Abstract: Some trials were conducted in the Teaching and Research Farm of the Delta State University, Asaba Campus, Delta State, Nigeria in 2006 to determine the performance of teak seedlings under different planting media viz: top garden soil (TS), a mixture of top garden soil and sawdust in a ratio of 50:50 (TS/SD), sawdust (SD) and Sharp Sand (SS). The experiment was arranged in a Randomized Complete Block Design (RCBD) with four replications. The results indicated that the performance of the test plant as regards height, number of leaves, leaf area collar diameter and total leaf area was significantly (p≤0.05) higher in top garden soil when compared with seedlings grown in the other planting media. For example, while the height of the seedlings in TS at 6 Weeks After Transplanting (WAT) was 38.6 cm, the values of 29.4, 30.0 and 35.7 cm were recorded for seedlings planted in SS, SD and TS/SD at 6 WAT, respectively. This study has established that planting medium has a highly significant effect on the performance of teak seedlings. Top garden soil is therefore, recommended to teak growers in the tropical rainforest zone.