Rooting powder should never be used on seeds. With regard to germination, auxins (active ingredient in rooting powder) are usually associated with the inhibition of seed germination. While there always seems to be exceptions in the literature with regard to plant phytohormones, I can't think of one in this case. The only conceivable situation where a benefit of rooting powder on seed gemination might be noticed is when using very old rooting powder containing a fungicide and the auxin has already oxidized, rendering it biologically inactive. I guess the fungicide in the rooting powder (if there is one) could be of some help in this case assuming it didn't also inhibit germination, but I wouldn't waste the time or resources to find out. With regard to using hydrogen peroxide on seeds, I recommend doing your homework first (google it). While 3% may work great with many species, this concentration can also kill seeds of other species. Besides being beneficial to seed germination as a fungicide, hydrogen peroxide also improves seed germination by physiologically altering the dormancy states of seeds of many species. One practical example is its use to improve the germination rates of old seeds of some species. There is probably a lot of literature on these topics available online. Nathan