I expect peroxide to kill most life, including your vegetable. It's brutal.
Are you sure peroxide brings some benefit, or is this just one crook more, possibly with such a dilution that no disaster happens, that is no effect at all?
IF you get 30% peroxide somewhere, remember it's seriously dangerous at this concentration. Nothing to put on your skin! On a plant neither. It decomposes quickly upon contact with about anything.
Above some 70% it can detonate, light spontaneously many materials like gloves or clothes...