Philipwonel said:Im starting vege seedlings in house.
... Got ideal of using 1 Tbl. Peroxide in gallon of water to water seedlings. To prevent damping off and excess drain water from getting stagnated. Will it hurt seedlings over long period of time ? ...
One tablespoon per gallon might be 8 times weaker than you COULD use safely.
(I assume that you will start with 3% "drugstore" hydrogen peroxide, not the 35% "food service" peroxide. If you are starting with the super-strong food service peroxide, than maybe 1 TBLSP/gal is a little too strong.)
This website suggests 0.1% H2O2 for watering, misting or soaking seeds:
http://www.using-hydrogen-pero...
http://www.using-hydrogen-pero...
They suggest 1/2 cup of 3% peroxide per gallon (or 2 tsp of 35% per gallon).
I think it helps prevent damping off, but less-over-watering and a dry surface layer of bark chips also prevent damping off. Soaking seeds in 0.1% peroxide before sowing seems to speed germination, perhaps by shortening dormancy.
