Thanks, Michelle.
It's hard to say how this might apply to rooting cuttings. Some of us with all of the materials might try a new experiment. My own experience has proven to me the value of coir over other media. However, I am willing to stand corrected and particularly interested in finding media that is better for rooting cuttings and cheaper, like one member's use of pine bark fines (sp?). Certainly, this study seems fairly conclusive about growing many plants from seed. Nevertheless, I find it interesting that the cut-rose industry uses coir as their growing medium of choice.
Steve.