I'm late (nice vacation on Mount Shasta!) but here are my suggested numbers for future reference. I'm just going by other people's suggestions, and the triple-strength suggested above may be fine even for overnight soaks.
>> I'm going to soak a few more, adding peroxide. How much peroxide would you add to just a little medicine cup (about the size of a shot glass)?
Starting with 3% drug store peroxide, one source suggests diluting another 30:1, for a final seed-soak concentration of 0.1%.
http://www.using-hydrogen-pero...
dilute 1/5th teaspoon up to one ounce (one milliliter is 1/5th teaspoon)
or
dilute 1/4 teaspoon up to 8 teaspoons = 1 ounce plus 2 teaspoons.
or
dilute one tablespoon up to one pint (water potted plants with the rest)
Carolyn suggests three times as strong, so dilute 3 milliliters (3/5 tsp) up to one ounce.
