Pre-season · Ontario canning starts in June

What to restock before the season

Home canning has one genuine recurring cost, and it is lids. Everything else is a check rather than a purchase. Here is the whole list, in the order worth doing it.

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Buy every year, without exception

HealthLink BC: “Do not re-use the lids. A perfect fit can no longer be guaranteed after a lid has been pried off once.” This is the only part of a jar that is genuinely single-use, and it is the entire recurring cost of home canning.

  • Bernardin SNAP lids, regular mouth (70 mm)

    The only canning part that is single-use — the sealing compound bonds once. Jars and bands last years; lids are what you run out of mid-batch.

    Check price on Amazon.ca →

Buy when you run out — these get used up

Consumables, not equipment. Worth buying before the season rather than mid-batch, because running out of pectin with fruit already macerating is how a batch gets improvised — and improvising is where the recipe stops being tested.

  • Pomona’s Universal Pectin (1 oz box)

    The low-sugar option from the comparison above — calcium-activated, so it sets with honey, maple or no sweetener at all. Its recipes are its own, not Bernardin’s. Worth ordering because it is the one pectin here most Canadian supermarkets do not stock.

    Check price on Amazon.ca →

  • Bernardin Pickle Crisp (calcium chloride)

    Firms up pickles that would otherwise go soft in the jar. It is a texture ingredient only — it changes nothing about the acid that keeps the jar safe.

    Check price on Amazon.ca →

Check before the season — replace only if it fails

These are the annual jobs with a real consequence. Two of them come straight from HealthLink BC’s home canning guidance, and neither is a purchase unless the check fails.

  • Your pressure canner’s gauge

    HealthLink BC: “Both weighted gauges and dial gauges should be checked for accuracy. Read the manufacturer’s directions carefully for recommended testing and frequency procedures.” A dial gauge reading high means you are under-processing low-acid food and cannot tell.

  • The canner lid gasket

    HealthLink BC: “Ensure the rubber seal on the canner lid is not broken or cracked. Replace if necessary.” Perished rubber is why a canner will not come up to pressure, and it hardens on the shelf whether you used it or not.

  • Every jar rim, with a fingertip

    HealthLink BC: jars “can be used many times, as long as the rims are perfectly smooth and there are no scratches or cracks that would prevent a seal.” A nick you can feel is a jar to retire from canning — not a jar to throw away.

  • Bands, for rust and bending

    A band holds the lid down during processing and does nothing afterwards, so a rusty one is a band to replace rather than a reason to doubt the food. Rust is also a message about where you are storing jars: it means the spot is damp.

Do not rebuy these

The half of this page that saves you money. Jars, bands, canners and tools are bought once and kept for years — which is exactly why the recurring cost of home canning is so low, and why a shop shelf full of “canning supplies” every August is mostly aimed at people who do not know that yet.

  • Jars

    Many times over, if the rim is smooth. Buy more only when you want more jars in circulation, never as replacements.

  • Bands

    Indefinitely, until one rusts or bends. They are not part of the seal.

  • The canner itself

    Decades. A pressure canner is a gasket and a gauge attached to a pot that outlives both — service the parts, not the canner.

  • Jar lifter, funnel, headspace tool

    Effectively forever. Nothing about them wears out in a home kitchen.

Why the recurring cost is so low

A jar you bought in 2019 is still a jar. HealthLink BC puts it plainly: jars “can be used many times, as long as the rims are perfectly smooth and there are no scratches or cracks that would prevent a seal.” The lid is the part that is finished after one use, and a box of them is the only thing a canning season strictly requires you to buy.

That is worth knowing in August, when a shelf of “canning supplies” appears in every hardware store. Most of it is aimed at people who have not been told which half of it lasts.

The arithmetic of whether any of this saves money is its own post, with real numbers in it.

Source for the check items: HealthLink BC — Home canning: How to avoid botulism, File #22.

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