ABSTRACT An experiment about the effect of organic fertilizer dose on growth and yield of onion (Allium ascalonicum L.), has been done since June 14 until August 18, 2003 in Keadungsari Village, North Magelang District, Magelang City. The altitude is 350 m, soil kind is latosol and pH 6,5. The method of experiment is non-factorial with completely randomized block design and …