Reading the signs: when your garlic is ready

Garlic is one of those crops that rewards patience, but not too much of it. Leave the bulbs in the ground a fortnight too long and the skins split, the cloves separate and the whole lot keeps for weeks rather than months. Lift them too early and you will be storing small, soft bulbs that shrink in the cupboard.

Luckily, the plants give you a clear countdown. In most UK gardens, autumn-planted garlic is ready somewhere between late June and early August, with spring plantings following a few weeks behind. As harvest approaches, the foliage begins to change:

• The lower leaves turn yellow and start to flop over first, with the colour creeping upwards.
• Roughly half to two-thirds of the leaves have browned and withered.
• The remaining leaves feel leathery rather than crisp and sappy.
• If you brush the soil away gently, you can see the ridges of individual cloves through the skin.

Stop watering about two to three weeks before you expect to lift. A dry finish firms up the skins and helps the bulbs cure properly. If you are unsure, dig up one plant as a tester. A bulb with well-filled cloves and a tight, papery wrapper is ready; a bulb with thick, fleshy skins around each clove needs a little longer.

Lifting your bulbs without damage

Never tug garlic out of the ground by its stem. The neck is the weakest point on the plant, and a sharp pull leaves you holding a handful of leaves while the bulb stays put. Even when the stem holds, yanking bruises the base and creates entry points for rot.

Use a fork instead. Push it into the soil a good 15cm away from the stem, lever gently backwards and lift the whole plant, easing the bulb free with your hand. Work along the row on a dry day, and keep a trug or tray beside you so nothing sits on damp ground.

Resist the urge to wash the bulbs. Soil washes off easily enough later, but water forced into the crevices between cloves is a fast track to mould. Simply shake off the worst of the earth with your hands, leaving the roots and leaves attached for now — they are part of the curing process.

If heavy rain is forecast and your garlic is nearly ready, lift it anyway and finish the job under cover. A soaking at this stage does more harm than an early harvest.

Curing: the stage most growers rush

Curing is simply drying the bulbs slowly so the outer skins harden and the necks seal. Skip it, or rush it, and your garlic will sweat in storage and collapse into mush within weeks.

Choose somewhere warm, airy and out of direct sunlight — a shaded greenhouse bench, a dry shed, a garage with the door propped open, or a spare room. Aim for around 18–24°C with plenty of moving air. Lay the plants out singly on wire racks, old cake cooling trays or slatted shelves, or tie them in bunches of six to eight and hang them from a rafter. Leave a good gap between bunches.

Avoid sealed boxes, plastic bags and damp cellars. Air movement matters more than heat, so a fan on a low setting is a perfectly sensible investment if your shed is still.

After two to four weeks the bulbs should feel firm and light, the outer skins papery and rustling, the roots brittle, and the neck dry and tight. That is your cue to bring them in for trimming and sorting.

Sorting, trimming and setting some aside

Work through the crop on a dry day, trimming the roots back to about 1cm and cutting the stems to 2–3cm above the bulb. Softneck varieties can be plaited at this stage instead, which looks handsome hanging in a kitchen and keeps the bulbs tidy in one place.

As you trim, be ruthless. Discard any bulb that feels soft, has a blue-grey mould on the base, smells sharp or has cloves already separating. One rotting bulb will spread trouble through the whole store, so it goes in the bin, not the compost heap. A bulb with a little surface rust on the leaves is usually fine once the wrappers are peeled back.

Now choose your seed garlic for next year. Set aside the plumpest, healthiest bulbs from your best plants, keeping them whole rather than breaking them into cloves. Select from a dozen or so plants to keep your stock genetically varied, and label the variety. Autumn is the ideal planting time for most hardnecks, with spring as a fallback.

Where to keep garlic for months of flavour

The kitchen is usually the worst place in the house: too warm, too humid and too full of cooking smells. Garlic stores best somewhere cool, dark and dry with gentle air circulation — around 10–15°C is ideal.

• A cool pantry shelf, an unheated spare room or a garage shelf out of the sun.
• Hanging in netting, paper bags with holes punched in them, or an open basket.
• A breathable terracotta pot or a shallow cardboard box lined with newspaper.

Never seal garlic in plastic. Hardneck varieties such as 'Music' or 'Chesnok Red' generally keep for three to five months, while softnecks like 'Solent Wight' will often last six to nine. Check the store once a month and remove anything that has softened. If you have a glut, peeled cloves freeze beautifully in oil or as a paste.

Common problems and a note on next year

Rust shows as orange spots on the leaves in wet summers. It rarely ruins the bulbs, but lift early if it takes hold. White rot is more serious: infected plants yellow and collapse, and the base of the bulb carries a fluffy white mould with tiny black specks. Remove those plants with the surrounding soil, bin them, and avoid growing any allium in that spot for several years.

Split or burst bulbs usually mean you harvested too late; thin, single-clove bulbs mean they were planted too close together or lifted too soon. Both are still perfectly good to eat — just use them first. Get the timing right, cure properly, and you will be cooking with your own garlic well into next spring.