How to Grow Garlic at Home in the UK

Garlic is one of the most rewarding crops a beginner can grow, and one of the most forgiving. You plant a single clove in autumn, more or less forget about it over winter, and lift a whole fat bulb the following summer. It stores for months, takes up very little room, and tastes nothing like the tired bulbs you find in the supermarket.

This guide takes you through the whole year: choosing between softneck and hardneck garlic, deciding when to plant, getting the cloves in the ground the right way up, and curing the harvest so it keeps right through to spring. Everything here is written for UK gardens and UK timings, so you can follow it as it stands.

Why grow garlic

Garlic earns its place in almost any plot. Here is what makes it such a good crop for beginners.

It is genuinely easy. Garlic asks very little of you. There is no sowing fuss, no pricking out, no hardening off. You push cloves into the soil in autumn, keep the weeds down, and that is most of the job done. If you have never grown anything before, it is a confidence-builder — well up there with the easiest crops for beginners, and a fine first crop if you are just learning how to start a vegetable garden.

It stores for months. Few homegrown crops keep as well. A properly cured softneck bulb will sit in your kitchen happily into the following spring, so a single autumn planting can keep you in garlic for most of the year. That is unusual — most veg has to be eaten, frozen or given away in a glut.

Supermarket garlic disappoints. Shop-bought garlic is usually a warm-climate variety grown abroad, harvested early, and shipped a long way. It is often bland, sometimes already sprouting, and the cloves can be disappointingly small. Homegrown garlic, lifted at the right moment and cured properly, has a depth and a heat that is hard to buy. Hardneck types in particular have flavours you will simply never find on a shelf.

It barely takes up room. Garlic is a narrow, upright crop. You can tuck a row along the edge of a bed, slot it between slower crops, or grow a useful amount in a single raised bed or even a deep container if you are short on ground — see growing food in containers. It also overwinters in ground that would otherwise sit empty from autumn to spring, so it earns its keep when little else is growing.

Garlic belongs to the onion family — the alliums — alongside onions and leeks. If you are building up an allium patch, it makes sense to grow all three; they like similar conditions and follow the same rotation rules, which we will come to below.

Hardneck vs softneck

The first real decision is which type of garlic to grow. There are two families, and they behave quite differently.

Softneck garlic is the kind you usually see in shops. It has no stiff central stalk, which means the soft leaves can be plaited into the classic garlic strings. Softnecks tend to produce more cloves per bulb (often a dozen or more, in two or three layers), they store the longest — frequently right through to the following spring — and they generally suit the milder, lower parts of the UK. The trade-off is flavour: most softnecks are reliable rather than spectacular.

Hardneck garlic sends up a stiff flowering stem, called a scape, from the centre of the bulb. Hardnecks usually have fewer but larger cloves arranged in a single ring, and the flavour is where they shine — richer, more complex, often with real heat. They tend to be hardier and cope better with cold, exposed and northern gardens. The catch is storage: hardnecks do not keep nearly as long as softnecks, so eat them first and save the softnecks for later in the winter.

A simple plan for most growers is to plant some of each — hardnecks to eat first for their flavour, softnecks to store. Here are dependable UK varieties to look for:

The "Wight" varieties are bred and grown on the Isle of Wight specifically for UK conditions, which is exactly why they perform so well here. Whichever you choose, buy proper seed garlic rather than planting from the supermarket — more on that shortly.

Autumn vs spring planting

Garlic is unusual among vegetables because it needs a cold spell to grow well. The cloves require several weeks at low temperatures (broadly below about 10°C) before they will split and form a proper multi-clove bulb. Without that chill, you often get a single round, undivided bulb instead of a neat ring of cloves. This cold requirement is the single most important thing to understand about garlic.

That is why autumn planting is the standard in the UK. Get the cloves in during October or November and they put down roots before winter, sit through the cold months getting the chilling they need, and romp away in spring with a long season ahead of them. Autumn-planted garlic almost always gives the biggest bulbs.

You can also plant in spring (February to March), using varieties sold specifically for spring planting. These are a useful backup if you missed the autumn window, if your ground was waterlogged, or if you garden somewhere very wet where overwintering cloves tend to rot. Spring-planted garlic generally produces slightly smaller bulbs and is harvested a little later, but it still works well.

If you are weighing up the two, we have a full comparison in planting garlic in autumn vs spring, which goes into the timing, the varieties suited to each, and how to decide for your own garden. As a rule of thumb: plant in autumn if you possibly can, and keep spring as the fallback.

