Making Homemade Preserves From Garden Gluts

Why a Glut Is Money in the Bank

There is a particular moment in late summer when the courgettes have turned into marrows, the runner beans are dangling faster than you can pick them, and the apple tree has gone into overdrive. It is easy to panic, give half of it away and watch the rest go mouldy in a bowl. That is money and effort quietly rotting on the windowsill.

A glut is one of the best chances a frugal household gets to build a store cupboard for almost nothing. A jar of homemade chutney costs somewhere between 30p and 60p in ingredients once you already have the fruit, against £2.50 or more for a decent supermarket version. A batch of ten jars is a saving, a set of Christmas presents and an excuse to knock on a neighbour's door, all from produce that would otherwise be compost.

Match the Produce to the Right Preserve

Half the battle is picking a recipe that suits what you actually have. Get that wrong and you will fight a jam that refuses to set or a pickle that goes soft and sad.

• High-pectin fruit: apples, blackcurrants, gooseberries, damsons, plums and quince set jam and jelly easily, so they are the forgiving choice. Mix them with low-pectin fruit to help it along.
• Low-pectin fruit: strawberries, raspberries, cherries and rhubarb need help. Add the juice of a lemon per kilo of fruit, or use preserving sugar with added pectin.
• Soft fruit in a hurry: if you have no time to cook, freeze berries in single layers on a tray first, then bag them. They will not clump and can become jam in January.
• Vegetable gluts: courgettes, marrows, green tomatoes, runner beans, onions and beetroot are made for chutney or piccalilli. Under-ripe tomatoes and windfall apples work beautifully together.
• Firm, crunchy veg: shallots, onions, beetroot, cauliflower and cucumber are the classic pickling candidates. Keep them whole or in big chunks so they stay crisp.

Sterilise Your Jars Properly

This is the step people skip, and it is the one that decides whether your preserves last a year or grow a fur coat in a fortnight. Mould needs two things: air and bugs. A properly sealed, properly clean jar shuts both out.

• Wash jars and lids in hot soapy water, rinse well, then stand them upside down on a clean tea towel to drain.
• Heat the oven to 140°C (120°C fan, gas mark 1). Stand the jars upright on a baking tray and dry them for 20 minutes. Lids can go in for the last 5 minutes if they are metal, but keep plastic-lined lids out of the heat.
• A hot dishwasher cycle works just as well if your machine has one. So does a microwave: half-fill each jar with water, heat until it boils, then tip the water out and stand the jar on a board.
• Fill the jars while they are still hot, using a ladle and a wide-necked funnel. A hot jar with hot preserve is far less likely to crack.
• Leave a centimetre of headspace, wipe the rim with a clean cloth dipped in hot water, and screw the lid on firmly.
• Use vinegar-proof lids for chutney and pickles, or line the lid with a disc of greaseproof paper. Plain metal lids corrode and ruin the taste.

Getting the Set and the Texture Right

Jam sets at 104–105°C, and a jam thermometer takes the guesswork out of it entirely. If you do not have one, chill a saucer in the freezer, drop a teaspoon of jam onto it, wait a minute, and push it with your finger. If it wrinkles, it is ready. If it slides, boil for another two minutes and test again.

Boil hard and stir only enough to stop it catching. Long slow simmering before the set drives off flavour and darkens the colour. Skim the scum from the top with a slotted spoon near the end for a clear jam.

Chutney is the opposite: it wants a long, gentle cook. Simmer until a wooden spoon drawn through the pan leaves a clear channel that fills in slowly. Remember it thickens considerably as it cools, so stop while it still looks slightly looser than you want. For vinegar, malt is the traditional choice for chutney, while white wine or cider vinegar gives a cleaner flavour to pickles. Brining vegetables first — around 50g of salt per litre of water for 24 hours, then rinsed and dried — draws out water and keeps pickles crunchy.

Label, Date and Store Sensibly

Write the label on the side of the jar rather than the lid, where it will not be knocked off or rubbed away. Include what it is and the month and year you made it. A strip of masking tape and a permanent marker is perfectly good; a pretty printed label is a nice touch for gifts.

Chutney is best left for four to six weeks before opening, which lets the vinegar mellow. Jam is ready straight away and keeps for about a year unopened. Pickles are usually ready in a fortnight and are best eaten within six to twelve months. Store everything somewhere cool, dark and dry — a cupboard, not a sunny windowsill, which fades colour and softens texture. Once opened, keep jars in the fridge.

Share the Wealth

The best thing about a glut is that it is never really yours alone. A jar of chutney is a cheap, genuinely welcome gift, and it opens doors. Offer a few to neighbours, especially anyone elderly or living alone, and you will often find yourself with a bag of plums, a box of eggs or a tray of seedlings in return.

Local bottle swaps, allotment societies, community fridges, school fetes and charity raffles all welcome good homemade preserves. Do check the rules before donating to a food bank, as many can only accept certain items. Even so, a table of labelled, dated jars at a church hall or village hall sale will sell out quickly and raise a few pounds for a good cause.

And if you have more than you can possibly eat, remember the freezer and the compost heap are both better endings than a bowl of mould. Next year, plant one less courgette. Probably.