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This study has been conducted at the nursery of Forestry Department , College of Agriculture and Forestry , Mosul University , Mosul , Iraq.from the beginning of march until the end of December , 2012. This study was to investigate the effect of concentrations of organic manure (zero , 1, 2 gm/l) and the concentrations Gibberellic Acid (zero , 20 ,40 mg/l) and sprayings occation (two and four) on the growth of <em>Biota oreintalis </em>Endl. seedlings. The following characters were studied: increase of growth length (cm), Stem diameter (mm), increase of number of branches per seedling , Main root length (cm) , Main root diameter (mm). So results can be summarized as follows:<br /> <br /> The concentrations of organic manure effected significantly in all characters and concentration (1 gm / l) caused significant increase in all characters.<br /> Spraying with (40 mg/l) of gibberellic acid caused significant increase in the average of characters.<br /> The results showed that the best sprayings occation was (four times) for most characters in comparison with (two sprayings).<br /> The interaction between concentration organic manure (1 gm /l) and concentration gibberellic acid (40 mg/l) effected significantly in characteristics.<br /> The effect of interaction No.2 between concentration organic manure (1 gm /l) and sprayings times (four sprayings) caused significant increase in the average of the characters.<br /> The effects of interaction with gibberellic acid (40 mg /l) and sprayings occation (four sprayings) effected significantly in all characters studiced.<br /> The results of triple interaction between (concentration organic manure and concentration gibberellic acid and sprayings occation) interaction (1gm /l organic manure, 40 mg / l gibberellic acid and four sprayings) was superior in increase of growth length, Stem diameter, increase of number of branches , Main root length , Main root diameter.