Where to grow garlic

Garlic is not fussy, but it does have a few firm preferences. Get the site right and the rest is easy.

Full sun. Garlic wants an open, sunny spot. It will tolerate a little shade but bulbs will be smaller, so give it the brightest position you can.

Free-draining soil. This is the one that really matters. Garlic sitting in cold, waterlogged soil over winter is the classic way to lose a crop to rot. The ground needs to drain freely. If your soil is heavy clay, work in plenty of homemade compost or well-rotted organic matter to open it up, or grow garlic in a raised bed where drainage is naturally better. A spell of improving your soil before planting pays off here, and a no-dig bed topped with compost gives lovely, open conditions for roots.

Not freshly manured. Avoid planting garlic into ground that has just had fresh manure or a heavy dose of nitrogen-rich feed. Too much nitrogen pushes lots of soft leafy growth at the expense of the bulb, and can encourage rot. Soil that was manured for a previous crop is fine — you are simply avoiding a rich, fresh dressing right before planting.

Mind your rotation. Garlic is an allium, and alliums should not follow each other in the same patch year after year. Growing onions, leeks or garlic repeatedly in the same ground lets soil-borne problems — white rot in particular — build up. Move your alliums to a fresh bed each year and leave as long a gap as you can (ideally three or four years) before garlic returns to the same spot. The same rule covers onions and leeks, so plan the whole allium family together. The crop rotation planner makes this easy to keep track of across your beds.

Planting the cloves

Planting garlic is genuinely simple, but a couple of small details make the difference between a fat bulb and a disappointing one.

Start with seed garlic. Buy certified seed garlic from a seed supplier rather than planting cloves from a supermarket bulb. Seed garlic is virus-free, disease-checked, and chosen for the UK climate — supermarket garlic can carry disease and is often a warm-climate variety that never bulbs up properly here. It is one of those small investments that quietly saves you a whole season.

Split the bulb at the last minute. Just before planting, gently break the bulb into individual cloves, keeping the papery skin on each one. Pick out the largest, plumpest cloves to plant — these grow the biggest bulbs. Save the small inner cloves for the kitchen. Do not split the bulb days in advance; separated cloves dry out.

Plant the right way up. This is the detail beginners most often get wrong. Each clove has a flat basal plate at the bottom (where the roots come from) and a pointed tip at the top. Plant it flat end down, pointed end up. Planted upside down, the shoot has to fight its way around and you get a smaller, twisted bulb.

Spacing and depth. Push each clove into soft soil so the tip sits about 2–3cm below the surface — on heavier or wetter ground, planting a touch shallower helps avoid rot. Space cloves about 15cm apart, with 25–30cm between rows. That gives each plant room to size up. Firm the soil gently and water in only if the ground is dry.

Here is the planting process in short:

1. Prepare the bed. Choose a sunny, free-draining spot that has not grown alliums recently. Rake it to a fine, level surface.
2. Split the bulb. Break it into cloves just before planting and pick the biggest ones.
3. Plant flat end down. Set each clove pointed-tip-up, tip 2–3cm deep, 15cm apart in rows 25–30cm apart.
4. Firm and leave. Firm the soil around each clove. Over winter, simply keep an eye out for birds pulling at newly planted cloves — a little netting or fleece deters them until roots take hold.

Caring for garlic

Once planted, garlic is low-maintenance. There are really only three jobs through the season.

Keep it weed-free. Garlic has thin, upright leaves and does not compete well with weeds, which can quickly smother a young row and steal water and nutrients. Hoe or hand-weed regularly, but work shallowly — the bulbs sit close to the surface and are easily nicked. A light mulch between rows helps keep weeds down and locks in moisture.

Water sensibly in spring. Garlic does not need much watering over winter — the soil is usually damp enough, and the danger is too much wet rather than too little. The crop matters most in spring and early summer, when the bulbs are swelling. In a dry spell during this period, give it a good soak every week or two. Then, crucially, stop watering a couple of weeks before harvest. Dry conditions as the bulbs finish help them ripen and cure, and reduce the risk of rot in storage.

Remove scapes on hardneck garlic. In early summer, hardneck varieties send up a curling flower stem — the scape. Left to grow, it diverts energy into making a flower rather than a bigger bulb. Snap or cut the scapes off once they appear and start to curl, and you will get noticeably larger bulbs. Better still, the scapes themselves are delicious — tender, mildly garlicky, and lovely chopped into a stir-fry or pesto. Softneck garlic does not usually produce scapes, so there is nothing to do there.

