If you use rooting gel, sumo boost, superthrive tiu are already using parts a lot of products have auxin, cytokinin, triacontol...
Most people use them whole goibgbon about cancer etc... shop tricks don't believe anything these days pal.
All depends on what the goal is. But the general opinion is that it should not be used.
The quality of the final product will be much better without it.
The informed consumer prefers.
The opposite opinion comes from a person who wants to make a profit. The consumer doesn't matter as long as it increases profit.👎