i. Why we can, and what we're really saving
Canning is a technique as old as the Napoleonic era — Nicholas Appert figured out in 1810 that food sealed and heated in glass would keep, and French soldiers ate on it not long after (Wikidata: canning). My grandmother never said "Appert." She said "you put up what you can't bear to lose." Same discipline.
But the ledger asks the question the sentiment forgets: is it worth the jars and the gas and the afternoon? In Houston, the grocer sells stewed tomatoes at 88 cents a can on sale. My half-dozen put-up jars of my own romas cost me 47 cents a jar in lids alone after the first season's jars are free. When the salsa's from my own yard and the pepper relish would cost eight dollars a jar at the farmers' market, the column answers for itself.
"A jar is a promise you can see through." — what I tell the young women at the kitchen table
ii. The numbers that matter for zone 9, late August
These are the timings I live by. They are written for water-bath canning only — acid enough to be safe at sea level, with Houston's altitude (about 50 feet) never costing us extra minutes. My rule: if it isn't acid, it doesn't go in the water bath. Peppers and tomatoes and pickles, yes. Beans and squash and okra plain, no — those are pressure-cooker business, and I'll say that plainly so nobody hears me say otherwise.
| What | Processing | Boil time (pints) | Failures I've seen |
|---|---|---|---|
| Crushed tomatoes (with bottled lemon juice, 2 tbsp per qt) | Water bath | 35 min | Skimping on acid → flat jars with a sour sweetness — toss them |
| Tomato salsa (vinegar per recipe) | Water bath | 15 min | Undercooked onion in the middle — hot packing matters |
| Dill pickles (cucumbers, 5% vinegar brine) | Water bath | 10 min | Cloudy brine — hard water, or salt with iodine in it |
| Pepper relish (bell + hot, vinegar) | Water bath | 10 min | Foaming over — headspace too small, bubbles not chased out |
| Golden fig jam (sugar, lemon) | Water bath | 10 min | Weeping jars — didn't let it set before covering |
Every jar gets a half-inch headspace, a clean wiped rim, and a lid I never reuse. Ten minutes in the bath after the water returns to a full rolling boil; the clock starts on the boil, not when you drop the jars in. That's the mistake that turns a pantry into a science project.
iii. The brine, weighed not guessed
"Some vinegar" is how a reputation for bad pickles is made. Weigh it. For a crisp dill brine that keeps the crunch without puckering your face:
| Ingredient | Grams (per liter) | Why it's that number |
|---|---|---|
| Distilled white vinegar (5%) | 500 g | Half the volume — the acid floor |
| Water | 500 g | Other half — keeps the bite honest |
| Kosher salt (no iodine) | 35 g | 2.5 tablespoons — iodine clouds the brine |
| Sugar | 12 g | A teaspoon to balance, never to disguise |
| Mustard seed, dill, peppercorn | a scatter | Flavor isn't measured; courage is |
iv. What a jar is worth — your own cost-per-jar
Put your own numbers in. The ledger does the arithmetic and tells you whether this batch pays for itself or feeds the family because love, not profit, demanded it. Both are honest answers.
The Cost-Per-Jar Ledger
Add up what the batch cost you — produce, lids, vinegar, gas for the burner — and tell it how many jars you filled.
First season you pay for jars (about $1.30 each new buy) — after that the jars are free, and the column leans the other way.
The worked example in the boxes: my Saturday batch — a bushel of bruised-but-honest romas from the ends of the rows, a flat of sale lids, vinegar, and the burner's gas on a hot afternoon — ran me $9.40 for nine jars. That's $1.04 a jar, under a dollar once I stop counting the burner. Compare the grocer's 88-cent can of stewed tomato: I'd rather know exactly what's in mine.
Neighbor in the kitchen
In season, in the ground
- food preservation — inhibition of microbial growth in food
- preservation — set of activities aimed at prolonging the life of a record or object in the fields of museum, library and archive
- Preservation Act 2 — album by The Kinks
- Preservation Hall — jazz club in the French Quarter of New Orleans, Louisiana, US
A machine-readable twin of this ledger — the brine weights, the boil minutes, the per-jar math — lives at putting-up-august.json, so another maker's table can feed on my numbers.