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Apple
The apple is the largest and most predictable glut in a Baltic garden, and it is also the most versatile thing on this page: it stores, dries, freezes, juices, cans, ferments into cider and vinegar, and — because it is rich in pectin — it rescues the set of every low-pectin jam it is added to.
The season
Early varieties from August, keepers picked in late September and October. Only late-ripening varieties store; an August apple is for eating or for the pan.
Acidity decides the method
Apples are acid at roughly pH 3.3–4.0, comfortably below the 4.6 line, so every water-bath route is open to them.
This is a reference guide, not a recipe authority and not medical advice. The one organism the safety rules here are written against is Clostridium botulinum, and the one way to be protected against it is a tested recipe followed exactly — substitutions of the acid, the sugar or the salt are not cosmetic. Where the national food authority publishes advice for a specific food (Baltic fish, wild mushrooms), that advice outranks this page.
Method by method
| Method | Verdict | The note |
|---|---|---|
| Freezing | Good | Slices tossed with lemon or ascorbic acid, open-frozen. Or freeze cooked purée, which takes less space. |
| Drying | Best | Cored, sliced into rings, dipped against browning, dried at 57–63 °C until leathery. |
| Fermenting | Good | Into cider and then into cider vinegar — the oldest use for a bad-keeping apple crop. |
| Pickling in vinegar | OK | Spiced pickled apple exists and is good with pork. |
| Jam and sugar preserves | Best | High in pectin and acid: apple sets easily and is the traditional pectin donor for strawberry, rhubarb and bilberry jams. |
| Water-bath canning | Best | Sauce, slices, juice and compote all process safely without added acid. |
| Pressure canning | No | Unnecessary. Apple is high-acid and boiling water is enough. |
| Curing and salting | No | No tradition. |
| Smoking | Poor | Apple wood smokes other food; the fruit is not smoked. |
| Root cellaring | Best | Late keeper varieties only, unbruised, at 0–4 °C and 90–95 % humidity, stored away from vegetables. |
The classic preparation: Dried apple rings and cellared keepers
For rings: core the apples, slice them across into rings of five to seven millimetres, dip them briefly in water with lemon juice or ascorbic acid to stop them browning, and dry at 57–63 °C until leathery and pliable with no wet core. Condition for a week in a sealed jar. For the cellar: pick keepers by hand, never from the ground, handle them as if they were eggs, and store only perfect fruit at 0–4 °C in high humidity, ideally each apple wrapped in paper and in a single layer. Check the boxes monthly. And keep them away from every other crop — the ethylene an apple gives off is what turns stored carrots bitter and wakes potatoes and onions out of dormancy.
Preparation that matters
Sort ruthlessly. Windfalls and bruised fruit go straight to the pan or the juicer, because one rotting apple in a box takes the box with it. Late varieties keep and early ones do not, however good they taste in September. For jam-making, keep a few tart cooking apples aside as pectin donors: a low-pectin fruit like strawberry or rhubarb sets properly with a cooked apple in the pan and no commercial pectin at all.
What the preserve is worth
Most of an apple's fibre is in and just under the skin, so peeled products — clear juice above all — lose the part that matters most. Dried apple is concentrated: the water has left and the sugar has not, so a handful of rings is a great deal more sugar than a fresh apple. Apple sauce and juice lose vitamin C to heat; freezing raw slices keeps more of it. The pectin that makes apples so useful in jam is itself a soluble fibre.
The ways this goes wrong
- Storing apples with vegetables and then wondering why the carrots went bitter.
- Cellaring early varieties, which soften within weeks.
- Storing bruised or windfall fruit.
- Assuming dried apple is a light snack. It is dense sugar by weight.
Safety rules, temperatures, blanching times, headspace and the pH 4.6 line: USDA Complete Guide to Home Canning and the National Center for Home Food Preservation guidance (US Government / land-grant publications, public domain). Acidity classes: the FDA's published approximate-pH tables. Jam composition: Directive 2001/113/EC. Fish freezing before raw or lightly cured use: Regulation (EC) No 853/2004, Annex III. Checked 2026-09-06.
Sources for this food
Frequently asked questions
Which apples keep in a cellar?
Late-ripening keeper varieties, picked by hand and unbruised. Early summer apples do not keep no matter how they are stored. Two to six months at 0–4 °C in high humidity is the realistic range, depending entirely on the variety.
Do apples need lemon before drying or freezing?
They brown otherwise. A brief dip in water with lemon juice or ascorbic acid stops the enzymatic browning; it does nothing for safety, only for colour.
Can apple sauce be canned in a boiling-water bath?
Yes. Apples are high-acid, so sauce, slices, juice and compote are all boiling-water-canner products with no added acid required.
Related pages
All foods compared
The full table, season by season, with the classic preparation for each.
Nutrition figures
The published USDA row for this food, per 100 grams.
When to sow and harvest it
The sowing calendar entry for this crop in this climate.
How long it keeps fresh
Fridge, freezer and pantry days for this food before it is preserved.
From the garden to the log
TempoLife counts the berries you picked and the jam you ate from them, so the season's work shows up where it belongs.