Seaweed for root growth

[Cranly]

Hi all,
I was hoping someone could help explain to me the seaweed method for roots growth a bit more. I'm a bit unclear on it.

I have around my house some seaweed for my own consumption - i have both nori (flat sheets of it) and wakame (just dried seaweed leaves).
Are either of those acceptable?

Do I chop up the seaweed and put it in some water? Wrap the leaves around the plant roots? What's kind of the process or ratio of seaweed here?

thanks for helping out a newb.