Valid "home brewed" root horomone alternatives?

[alecStewart1]

So this has come from me looking around the internet at what bloggers, orchid growers and other amateur horticulturists say they do with their plants. (The word "say" I think have some weight depending on where you look.) Given I would say there's quite a few of you here who aren't amateur, I'd thought I'd ask.

When repotting an orchid, or really almost any plant, are the following valid alternatives to purchasing a rooting horomone?

• Cinnamon
• Aloe Vera pulp/juice
• Crushed up aspirin

And, if all are valid, when repotting an orchid, which of those three are you choosing to use?

As a note, the only thing I've ever done with any plant is set the roots of a Cephalotus and a Nepenthes in a small glass of diluted SuperThrive while I got their new pots ready for them. After they're repotted, I bagged them to artificially raise the humidity around them to help recovery from the stress of their roots being messed with.