Abstract this study aimed to determine the effect of varietas and dose phosphate fertilizer on the growth of rice plants (oryza sativa l.). this study was conducted on 10 september to 17 desember 2012 at the experimental farm, faculty of agriculture, syiah kuala university, banda aceh. the experimental design used in this study were randomized block design (rbd) 6 x 4 factorial with 3 replications. there are two factors studied were varieties (situ bagendit, inpari 1, sigupai, siputeh, aweuh, and sanbei), and phosphate fertilizer (0, 100, 200, and 300 kg p ha-1). variables measured include high plant and tiller number of each at the age of 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 wap (weeks after plant), plant fresh weight, root length, shoot dry weight, root dry weight, and root shoot ratio at the age 10 wap. the results of this study showed that the interaction between treatment and dose sanbei varieties of phosphate fertilizer as much as 300 kg p ha-1 is the best treatment combination.