A light feed of a balanced or high-potash fertiliser in early spring can help, especially on poorer soils, but avoid anything heavy in nitrogen — as with planting, too much nitrogen grows leaves at the expense of bulbs.

Rust and other problems

Garlic is one of the healthier crops you can grow, but a few problems crop up. None of them need worry you much.

Rust is the most common. It shows as orange or rusty-brown spots and pustules on the leaves, usually in early summer, and is more likely in warm, humid weather or where plants are crowded. Mild rust late in the season often does little harm — the bulbs have largely formed by then, so you can usually carry on to harvest as normal. To reduce it: space plants well for airflow, keep on top of weeds, water the soil rather than the leaves, and avoid planting alliums in the same spot two years running. Remove badly affected leaves and clear away debris at the end of the season.

White rot is the one to take seriously. It is a soil-borne fungus affecting the whole allium family, showing as yellowing, wilting leaves and a fluffy white mould with small black dots around the base of the bulb. There is no cure, and the fungus persists in the soil for many years. Prevention is everything: buy clean seed garlic, never plant supermarket cloves, and rotate your alliums onto fresh ground. If white rot does appear, lift and bin (do not compost) affected plants and avoid growing any allium on that ground for as long as possible. We cover the symptoms and your options in detail in the onion white rot guide, which applies to garlic too.

Bolting — sending up a premature flower stem — can happen if cloves are stressed, often after a cold snap followed by a sudden warm spell. On hardnecks the scape is normal and you simply remove it; on softnecks an unexpected flower stem can be snapped off the same way. The bulb is still perfectly usable; just eat it sooner, as bolted garlic does not store as well.

Birds sometimes tug freshly planted cloves out of the ground in autumn, mistaking them for food or simply for fun. A bit of netting or fleece over the row until the cloves root themselves solves it.

Harvesting and curing

Knowing when to lift garlic is the part beginners most often get wrong — and harvesting at the right moment makes all the difference to storage.

Watch the leaves, not the calendar. Garlic is ready when the lower leaves have turned yellow and started to die back, while several upper leaves are still green — usually around June or July in the UK, with autumn-planted garlic ready before spring-planted. Each green leaf corresponds to a protective papery layer around the bulb, so you want a few still green: that is what gives you well-wrapped bulbs that store. Wait too long and the bulbs split open in the soil, the skins rot, and they will not keep.

Lift gently. Do not pull garlic up by the leaves — you will tear the tops off or bruise the bulb. Instead, ease a fork in well clear of the bulb and lift from underneath, then gently shake off the loose soil. Bruised bulbs do not store, so handle them carefully.

Cure before storing. This is the step that turns a fresh bulb into one that keeps for months. Lay the lifted garlic somewhere warm, dry and airy with good air circulation — a greenhouse bench, a porch, a shed, or a sunny windowsill all work, and outdoors in dry weather is fine too. Leave the bulbs to dry, leaves and all, for two to four weeks, until the outer skins are papery, the roots are dry and brittle, and the necks have shrivelled. Properly cured garlic stores far better than garlic used straight from the ground.

Store it cool and dry. Once cured, trim the roots and either trim the dried tops or, for softnecks, plait them into a string. Store the bulbs somewhere cool, dry and airy — not in the fridge, and never in a sealed bag, where they sweat and rot. Eat your hardnecks first, as they keep for a few months at best; well-cured softnecks will often see you through to the following spring. And remember to save a few of your best bulbs to replant in the autumn — your own garlic gradually adapts to your garden.

When you are ready to plant, certified seed garlic is worth buying fresh each year rather than relying on saved cloves alone — it keeps your stock clean and virus-free. The kit below covers the few jobs garlic actually asks of you.

A quick recap

Plant certified seed garlic in autumn (October–November), choosing free-draining ground in full sun that has not recently grown alliums. Set the cloves flat end down, pointed tip up, 15cm apart. Keep the weeds down, water through spring while the bulbs swell, and snap the scapes off hardneck varieties for bigger bulbs. Lift in June or July when the lower leaves yellow, cure the bulbs for a few weeks, then store them somewhere cool and dry.

Do that and you will have a string of your own garlic hanging in the kitchen — and a crop you can grow again, better, every year. To round out your allium patch, have a look at growing onions and growing leeks next, or browse the rest of the vegetable growing guides for ideas on what to pair them with.