There are two common possibilities, one is to buy fake drugs (there are many fake brassins on the market now, in order to avoid being deceived, you must go to the regular agricultural stores to buy big brands), and the other is to use brassinin as a foliar fertilizer, without adding nutrients to apply together.
As we all know, whether it is foliar fertilizer or any other fertilizer, it is called "fertilizer", and the most basic condition is that it can provide nutrients for crop growth. Pure brassin, on the other hand, is only a plant growth regulator, which can play a good role in regulating plant growth, but cannot directly provide nutrients such as nitrogen, phosphorus and potassium.
It's like cooking on a stove, you can't cook it without firewood just by fire. Unless there are special circumstances, brassinin must be used together with other medicinal fertilizers to give full play to the effect. Of course, a blended product like Kenta 990 (New Chaoyang 14-Hydroxybrassinsterol + Gibberellic Acid), in which the ingredients have been scientifically formulated, can not only synergize synergistically, but also significantly reduce the risk of gibberellic acid, saving trouble and efficiency, and is more recommended for ordinary farmers.