Fertilizing Tomatoes

Tomatoes are heavy feeders that benefit from regular fertilization throughout the season.

NPK Needs by Stage

Transplanting: High phosphorus (P) for root development. Vegetative growth: Balanced N-P-K. Flowering/fruiting: Lower nitrogen, higher phosphorus and potassium.

Fertilizer Schedule

1. At transplanting: Add compost and slow-release fertilizer to hole
2. 2 weeks after transplanting: Balanced liquid fertilizer
3. First flowers: Switch to low-nitrogen tomato fertilizer
4. Every 2 weeks until harvest: Continue tomato fertilizer

Calcium Matters

Calcium deficiency causes blossom-end rot. Add crushed eggshells, gypsum, or calcium spray.