Swiss plums, damsons (Zwetschgen) and nectarines hit their price floor from early August to mid-September, typically CHF 2–3 per kilo at Coop, Migros, Lidl and Aldi as domestic supply peaks. Buy them slightly firm, ripen them on the counter, and refrigerate only once ripe — that is how you land sweet fruit and stretch a crate for a week.
Timing matters more than usual with stone fruit because it spoils fast. Buy imported nectarines at CHF 5–6/kg in June and let half of them bruise, and you pay roughly three times what the same fruit costs ripe and local in August. Move your buying into the seasonal window, waste less, and CHF 15–25 a month stays in your pocket through late summer.
When are Swiss plums, damsons and nectarines in season?
Late summer is a handover. The Valais apricot season peaks in early July and is mostly gone by the first week of August, and as it fades the shelves fill with plums and damsons. Pflaumen — the round, juicy plums — run right through August. Zwetschgen, the smaller oval damsons that hold their shape when cooked, peak from mid-August into late September and are the classic Swiss baking fruit. Mirabelles, small and golden, get a short August window of their own.
Nectarines and peaches overlap the whole stretch, strongest from mid-July to the end of August. Most are imported even at peak, but that is also when import volumes are highest and prices lowest. The practical read: eat nectarines fresh now, use plums and Zwetschgen for both the fruit bowl and the oven, and stop paying July apricot prices in August once the apricots are past their best.
The stone-fruit rule of thumb: buy by smell, not colour. A ripe plum or nectarine gives off a sweet scent at the stem end and yields slightly to gentle pressure. Deep colour alone means little — much of it is bred in. Scentless and rock-hard means picked too soon, and it may never sweeten.
How do you pick stone fruit at the right ripeness?
Stone fruit is picked before it is ripe, so what sits on the shelf is a moving target. It softens and juices up after picking, but the sugar barely rises once the fruit is off the tree — which is why a rock-hard, scentless peach can stay sour forever. Read each type on its own terms, and lean on our stone-fruit buying guide for the finer points:
- Nectarines and peaches: buy firm with a little give at the stem and a clear scent; they ripen well over two to three days on the counter.
- Plums (Pflaumen): should feel heavy and springy rather than hard; a dusty bloom on the skin is a good sign, not dirt.
- Zwetschgen: choose deep-purple, slightly soft fruit for baking; firmer ones keep longer if you are buying ahead.
- Mirabelles: best fully golden and fragrant — they bruise easily, so buy only what you will use within days.
- Skip: anything green-shouldered, shrivelled at the stem or leaking, plus split-skin fruit that will mould fast.
How should you store stone fruit so it doesn't turn?
Storage is two stages, and the order is everything. Ripen at room temperature first, then chill to hold the fruit at its peak. The single most common mistake is putting unripe stone fruit straight in the fridge, where cold below ripeness turns the flesh dry and mealy — and no amount of counter time fixes it afterwards.
- Ripen on the counter: a single layer, stem-side down, out of direct sun, checked daily.
- Speed it up: a paper bag traps the fruit's own ethylene and shaves a day or two off ripening.
- Then refrigerate: once it smells sweet and gives to a gentle squeeze, the fridge buys ripe plums and damsons up to a week, nectarines three to five days.
- Wash late: only just before eating, since surface moisture speeds mould.
- Separate the soft ones: one bruised plum spreading mould can take a whole crate down with it.
What does late-summer stone fruit cost, and what keeps longest?
Swiss food prices sit about 61% above the EU average (Eurostat, 2024), so seasonal timing is one of the few levers that genuinely moves the fruit bill. In the August window, local plums and Zwetschgen are among the cheapest fruit in the shop by weight — one of the rare cases where Swiss-grown also means cheapest. Here is what to expect on Aktion, alongside how long each fruit lasts once ripe:
| Fruit | Peak weeks (CH) | Aktion price/kg | Keeps for (ripe) |
|---|---|---|---|
| Nectarines & peaches | Mid-July – end Aug | CHF 2.50–3.50 | 3–5 days |
| Apricots (Valais) | Early July – early Aug | CHF 3.00–5.00 | 2–4 days |
| Plums (Pflaumen) | August | CHF 2.00–3.00 | Up to 1 week |
| Damsons (Zwetschgen) | Mid-Aug – late Sept | CHF 2.00–3.00 | Up to 1 week |
| Mirabelles | August | CHF 3.00–4.00 | 3–5 days |
Origin drives the gap. Plums and Zwetschgen on the August shelf are frequently Swiss-grown, which is exactly when local fruit is cheapest rather than dearest. Nectarines and peaches lean imported (Spain, Italy, France) year-round; in season the imported price is low enough that holding out for a Swiss nectarine rarely pays. Buy the local fruit while it is local and cheap, and let imports cover the rest.
