Give the seeds a thorough washing to remove any pulp residue. You will be washing the hard outer shell, not the almond like pit within.
Diluted bleach and water is helpful in reducing the chance of fungus and other contaminants. Bleach is perfectly safe in small amounts and without added detergents. Dilution ratio is roughly 6 parts water to 1 part bleach which works out to about 3 cups of bleach per gallon of water. The small amount of bleach will destroy most contaminants without harming the peach pit.
Soak the peach pit[s] for 30 to 45 minutes before initiating the stratification process. DO NOT SOAK THEM IN THE BLEACH WATER, that was only for cleaning the seeds. Tap water will suffice.
Wrap the seeds in a moist paper towel, peat moss is better if you have it as it has anti-fungal properties, but a paper towel will suffice. Place the peat or towel with the seed[s] in a zip lock bag or even a seal-able Tupperware and leave it in the fridge for up to 2 months. Don't place it the freezer, that's simply too cold, just the refrigerator. Temperatures hovering above freezing but no warmer than 45 F are best. A higher success rate has been reported by some people by removing the hard outer shell from the actual almond like seed that it contains prior to the cold treatment. If you plan to do this do not use the bleach treatment described above. Also be aware that removing the hard outer stone increases the chances of fungal issues as well as the added risk of damaging the seed .
A high percentage of peach pits will never germinate so it is advisable to stratify several. On rare occasions the peach pit will germinate in the fridge, I've never experienced this, but have heard of it occurring so you you will want to check them periodically.
Peach seeds should be sown in the fall if planting directly into garden soil. They can also be started indoors in pots at any time and transplanted outdoors at an opportune time. If you start them indoors it is advisable to harden them off gradually before planting them outdoors.
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