A field experiment was conducted for study the effect of humic acid and Zinc on the growth and yield of tomato. Eight treatments were applied through foliage on 30 and 50 days after transplanting. Treatments consisted of T1-control, T2-Humic acid (0.3%solution), T3-NAA 50ppm, and T4- Zinc sulphate@0.5%, T5-Humic acid + NAA, T6-Humic acid+ Zinc sulphate@0.5%, T7-NAA + Zinc sulphate@0.5%, T8-Humic acid + NAA + Zinc sulphate@0.5%. The results obtained in the experiments clearly revealed that application of Humic acid either alone or in combination with NAA and/ or Zinc sulphate@0.5%favourably improved the yield of tomato. Combined application of humic acid with NAA and Zinc sulphate@0.5% recorded the highest yield and best quality fruits. Among the eight treatments T8 (Humic acid+ NAA + Zinc sulphate@0.5%) produced the best quality fruit by recording the highest value of TSS (6.4), lowest titrable acidity 42%) and highest amount of ascorbic acid (26.54 mg per 100ml of juice). This was followed by T6 (Humic acid + Zinc sulphate@0.5%). Sole application of humic acid, NAA and Zinc sulphate@0.5% also recorded the significant improvement in the quality of tomato as compared to control. The unsprayed control recorded the poor quality fruit among the eight treatments (TSS- 5.2, titrable acidity -0.66%, vitamin C- 6.52 mg /100 ml juice). Firmness of fruit is not significantly influenced by these treatments. But, the fruit colour was favourably improved by the foliar application of Zinc sulphate and NAA enriched humic acid.