It is one of the treatments for prolonging the cut flowers in Japanese flower arrangement or in fresh flower business, which is a technique to keep plants in a tall bucket without sinking the head of flowers in order to pour the water into the stem by the water pressure.
生け花や、生花を扱う業種で、切花が長持ちするようにする処理方法の一つで、植物を深いバケツなどに花首だけを出して沈め、水圧によって水を茎の中に押し込む技法。