Growing Garden Peas in Makueni

Soil suitability analysis based on Makueni's nutrient profile

Quick answer

Generally not ideal — Makueni is poorly suited to Garden Peas. Makueni's soil (pH 7.5, alkaline) gives Garden Peas a suitability score of 18/100. Match fertilizer to Makueni's nitrogen and phosphorus levels for the best result.

Makueni County is a challenging environment for Garden Peas (soil-match score 18/100) and will need significant amendment before planting. At an average pH of 7.5 the soil sits above Garden Peas's preferred 5.5–7 range, which can limit uptake of phosphorus and micronutrients. Nitrogen (0.86 g/kg), phosphorus (29.6 mg/kg) and potassium (351 mg/kg) all meet Garden Peas's requirements, so a maintenance fertilizer programme is enough. The county's predominantly sandy loam soils suit Garden Peas, which favours sandy loam. At 1000 m, the county sits below Garden Peas's preferred altitude range (1500–2600 m), which limits yield potential due to heat stress. On ShambaIQ's soil-match model, Garden Peas is the #94 soil match of the 106 crops we assess for Makueni County. Garden Peas's full potential is about 2,500 kg/acre (~KES 362,500/acre at KES 145/kg), but at Makueni's 18/100 suitability a realistic target here is closer to 563 kg/acre (~KES 81,635/acre) unless the constraints above are addressed.

Better matched to Makueni's soil: Lucerne, Mango, and Sisal — each scores higher on the same soil.

18Suitability score

Soil & climate match

FactorMakueni soilGarden Peas needsStatus
pH7.55.57Adjust
Nitrogen0.86 g/kgmin 0.5 g/kgOK
Phosphorus29.6 mg/kgmin 12 mg/kgOK
Potassium351 mg/kgmin 150 mg/kgOK
Rainfall600 mm800–2,100 mmLow
Altitude1,000 m1,500–2,600 mLow

Recommended seed varieties

Njabini (PI Moto super)Highland 1500-2600m
Simlaw Seeds · 60-90 days · 8-9 bags/acre
Dual purpose (fresh & dry); drought tolerant; requires vertical trailing.
GreenwichHighland 1600-2600m
Agventure Limited / RAGT · 90-120 days · 5-19 bags/acre
Large green grain; dual purpose; good soakability & rapid cookability.
KWS KariokaHighland 1600-2600m
Agventure Limited / KWS · 90-120 days · 5-17 bags/acre
Medium green grain; dual purpose; good color retention.
Blue MoonHighland 1200-2400m
Maribo DK · 120 days · 13-18 bags/acre
Good lodging resistance; strong straw; French-bred (2016).

Economics

Market priceKES 145/kg
Expected yield in Makueni563 kg/acre
Estimated revenueKES 81,635/acre
Adjusted for Makueni's 18/100 suitability. Under ideal conditions Garden Peas can reach 2,500 kg/acre (~KES 362,500/acre) — attainable here only after the climate and soil constraints below are addressed.

Preferred textureSandy Loam

Fertilizer prices

DAP
KES 3,500(6,500)
CAN
KES 2,875(5,700)
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