The experiment was conducted inside a wooden canopy in a private nursery in Kirkuk Governorate Iraq, to determine the effect of organic fertilizer (wheat waste factory) and phosphate fertilizer using rock phosphate fertilizer and superphosphate fertilizer and their interactions on five month old seedlings of three citrus rootstocks (Narainj and Sunicle Stromello and Volcameriana ). The study used a randomized complete block design (R.C.B.D.) with three replications. The least significant difference (LSD) was used to compare the means at a probability level of 0.05. The traits were taken 3 and 5 months after the fertilizer combinations. The results indicated that the Sonicel Stromelo Origin outperformed the Naring Origin in the dry weight traits of vegetative and root system mass and the leaf NPK content traits in 3-5 months. Fertilizer combinations (10g organic fertilizer + 2g phosphate rock) significantly affected the other fertilizers combinations used for all the studied traits. As for the interaction between origins and fertilizer combinations used, the interaction between organic fertilizer (10g organic fertilizer + 2 g phosphate rock) and Sonicel Stromelo significantly affected the dry weight of vegetative and root system, and leaf NPK content.