Your Cool Home is supported by its readers. Please assume all links are affiliate links. If you purchase something from one of our links, we make a small commission from Amazon. Thank you!
You can preserve squash in jars by canning it with a pressure canner, which keeps it safe and shelf-stable for months.
If you’ve been wondering how to preserve squash in jars without losing flavor or texture, you’re in the right place.
Squash is a low-acid vegetable, so it needs special care when you preserve squash in jars.
In this post, we’ll walk through the best ways to preserve squash in jars, from choosing the right squash to sealing the perfect jar.
Let’s dive in.
Why You Should Preserve Squash in Jars
Learning how to preserve squash in jars is one of the smartest ways to enjoy your garden harvest all year long.
When you preserve squash in jars, you lock in the flavor and nutrients at their peak.
It also saves money because you’re not buying out-of-season squash at the store.
And there’s something deeply satisfying about seeing rows of home-canned squash on your pantry shelf.
You get to control exactly what goes into each jar, no mystery additives or preservatives.
Plus, when you preserve squash in jars properly, that squash can last up to 18 months or longer.
How to Preserve Squash in Jars Step by Step
Here’s the classic method for how to preserve squash in jars using a pressure canner.
This is the only safe way to can low-acid vegetables like squash at home.
1. Choose the Right Squash
Start with firm, mature squash that’s free of bruises or soft spots.
Winter varieties like butternut, acorn, and Hubbard work best when you preserve squash in jars.
Avoid any squash that’s already mushy or has mold on it.
2. Wash, Peel, and Cube
Wash your squash thoroughly under running water.
Peel it, remove the seeds, and cut the flesh into uniform one-inch cubes.
Uniform pieces help the squash heat evenly when you preserve squash in jars.
3. Precook the Squash
Boil the cubed squash in water for about two minutes.
This step helps the squash pack more tightly into the jars.
Then fill your clean, hot jars with the cubes, leaving one inch of headspace.
Pour boiling water over the squash, still keeping that one-inch headspace.
Remove air bubbles with a plastic spatula, wipe the rims, and add your lids.
4. Process in a Pressure Canner
This is the crucial part when you preserve squash in jars safely.
Process pint jars at 11 PSI for 55 minutes, and quart jars for 90 minutes.
Adjust for altitude if you live higher than 2,000 feet.
Never use a water bath canner for squash, because it won’t reach the temperature needed to kill botulism spores.
Other Ways to Preserve Squash in Jars
Canning isn’t the only way to preserve squash in jars.
You can also freeze squash and store it in jars, though these jars live in the freezer, not the pantry.
For this method, blanch cubed squash for three minutes, cool it in ice water, and pack it into freezer-safe jars.
Leave headspace for expansion, and the squash will keep for up to a year.
You can also preserve squash in jars as pickles or relishes if you prefer a tangy twist.
Just remember that adding enough acid, like vinegar, changes the safety rules.
When you preserve squash in jars with vinegar, you can often use a water bath canner.
And for something sweet, try making squash butter and canning it in small jars.
Tips for Safely Preserving Squash in Jars
Always use tested recipes from sources like the USDA or Ball Canning when you preserve squash in jars.
Don’t invent your own processing times, because that’s how people get sick.
Check your jar seals after 24 hours by pressing the center of each lid.
If a lid flexes up and down, it didn’t seal, so refrigerate that jar and use it within a few days.
Store your sealed jars in a cool, dark place, and label them with the date.
If you notice any off smells, discoloration, or leaking when you open a jar, throw it out.
Never taste food from a jar that looks suspicious, because that’s a risk not worth taking when you preserve squash in jars.
So, How to Preserve Squash in Jars?
You can preserve squash in jars by pressure canning cubed squash for 55 to 90 minutes, depending on jar size.
It takes some patience, but the reward is a pantry full of homegrown goodness.
Whether you choose canning, freezing, or pickling, the key is following safe, tested methods when you preserve squash in jars.
So grab your squash, fire up that pressure canner, and start filling those jars today.