Crossandra is an important traditional flower crop. Which is a herbaceous perennial an erect evergreen, sub shrub, growing upto 1m with glossy appearance. It is comes under the family of Acanthaceae, native to Southern India and Sri Lanka. The present investigation was carried out in the Department of Horticulture, Faculty of Agriculture, Annamalai University, Annamalai Nagar during 2019-2020 in Randomized Block Design with eleven treatments and three replications. Eleven treatment combinations were formed for foliar application of micronutrients viz., T1 – RDF + 0.2% ZnSO4, T2 – RDF + 0.2% FeSO4, T3 – RDF + 0.2% MgSO4, T4 – RDF + 0.2% ZnSO4 + 0.2% MgSO4, T5 – RDF + 0.2% ZnSO4 + 0.2% FeSO4, T6 – RDF + 0.5% ZnSO4, T7 - RDF + 0.5% FeSO4, T8 – RDF + 0.5% MgSO4, T9 – RDF + 0.5% ZnSO4 + 0.5% MgSO4, T10 – RDF + 0.5% ZnSO4 + 0.5% FeSO4 and T11 - RDF + water spray (Control) were studied on different micronutrient. The effect of treatments was studied based on their biometric observations viz., plant height (cm), number of branches per plant, number of leaves, plant spread per plant (cm2), leaf area (cm2), chlorophyll content (mg g-1) and dry matter production (g/plant). Among the eleven treatments, T10 exhibited maximum value followed by T5 for all characters except leaf area and chlorophyll content. The maximum leaf area was achieved by T10 followed by T9, whereas the highest value of chlorophyll content was noticed in T4 followed T5.