Seeds of Pennisetum americanum cv Bulk 1 were sowel in pots containing fine quartz and irrigated with demineralized water. Two days after the germination the young plant, three per pod, received complete nutrient solution diluted for 1:15 during 18 days. All the nutrient solutions were purified for the micronutrients content. After these period all pods were irrigated several times a day with demineralized water during 4 days. When the experiment start groups of 12 plants (3 pods) received the complete solution and solutions without one of the micronutrients (-B, -Cu, -Fe, -Mn, -Zn). The solutions were changed every 10 days. After 52 days of the experimental period the plants were collected and divided into items, sheaths new leaves, old leaves and ears. The material was dried to 70°C for several days and analysed by conventional methods. The authors concluded: No differences were observed by the dry matter productions of the plants in the treatments. The analytical levels of the elements in the new leaves of the complete treatment and with omission of the micronutrients were in ppm: B - 145-26; Cu - 0,53-0,10; Fe - 175-103; mn - 62-12; Zn - 27-12. A clear picture was obtained of the mal nutrition symptoms for the micronutrients less than for Mn.