You know, I didn't measure the H2O2. I just filled a small plastic cup with water (probably about 2 or 3 ounces), poured a bit of peroxide into the cap, and then poured a little of that into the cup (maybe about 1/4 tsp?). The one seed that sprouted was from the batch I scratched on sandpaper and put into that solution. I'm trying the same treatment on some of these new seeds; just planted them on Sunday, along with some that I didn't do anything to. Waiting not very patiently to see what happens.