How do you turn a glut into savings, not waste?
Stone fruit is fragile, and fragile fruit is where household food waste hides. Swiss households bin roughly 119 kg of food per person each year — about 38% of the country's total, according to the Federal Office for the Environment (BAFU) — and fresh fruit is among the most-binned categories. A cheap crate that rots is no saving at all. Work a glut in order:
- Sort on arrival. Set aside the softest, ripest fruit to eat or cook within a day; leave the firmer pieces out to ripen.
- Ripen deliberately. Single layer, room temperature, out of the sun; a paper bag for the stubborn ones.
- Chill at the peak. The moment fruit smells ripe and gives slightly, move it to the fridge to stop the clock.
- Cook the casualties. Too soft to enjoy raw is perfect for compote, cake or chutney — heat rescues almost anything short of mould.
- Preserve the surplus. Halve, stone and freeze the fruit flat on a tray, then bag it; our guide to preserving summer produce covers freezing, canning and jam.
A simple late-summer benchmark: local Zwetschgen and plums under CHF 3/kg, nectarines under CHF 3.50/kg on Aktion. Above that, wait a week for the next promotion or check a second chain — at peak season one of them is almost always running stone fruit.
How much can smart stone-fruit buying save?
Take a household eating about 2 kg of stone fruit a week across the eight-week late-summer window:
- Out of season or on impulse at CHF 5/kg → about CHF 10 a week.
- Local plums and Zwetschgen on Aktion at CHF 2.50/kg → about CHF 5 a week.
- Price saving alone → ~CHF 5/week, or roughly CHF 40 across the window.
- Waste avoided → every crate you finish instead of binning is pure bonus on top.
Stack seasonal timing like this across every category and a family of four spending near CHF 1,200 a month on groceries can realistically claw back CHF 200–350 a month through planning, store choice and less waste. Watching each fruit's season by hand is the tedious part, and that is the job Eini's algorithm does: it tracks seasonal prices across Coop, Migros, Lidl, Aldi, Denner and Aligro, flags when local stone fruit hits its Aktion floor, and folds it into your meal plan and grocery list. Eini is free to download with an optional premium tier at CHF 1.00/week, and grocery and meal planning are what's live today — so you just buy at the right moment.
Frequently asked questions
When are Swiss plums in season?
Swiss plums (Pflaumen) run through August, while Zwetschgen (damsons) peak from mid-August into late September. The first weeks of August are when both hit their price floor at around CHF 2–3 per kilo, as domestic supply peaks across Coop, Migros, Lidl and Aldi.
How do I store stone fruit?
Ripen it at room temperature in a single layer, out of direct sun, until it smells sweet and gives slightly. Only then move it to the fridge, where ripe plums and damsons keep up to a week and nectarines three to five days. Refrigerating unripe fruit makes the flesh mealy.
Are nectarines cheaper local or imported?
In late summer, imported nectarines from Spain, Italy and France still dominate Swiss shelves and are usually the cheaper option at CHF 2.50–3.50 per kilo on Aktion. Swiss-grown plums and Zwetschgen, by contrast, are both local and cheap in August — the better-value seasonal buy.
What can I make with a plum glut?
Bake a Zwetschgenwähe or plum cake, simmer a compote, cook a spiced chutney, or halve and stone the fruit to freeze for winter. Cooking rescues fruit that has turned too soft to eat raw, so a bruised glut is never wasted.
Does Eini track fruit seasons?
Yes. Eini's algorithm follows seasonal produce prices across Coop, Migros, Lidl, Aldi, Denner and Aligro, flags when local stone fruit hits its Aktion floor and folds it into your meal plan and grocery list — so you buy at the cheapest, ripest moment.
Plan smarter, spend less with Eini.
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