An experiment was conducted in 12 crossbred calves for 112 days to assess the effect of dietary supplementation of organic selenium for growth. Calves of one week of age were divided into two groups of six each as uniformly as possible with regard to age, sex and body weight and allotted randomly to one of the two dietary treatments T, and T2. Calves of T, and T2 were offered standard calf starter as per B!S specifications and supplemented with organic selenium at 0 and 0.3 ppm respectively. Fresh green grass (Hybrid Napier) was supplied ad libitum throughout the experimental period. No significant difference could be observed in growth rate dry matter intake and feed efficiency of the calves between the groups. Average daily gain and total weight gain , respectively were 297.02 g and 33.27 kg for Tl and 311.90 g and 34.93 kg for TZ. Total dry matter intake was 103.81 and 105.89 kg and the feed conversion efficiencies were 3.33 and 3.15 respectively for T, and T2 . The percentage digestibility of dry matter, crude protein, crude fibre, ether extract and nitrogen free extract also did not differ significantly between groups. From a critical evaluation of the results obtained in the present study, it was inferred that dietary supplementation of 0.3ppm organic selenium did not improve the growth performance and nutrient utilization in cross bred calves. The feed cost per kilogram body weight gain for the calves in T, and T2 was Rs.163.32 and 155.11 respectively. There was a saving of Rs.8.21 for T2 over T,. The disease occurrence was low in selenium supplemented group when compared to the control group.