What to Preserve, and How
When the garden floods you with more than you can eat, the question is not whether to preserve but which method suits what you have. Match the crop to the right technique and you lock in the harvest at its best with the least waste.
Match the method to the crop
High-acid fruit and tomatoes bottle and turn to jam beautifully. Leafy greens, beans, peas and sweetcorn freeze best after a quick blanch. Herbs, chillies and surplus fruit dry well. Cabbage, cucumbers and other vegetables shine when fermented or pickled. Eggs, in a backyard glut, keep for weeks with the right storage.
- Freeze: beans, peas, sweetcorn, blanched greens, berries, stewed fruit. See freezing
- Bottle and jam: stone fruit, apples, tomatoes, berries. See bottling and jam
- Dry: herbs, chillies, apples, tomatoes, mushrooms. See dehydrating
- Ferment and pickle: cabbage, cucumbers, beans, surplus veg. See fermenting
- Store fresh: pumpkins, onions, garlic, potatoes, and eggs
The safety line that matters
One rule underpins all home bottling: only high-acid foods such as fruit, tomatoes with added acid, jams and pickles are safe to preserve by water-bath bottling. Low-acid foods like plain vegetables, beans and any meat are not safe to bottle at home without a pressure canner, because of the risk of botulism. When in doubt with a low-acid crop, freeze it instead.
Start with the simplest
If you are new to it, freezing is the most forgiving place to begin, and drying is close behind. Bottling and fermenting reward a little reading first. Most New Zealand gardeners end up running a mix, freezing the summer beans, bottling the stone fruit, drying the herbs and fermenting the autumn cabbage.
Frequently Asked Questions
What is the easiest way to preserve a garden glut?
Freezing. Most vegetables freeze well after a quick blanch, and berries and stewed fruit freeze with almost no preparation. It is the most forgiving method and a good place to start before trying bottling or fermenting.
Is it safe to bottle vegetables at home?
Only high-acid foods like fruit, jam, pickles and acidified tomatoes are safe to preserve by water-bath bottling. Plain low-acid vegetables and meat need a pressure canner to be safe, so freeze them instead if you do not have one.
Which preserving method keeps the most nutrients?
Freezing and drying generally retain nutrients well, and quick blanching before freezing helps lock them in. Long boiling for bottling costs a little more, but the trade-off is shelf-stable food that needs no power.