The point of this exploration was decides the feasibility of intercropping Indigofera zollingeriana (Iz) and Pennisetum purpureum (Pp) under coconut manor dependent on dry matter yield. This experimentati was led by Completely Randomized Design (CRD) with four treatment mix of establishing space, Iz with establishing space (1) 1.00m x 0.75m, (2) 1.00m x 1.25m, and Pp with establishing space (1) 1.00m x 0.50m, (2) 1.00m x 0.75m. Data collections were analyzed by disagreement analysis of variance and HSD test. The variables measured were aggressivity(A), competitive ratio (CR) and Actual Yield Loss (AYL). The results showed that planting space treatments had significant differences (P<0.01) on A, CR and AYL. The HSD evaluation showed that Iz was the predominant in many combinations establishing designs intercropping, Iz with extension 1.00m x 1.25m and Pp with extension 1.00m x 1.50m have highest A, CR and AYL. It conclusion, that intercropping Indigofera zollingeriana and Pennisetum purpureum cv Mott are feasibilty for all combination planting space, but the most suitable for Aggresivity, Coefficient Relative Crowding and Actual Yield Loss evaluation based on dry matter yield in the size area of 1.00m x 1.25m Indigofera zollingeriana and 1.00m x 0.50m Pennisetum purpureum cv  Mott as planting spacing under the coconut plantation.

Keywords : feasibility, intercropping, planting space.