Sweet, Simple & Sustainable: Blueberry Jam with Harvest Guard Reusable Canning Lids

Sweet, Simple & Sustainable: Blueberry Jam with Harvest Guard Reusable Canning Lids

There’s something special about homemade jam—especially when it’s made with juicy, in-season blueberries and sealed up with reusable canning lids you can rely on. If you’re looking for a delicious way to preserve the harvest and skip the waste of single-use lids, this Blueberry Jam recipe is just the ticket.

Let’s get jamming!

Why We Love This Recipe

Not only is this blueberry jam sweet and spreadable, but it’s also preserved with Harvest Guard Reusable Canning Lids—a long-term investment for your pantry. No more throwing away metal lids every season. Our BPA-free, phthalate-free lids are made to be used again and again, whether you’re water bath canning, pressure canning, or fermenting.

Ingredients:

  • 8 cups fresh blueberries (about 4 lbs)

  • 6 cups granulated sugar

  • 1 packet (1.75 oz) powdered pectin

  • 1/4 cup bottled lemon juice

🍳 Step-by-Step Instructions:

1. Prepare Your Jars and Lids

Start by washing your jars, Harvest Guard lids, and rings thoroughly. Good news: our lids and gaskets are dishwasher safe!

Place clean jars in your water bath canner with hot water to keep them warm. Meanwhile, heat your Harvest Guard gaskets in a small pot of hot (not boiling) water—just about 180°F. Leave the plastic lids dry and set aside.

❌ Never boil the gaskets and avoid using bleach or oxidizing cleaners on your lids.

2. Cook the Jam

In a large stockpot, lightly mash your blueberries. Add lemon juice and pectin, stirring to combine.

Bring the mixture to a rolling boil, then add all the sugar at once. Stir constantly until the sugar dissolves. Return to a full boil and boil hard for 1 minute. Then, remove from heat and skim off any foam.

3. Fill & Seal

Using a funnel, ladle the hot jam into your warm jars, leaving 1/4-inch headspace.

Wipe jar rims clean. Add a pre-heated Harvest Guard gasket, followed by a plastic lid. Screw on a standard metal band fingertip tight only—not too tight!

⚠️ Overtightening can trap pressure inside the jar and affect your seal.

4. Process in Water Bath

Lower the jars into a boiling water bath. Make sure the water covers them by at least 1 inch. Process for 10 minutes (adjust for altitude as needed).

Turn off the heat and let jars rest in the canner for 5 minutes before carefully removing them.

⚠️ Don’t attempt to tighten the lids if they look domed—this means pressure is still inside. Let them cool naturally.

5. Cool & Check the Seal

Let the jars cool undisturbed for 12–24 hours at room temperature. Avoid placing them under air conditioning vents, which can interfere with proper sealing.

Once cool, remove the metal bands and gently lift the lid. A properly sealed jar will hold strong. If the lid pops off with little resistance, pop it in the fridge and enjoy soon, or reprocess it using USDA guidelines.

🌿 Good for You, Good for the Planet

Harvest Guard Reusable Canning Lids are built to last and safe for all your home preservation needs—water bath, pressure canning, steam canning, and even fermenting. Made in the USA from FDA- and USDA-approved materials, our lids are free from BPA, phthalates, and waste.

Store & Enjoy

Store your sealed jars in a cool, dark pantry. Once opened, your jam will stay fresh in the fridge for several weeks—perfect on biscuits, pancakes, or a good old PB&J.

Ready to start preserving more and tossing less? Give this jam recipe a try and experience the difference of canning with confidence.


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