NPK 20-10-10 Starter Mix
A high-nitrogen balanced NPK fertiliser formulated for the early vegetative stage of crop growth. The 20-10-10 ratio drives rapid green growth while providing enough phosphorus for root development and potassium for overall plant health.
How to Use
Test Your Soil First
Use a Soil pH Meter to check acidity. NPK fertilisers work best at pH 5.8–7.0. If pH is below 5.5, apply lime 4–6 weeks before planting and allow it to react before fertilising — acidic soils lock up phosphorus, wasting your fertiliser investment.
Basal Application (at Planting)
Apply 150–200 kg/ha (60–80 g per planting hole for maize at 50×75 cm spacing) at planting time. Place granules 5–7 cm beside and below the seed — not in direct contact. Seed-fertiliser contact causes scorching and poor germination.
Cover with Soil
After placing granules, cover with a thin layer of soil before placing the seed. This layer acts as a buffer and prevents direct seed-fertiliser contact while still placing nutrients in the root zone.
Top-Dress at 4 Weeks
Apply a second dose (100–150 kg/ha) when maize is at knee height (4–5 weeks after emergence). Apply in a ring around each plant 10 cm from the stem, then ridge or cover with soil to prevent volatilisation of nitrogen.
Water After Application
Granular NPK requires soil moisture to dissolve and become available to roots. Apply before expected rain or irrigate immediately after top-dressing. Dry granules sitting on the soil surface have minimal effect.
Storage
Store in a cool, dry, raised-off-ground location. NPK fertiliser is hygroscopic — it absorbs moisture from the air and clumps. Reseal bags tightly after each use. Clumped fertiliser can still be used but should be broken up before application for even distribution.
Key Features
High Nitrogen for Green Growth
20% nitrogen drives rapid leaf and stem development — critical in the first 6 weeks when the plant is building its photosynthetic capacity for the rest of the season.
Phosphorus for Roots
10% P₂O₅ supports root architecture development, early establishment, and uptake of other nutrients — most important in cold or dry soils at planting.
Potassium for Resilience
10% K₂O builds cell walls, improves drought tolerance, and strengthens the plant against lodging (stem breakage) and disease stress.
Granular Ease of Use
Uniform granule size (2–4 mm) flows easily through hand planters and mechanical spreaders. No dust, no clogging, even distribution.
Suitable for East African Soils
Formulated for the typically phosphorus-deficient, medium-CEC soils common in Tanzania — higher P and K ratios than some imported blends that assume high-fertility temperate soils.
Yield Proven
On-farm trials in Tanzania show 40–60% yield increases in maize when NPK 20-10-10 is applied at recommended rates versus unfertilised controls.
Application Tips & Nutrient Management
- Do not exceed 200 kg/ha at a single application — excess nitrogen causes vegetative excess at the expense of grain fill, and run-off nitrogen pollutes waterways.
- For maize, switch to a higher-potassium product (e.g., NPK 17-17-17 or Urea) at tasseling stage — the crop's N demand is highest then but P and K are less critical.
- If your soil pH is above 7.5, use ammonium sulphate instead of urea-based NPK — it has a slight acidifying effect and avoids ammonia volatilisation at high pH.
- For vegetables (tomatoes, cabbages), apply at 100 kg/ha basal and side-dress with Urea or CAN every 3 weeks for continuous nitrogen supply through the long growing period.
- Keep fertiliser bags off concrete floors — moisture wicks up through the bag and causes caking. Use wooden pallets or plastic sheeting.
