First of all, you need to put 0. 1% salt in the bottle, and then mix it with water evenly, which can play an antiseptic role. Secondly, before inserting the bottle, the stem bottom of the multi-headed rose should be treated, cut 5 to 10 cm, and cut into inclined planes. Finally, after the flowers are inserted into the water, the water should be changed every one or two days and kept in a well-lit place.