Because 3,3'-Diindolylmethane is easy to degrade in vivo and in vitro, it has not become a common commodity. In the early stage, it was used to induce Parthenocarpy and fruit setting of tomato. In the flowering stage, the Indole-3-Methanol was soaked in 3000 mg / L solution to form seedless tomato fruit and improve the fruit setting rate. It was one of the earliest applications to promote the rooting of 3-Indolylcarbinol. Soaking the base of cuttings with 100-1000 mg / L solution can promote the formation of adventitious roots of tea, gum, oak, metasequoia, pepper and other crops, and accelerate the speed of vegetative propagation. The mixture of 1-10mg / L indoleacetic acid and 10mg / L oxamyl can promote the rooting of rice seedling. Spraying chrysanthemum once with 25-400mg / L solution (Indole-3-Carbinol) can inhibit the emergence of flower buds and delay flowering. The growth of crabapple under long sunshine can increase the female flower by spraying once at the concentration of 10-5 times of mole / L. Treatment of sugarbeet seed can promote germination, increase root yield and sugar content.