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You process peaches when canning them for **25 minutes** in a boiling water bath for pint jars and **30 minutes** for quart jars, assuming you’re using the hot pack method and proper pressure canning isn’t required for your altitude.
If you’re wondering how long to process peaches when canning, the answer also depends on whether you’re working with halves, slices, or whole peaches.
Simple answer: most water bath canning recipes for peaches call for 20-30 minutes depending on jar size and your elevation.
But there’s more to it than just tossing jars in boiling water and hoping for the best.
The devil is in the details, and getting those details right means the difference between shelf-stable peaches and a batch of spoiled jars.
In this post, we’ll cover exactly how long you should process peaches when canning, what factors affect that timing, and how to make sure your peaches stay safe and delicious for months.
Let’s get into it.
How Long Do You Process Peaches When Canning?
When you process peaches when canning, the exact time varies based on a few key factors.
Here’s what you need to know.
1. Water Bath Canning Times for Peaches
If you’re using a water bath canner, which is the most common method for peaches because of their natural acidity, here are the standard processing times.
For **pint jars**: process peaches for **20 to 25 minutes**.
For **quart jars**: process peaches for **25 to 30 minutes**.
These times start counting once the water reaches a full rolling boil.
And yes, you need to make sure the jars are fully submerged with at least an inch of water covering the lids.
2. Hot Pack vs. Raw Pack
How you pack your peaches also affects processing time.
With a **hot pack**, you simmer the peach slices in syrup or juice before packing them into jars.
With a **raw pack**, you place raw peach slices directly into jars and cover them with hot syrup.
Raw pack peaches typically need a few extra minutes of processing to ensure the fruit is properly heated through the jar.
So if you raw pack, add about 5 minutes to the times above.
3. Altitude Adjustments
Here’s something a lot of people forget.
If you live above 1,000 feet in elevation, you need to add processing time when you can peaches.
Water boils at a lower temperature at higher altitudes, which means your jars aren’t getting as hot as they need to be.
Add **5 minutes** for every 1,000 feet above sea level.
So if you’re at 3,000 feet, add 15 minutes to your total processing time.
Factors That Affect How Long You Process Peaches When Canning
Beyond jar size and altitude, several other factors influence how long you process peaches when canning.
Getting these right ensures your peaches are safe and delicious.
1. Acidity Level of the Peaches
Peaches are naturally high in acid, which is why water bath canning works for them.
But if you’re adding other ingredients like herbs or low-acid fruits, the acidity level changes.
Stick to tested recipes that maintain proper acidity levels.
Otherwise, you might need to use a pressure canner instead, which changes the processing time entirely.
2. Jar Size and Shape
We already mentioned pint and quart jars, but what about half-pints?
Half-pint jars of peaches process in about **15 to 20 minutes**.
The smaller the jar, the faster the heat penetrates to the center.
And always use jars designed for canning, not recycled mayo jars or decorative jars.
They can crack under pressure or fail to seal properly.
3. Type of Syrup or Liquid Used
The liquid you pack your peaches in doesn’t drastically change processing time, but it does affect flavor and texture.
You can use water, light syrup, medium syrup, or heavy syrup.
Heavier syrups help peaches hold their shape better during processing.
And they also add sweetness that balances the natural tartness of the fruit.
Just make sure the liquid is hot when you pour it over the peaches.
Step-by-Step: How to Process Peaches When Canning
Now that you know how long to process peaches when canning, here’s a quick rundown of the process itself.
1. Prep Your Peaches
Start by washing your peaches thoroughly.
Then blanch them in boiling water for 30-60 seconds, followed by an ice bath.
This makes the skins slip off easily.
Slice them in half, remove the pits, and cut them into slices or leave them as halves.
2. Pack the Jars
Pack your peach slices or halves into clean, hot jars.
Leave about ½ inch of headspace at the top.
Pour hot syrup over the peaches, making sure they’re fully covered.
Use a bubble popper or plastic spatula to remove air bubbles.
Wipe the rims, place the lids on, and screw the bands on until fingertip-tight.
3. Process in a Water Bath Canner
Place jars in your water bath canner and make sure they’re covered by at least an inch of water.
Bring the water to a rolling boil.
Once boiling, start your timer based on the times we discussed earlier.
When the time is up, turn off the heat and let the jars sit in the canner for 5 minutes before removing them.
4. Cool and Check Seals
Remove jars with a jar lifter and place them on a towel or cooling rack.
Let them cool undisturbed for 12-24 hours.
You’ll hear that satisfying “pop” sound as the lids seal.
To check the seal, press the center of the lid.
If it doesn’t flex, it’s sealed.
So, How Long Do You Process Peaches When Canning?
You process peaches when canning for about 20 to 30 minutes in a boiling water bath.
Pints take 20-25 minutes, and quarts take 25-30 minutes.
Add 5 minutes per 1,000 feet of elevation above sea level.
And if you’re raw packing instead of hot packing, tack on a few extra minutes.
The key is to follow tested recipes and never guess when it comes to canning times.
When you process peaches when canning with the right timing and technique, you’ll have jars of sweet, summer peaches ready to enjoy all year long.