Fertilizing Melons: Schedule, Rates, and Avoiding Excess Nitrogen

For healthy vines and sweet fruit, melons need a measured feeding program—not too much nitrogen.

Baseline Application

Apply 3 lbs of 5-10-10 per 100 sq ft (≈1.33 kg per 10 m²) before planting or around young seedlings.

Adjust for Stronger Fertilizers

• 10-10-10 → use half the weight (1.5 lbs / 100 sq ft)
• 15-15-15 → use one-third (1 lb / 100 sq ft)

Timing: Three Feedings Total

1. At planting / early seedling stage – baseline rate.
2. When vines begin to “run” (send out trailing side shoots) – repeat baseline rate between rows.
3. At fruit set – final application.

Space applications over 3–4 months. Avoid high-nitrogen fertilizers (e.g., 20-10-10) after vines run; excess N promotes foliage at the expense of fruit quality.