Regulator for promoting rooting of watermelon and white-seed pumpkin double-root-cut grafted seedlings and rooting method

The invention discloses a conditioning agent for promoting rooting of watermelon and white-seed pumpkin double-root-cut grafted seedlings and a rooting method thereof, belongs to the technical field of plant growth regulators, and aims to solve the problem that the rooting rate of watermelon grafted seedlings still needs to be improved by the existing rooting conditioning agent. The rooting regulator is prepared from the following components: indazole, naphthylacetic acid and strong rooting powder; the indolebutyric acid and the naphthylacetic acid are soluble solutions with the concentration of 5%, the volume ratio of the naphthylacetic acid is 2.5%, and the volume ratio of the indolebutyric acid is 2.5%; the mass ratio of effective components in the strong rooting powder is greater than or equal to 5%; every 1000 ml of the rooting regulator comprises the following components: 10 ml of naphthylacetic acid and 10 g of strong rooting powder. The rooting method is convenient to operate, and the labor intensity