Why 20-20-20 Fertilizer Is Too Strong for Tomatoes

A balanced 20-20-20 fertilizer delivers excessive nitrogen for tomatoes, promoting lush foliage at the expense of fruit. If you must use it, dilute to ¼–½ the label rate.

Better Feeding Practices

• Use a tomato-specific fertilizer higher in phosphorus and potassium (e.g., 5-10-10).
• Rain barrel water is excellent—let tap water sit 2–3 days to dissipate chlorine before using.

Moderate, targeted feeding yields more fruit, not just leaves.