Best Organic Fertilizers for Tomatoes: Fish Emulsion and Tomato-Specific Blends

Tomatoes are heavy feeders. Two organic approaches deliver consistent results:

1. Fish Emulsion (Balanced, Proven)

• NPK ~5-1-1 or 4-1-1; micronutrients, amino acids.
• Apply per label (typically 1–2 tbsp/gal, every 2–3 weeks).
• Downside: Strong odor for 24 hrs after application.
• Brands: Neptune's Harvest, Alaska, Dr. Earth.

2. Tomato-Specific Organic Blends

• Example: Clean Air Gardening "Tomato Foodilizer" — formulated for fruit set, size, nutrition.
• Website: cleanairgardening.com/organictomato.html
• Contains calcium (prevents blossom end rot), magnesium, trace minerals.

Application Best Practices

• Start at transplant (dilute).
• Increase at flowering/fruit set.
• Water at base; avoid foliar feeding in humid conditions.
• Mulch to stabilize moisture.

Soil First

No fertilizer fixes poor soil. Incorporate compost, test pH (6.0–6.8), ensure calcium. Fertilizer supplements—soil sustains.