Best Fertilizer for Tomatoes During the Short Rains

⚡ Quick Answers

Should I use DAP or NPK for planting tomatoes?

For planting, NPK 17:17:17 or NPK 23:23:0 is better than standard DAP because tomatoes need Potassium (K) early on for root development and disease resistance.

When do I top-dress my tomato plants?

Top-dress with CAN (Calcium Ammonium Nitrate) 3-4 weeks after transplanting to boost vegetative growth and prevent Blossom End Rot.

The Importance of the Right Fertilizer for Tomatoes

Tomatoes are heavy feeders. During the short rains in Kenya, leaching of nutrients is common, making targeted fertilizer application critical.

Basal Application (Planting)

We highly recommend using an NPK blend rather than just DAP.

Why? Potassium is vital for fruit quality and disease resistance, especially in wet conditions where blight thrives.

Recommended: NPK 17:17:17 at a rate of 10g per hole.

Top Dressing Schedule

Stage	Weeks after Transplanting	Fertilizer Type	Rate per Plant
Vegetative Phase	3 - 4 weeks	CAN (Calcium Ammonium Nitrate)	10g
Flowering Phase	6 - 8 weeks	NPK 17:17:17 or YaraMila Winner	10g
Fruiting Phase	10+ weeks	Potassium Nitrate (Foliar feed)	50g / 20L

Preventing Blossom End Rot

A common issue during erratic rains is Blossom End Rot (the black rotting at the bottom of the tomato). This is caused by Calcium deficiency. Using CAN for top dressing is the best preventative measure because it supplies both Nitrogen and Calcium.