<;P>;PROBLEM TO BE SOLVED: To provide a method for cultivating fruits without shipping delay caused by sunshine shortage. <;P>;SOLUTION: A covering material for citrus fruits is a material for covering citrus fruits and is made of a fabric which has an absorption peak of transmitted light curve of 400-530 nm or 570-700 nm, and an average transmissivity in 250-1,100 nm of &ge;80%. An average transmissivity in 280-400 nm of the material is preferably 40-90%. The covering material is covered on an individual fruit, a whole fruit tree or a greenhouse after fruits bear fruit so as to promote coloring of citrus fruits. <;P>;COPYRIGHT: (C)2008,JPO&INPIT