16 combinations of 4 Fe and 4 Zn  foliar spray solutions of Fe₀, Fe₁, Fe₂ and Fe₃ and similars of Zn₀,Zn₁, Zn₂ and Zn₃  (mgL^-1) i.e. 0, 250-nano, 500-nano and 1000-micro (ordinary) FeL^-1 were sprayed on   snap bean (Phaseolus Vulgaris). Sources were FeSO₄.7H₂O and ZnSO₄.7H₂O. Spraying was done on days 37, 44   , 51    and 58   after seeding. Plants of Zn₀Fe₁ gave the lowest fresh yield of 652 kgha^-1, while plants of Zn₂Fe₃ gave the highest yield of 1156 kgha^-1 with an increase of 77.3% over the lowest Applying Zn or Fe singly or various combinations proved of positive effect. A decrease in yields occurred by application of Zn and Fe at the high dose of 1000 mgL^-1 indicating a retarding effect at such high concentrations.