct Sowing & Basal
Month 2
Trellising & Top Dressing
Month 3
Continuous Harvest

Top dressing guide

Product
CAN
Timing
Week 2 and after each harvest
Instruction
Top-dress after each cutting for continuous leafy regrowth.
Bags per Acre
0.3

Economics

Market priceKES 50/kg
Expected yield in Tharaka Nithi4,313 kg/acre
Estimated revenueKES 215,650/acre
Adjusted for Tharaka Nithi's 69/100 suitability. Under ideal conditions Vine Spinach (Nderema) can reach 5,000 kg/acre (~KES 250,000/acre) — attainable here only after the climate and soil constraints below are addressed.

Preferred textureLoam

Fertilizer prices

DAP
KES 3,500(6,500)
CAN
KES 2,875(4,500)
NPK 17:17:17
KES 3,275(5,600)
Urea
KES 3,500(5,500)
Lime
KES 1,500(1,800)

Green = subsidized · (Commercial) per 50kg bag