When to Harvest Garlic in the UK

Q: What happens if I leave garlic in the ground too long?

The bulb wrappers can split and the cloves separate, which ruins the bulb for storage even if it still tastes fine fresh. Once most of the lower leaves have died back, it's better to lift promptly than wait for perfect conditions.

The key sign: lower leaves turning yellow

Garlic tells you it's ready through its leaves, not its size underground. Watch for the lower third to half of the leaves turning yellow and starting to die back, while the upper leaves are still green. That's the point to start checking, rather than waiting for every leaf to collapse.

For most UK growers planting in October or November, this lands somewhere in June or July, roughly 8 to 9 months after planting. Hardneck varieties tend to be ready slightly earlier than softneck.

Why "wait a bit longer" can backfire

The trade-off, in short

Garlic left too long doesn't just sit there safely: the bulb wrappers can split and the cloves separate from each other, which ruins it for storage even though it's still edible fresh. Unlike onions, there's no real upside to waiting for the leaves to fully die back. Once you're past the halfway-yellow point, lifting promptly is the safer call.

How to lift it properly

Loosen the soil with a fork a little distance from the bulb before pulling: tugging on the leaves directly can snap them off the bulb, especially in dry soil. Lift gently, brush off loose soil, and avoid washing the bulbs if you're planning to store them; the wrapper stays in better condition dry.

Curing for storage

Fresh-lifted garlic needs curing before it's ready for long-term storage. Lay the bulbs out in a single layer, leaves still attached, somewhere warm, dry and airy: RHS dries them in the sun or a well-ventilated greenhouse, avoiding heat above 30°C. Initial drying takes two to four weeks, depending on the weather.(RHS) The outer skins should turn fully papery before you trim and store them, at 5 to 10°C somewhere cool and dry.(RHS)

Softneck varieties properly cured will keep for up to a year. Hardneck varieties have the better flavour but typically only store for 4 to 6 months, so plan to use those first.

Where the sources differ

Two good sources, two answers. Both are shown rather than the convenient one.

Where the sources differ
Question	RHS	Garden Organic
When to lift	Once the leaves have turned yellow.	When the first four to six leaves turn yellow, which is earlier.
Storage temperature	5 to 10°C, cool and dry.	Ideally 2 to 4°C for the onion family, protected from freezing.

Sources: RHS, Garlic: grow your own; Garden Organic, Garlic; Garden Organic, Harvesting and storing vegetables. Read 19 September 2026.

Frequently asked questions

When should I harvest garlic in the UK?

Most UK-grown garlic is ready in June or July, around 8–9 months after autumn planting. The clearest sign is the lower leaves turning yellow while the upper leaves are still green.

What happens if I leave garlic in the ground too long?

The bulb wrappers can split and the cloves separate, ruining the bulb for storage even though it's still fine to eat fresh. Once most lower leaves have died back, lift promptly rather than waiting.

How do I cure garlic after harvesting?

Lift carefully with a fork, brush off loose soil without washing, and leave the bulbs somewhere warm, dry, and well ventilated for 3–4 weeks until the outer skins are fully papery.

Keep track of your garlic

Vercro keeps your garlic's planting date and stage, and shows it on Today when it is worth checking, so you don't have to remember when you planted it.

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