This study was conducted to select the best particle size of coco peat for green house tomato nurseries and develop the easy use compressed coco peat pellets mixed with fertilizer for nurseries of tomato. The experiment was carried out in International Foodstuff Company and Faculty of Agriculture, University of Ruhuna, Sri Lanka during 2015 to 2016. Under experiment one, three types of different particle sizes were used; namely fine (≤0.5mm) (T2), medium (3mm-0.5mm) (T3) and coarse (4mm<) (T4) with normal coco peat (T1) as treatments. Complete Randomized Design (CRD) used as experimental design with five replicates. Germination percentage, number of leaves per seedling, seedling height in frequent day intervals was taken as growth parameters. Analysis of variance procedure was applied to analyze the data at 5% probability level. The results revealed that medium size particle media (sieve size 0.5mm -3mm) of coco peat was the best particle size for tomato nursery practice, when considered the physical and chemical properties of medium particles of coco peat. In the experiment of selecting of fertilizer and mixing rate of fertilizer; Yara mix fertilizer was better than Albert’s solution. However type of fertilizers and diameters of the pellet, were not significantly affect for germination, but pellets which 32mm in diameter with mixed 5.5g/kg Yara mix fertilizer combination was shown significantly high vegetative growth.