Canning Season Prep Checklist: 7 Things to Check Before the Tomatoes Come In
Canning season has a cruel sense of humor. The tomatoes, the pickles, and the peaches all come in at once, usually in August, and that is EXACTLY when the gear you need is hardest to find. So here is the short version, up front: test your pressure canner (especially the gauge), inspect every jar rim, buy your lids now, round up the small tools, pull your recipes from USDA-tested sources, and clear shelf space before the first batch, not after. Do those seven things in July and your busiest canning weekend runs like a well-oiled jar lifter.
We sell canning gear year-round at Kooi Housewares, and every summer the same story plays out: somebody's gauge reads wrong, or the lids ran out mid-batch, or the canner they wanted sold out three weeks earlier. Every one of those problems is preventable in July. Here's the checklist.
| The check | What you're looking for | When to handle it |
|---|---|---|
| 1. Pressure canner | Gauge accuracy, vent pipe clear, seal in good shape | Now, gauge testing takes time |
| 2. Jars | Chips and cracks, especially on the rim | Now, while replacements are in stock |
| 3. Lids | New flat lids for every jar you plan to fill | Now, do the math below |
| 4. Small tools | Jar lifter, funnel, bubble popper, lid wand | Before the first batch |
| 5. Recipes | USDA or NCHFP tested, with processing times | Before you plant... but July works |
| 6. Pantry space | Empty, wiped shelves with oldest jars up front | A rainy afternoon in July |
| 7. The calendar | Anything big you still need to buy | Canners sell out by August. Truly. |
Check the pressure canner FIRST: the gauge decides whether your green beans are safe
A dial gauge that reads high under-processes your food. That is the one failure on this list with real consequences, because low-acid foods like green beans, corn, and meat depend on the canner actually hitting the pressure the recipe calls for. Extension services recommend having dial gauges tested for accuracy every year, and the rule of thumb is simple: off by more than 2 pounds, replace it. Many county Extension offices test gauges for free (a quick call tells you if yours does).
While the lid is off, look down the vent pipe and make sure it's clear, and check the overpressure plug for cracks. If your canner seals with a rubber gasket, flex it: brittle, sticky, or cracked means replace. If you run an All American, there is no gasket to fail - the metal-to-metal seal is the whole point of the design, and it's been made the same way in American foundries since 1930. The clamp bolts and the gauge are what deserve your attention. We keep a tested replacement steam gauge ($26.49) and overpressure plugs ($5.49) in stock, and each gauge is checked before it ships.
Related reading:
All American 921 vs 930 vs 941: which size pressure canner you actually need →
Shopping for a canner this season? This comparison walks through capacity, weight, and which size fits your stove and your batch habits.
Inspect your canning jars: run a finger around EVERY rim
Jars are the reusable part of canning, and a good jar lasts decades. But ONE chip on the sealing rim means that jar will not seal, no matter how new the lid is. So pull your jars out of storage, hold each one up to the light, and run a finger around the rim feeling for nicks. Anything chipped or cracked gets demoted to dry-goods duty (flour, buttons, bacon grease... jars never really retire, they just change careers).
Count what survives and match it against what you plan to put up. If you're short, our Superb regular mouth quart jars come 12 to a box with lids and bands included ($30.97), made in the USA by Arglass glassworks.
Canning lid math: why you never have enough lids in September
Jars are forever. Flat lids are single-use. The sealing compound is engineered to compress once, which is why the USDA says a new flat lid for every jar, every time (bands are reusable until they rust). That means lids are the one supply you have to re-buy every single season, and the one that grocery stores run out of first when canning season peaks.
So do the math now, in July: add up every jar you realistically plan to fill, then add 20 percent for do-overs, second batches, and the neighbor who shows up with a bushel of cucumbers. If that number made you wince, feeling a bit Dutch about it is the correct response, and buying in bulk is the fix. Our Superb regular mouth lids start at $4.97 for a dozen, and the Baker's Dozen sleeve packs 156 lids for $41.97, which works out to about 27 cents a lid. Buy once in July, can all the way through October.
And here's the story behind those lids, because it's a good one. Superb Sealing Solutions is the Miller family of Sugarcreek, Ohio, precision metal manufacturers in Amish Country who spent decades making custom metal components. When the 2021 supply chain mess left their Amish neighbors unable to find quality canning lids, the Millers looked at their own equipment (stamping, coatings, gaskets, tight tolerances) and realized they already knew how to make a better lid. So they did, patent and all. We've known John Miller for years, and this is exactly the kind of maker Kooi Housewares exists to carry.
Shop Superb canning lids and jars →
Regular and wide mouth lids, lid-and-band sets, bulk Baker's Dozen sleeves, and USA-made jars. Current stock shows on each product page.
The small tools that save your knuckles (and your countertops)
Nobody ever regrets owning a jar lifter. People DO regret fishing a quart jar out of boiling water with regular tongs and a prayer. The small-tool lineup is stupidly simple and mostly under ten bucks apiece:
- Jar lifter ($7.99) - grips hot jars around the neck so they come out of the canner level, not sideways.
- Canning funnel ($16.49) - the difference between filling jars and filling the counter around the jars. Ours is the stainless version.
- Bubble popper ($2.99) - slides down the jar wall to release trapped air and doubles as a headspace gauge, so your seals actually seal.
- Magnetic lid wand ($2.99) - lifts lids out of hot water without your fingerprints joining the batch.
- Jar labels ($1.99 to $2.99) - because "mystery red jar, probably 2024?" is not a labeling system.
If you're starting from zero, the Norpro canning set bundles six of the essentials for $23.99, which is the tidiest way to check this whole section off at once.
Shop canning tools and accessories →
Jar lifters, funnels, racks, labels, and the rest of the small-tool lineup, with live stock status on every page.
Recipes and processing times: only tested sources make the cut
Canning is one of the few corners of the kitchen where winging it is genuinely off the table. Processing times and pressures come from lab testing, not from a blogger's best guess, so your recipes should come from the USDA Complete Guide, the National Center for Home Food Preservation, or your state Extension service. July is the right time to print them, sleeve them, and clip them somewhere splash-proof.
If you run an All American canner, their 44-page instruction manual and recipe booklet ($7.99) covers operation, maintenance, and recipes for every model from the 910 to the 941. Cheap insurance for a canner that will outlive all of us.
Pantry space: where are 80 quarts going to live?
The batch you can in August needs a home in September, and a full canning season produces more jars than most people expect. Clear the shelves now: wipe them down, move last year's survivors to the front so they get eaten first, and actually measure what's left. A little tip while you're in there: before you buy any storage lids for open jars, check the lids you already own. A surprising number of them are standard sizes, and sometimes one you have fits perfectly.
If your jars live in a basement or garage, stackable quart-jar storage boxes from JAK Industrial (from $39.97) keep full jars from playing dominoes every time someone bumps the shelf.
The calendar check: canners sell out by August (ours already did)
Here's the honest part of the checklist. Pressure canners disappear from shelves everywhere by late summer, every single year, because everybody decides they need one the same week the tomatoes turn. We're writing this in mid-July and every All American canner size we stock is already sold out, which tells you everything about how this works. It is not a sales tactic; it's the annual pattern, and the fix is boring: buy the big equipment in spring or early summer, and check product pages for restock timing rather than waiting for August.
The good news: everything else on this checklist (lids, jars, tools, gauges, recipes, shelf space) is fully handleable RIGHT now. A canning season that starts prepared is a canning season you actually enjoy.
FAQ: the questions we answer at the counter every week
When should I start getting ready for canning season?
June or early July. Big equipment like pressure canners sells out by August, gauge testing takes time to schedule, and lids get scarce right when tomatoes peak. Everything on this checklist can be done in one July weekend.
Do I need new canning lids every year?
Yes, for the flat lids. The sealing compound is designed to compress once, so the USDA recommends a new flat lid for every jar, every time. The screw bands are reusable for years, until they rust or bend.
How often should a pressure canner dial gauge be tested?
Once a year, before the season starts. Many county Extension offices test dial gauges free of charge. If a gauge reads more than 2 pounds off, replace it. Weighted gauges never need calibration, but check that vents are clear and the weight is undamaged.
Can I reuse canning jars?
Yes, indefinitely, as long as the rim is free of chips and cracks. Check every rim by touch before the season starts. A chipped jar will not seal reliably and should be retired to dry storage instead.
Get canning-season ready in one order
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Lids, jars, tools, replacement parts, and fermentation gear, all in one place, with current availability shown on each product.
