How to Grow Garlic from a Bulb – Can You Plant Supermarket Garlic?

Have you ever picked up a bulb of garlic from your kitchen and wondered whether you could plant it in the garden and grow even more garlic?

It’s something many gardeners think about, especially when autumn arrives and everyone starts preparing their vegetable beds for the following growing season.

The good news is that you can grow garlic from a bulb, and it’s actually one of the easiest ways to grow this popular crop.

However, there’s something important you need to understand before you start planting.

You don’t normally plant the whole garlic bulb. Instead, you separate it into individual cloves, with each clove having the potential to grow into a brand-new bulb.

Another question I often see gardeners asking is whether supermarket garlic can be planted.

After all, if you’ve already got garlic sitting in your kitchen cupboard, why spend money purchasing special garlic bulbs for planting?

Although supermarket garlic can sometimes grow, there are several reasons why it might not be the best choice for your garden or allotment.

Here at Gardening with Ben, I love growing garlic because it’s a relatively low-maintenance crop that you can plant during autumn and harvest the following summer.

It’s also a great way to keep your vegetable beds productive when many of your summer crops have finished.

In this complete UK guide, we’re going to look at everything you need to know about growing garlic from a bulb, including whether shop-bought garlic will grow, choosing the right varieties, when to plant, how deep to plant your cloves, feeding, watering and harvesting.

We’ll also cover common mistakes and problems to help you produce healthy bulbs of your own.

Can You Grow Garlic from a Bulb?

Yes, absolutely!

Garlic is most commonly grown from cloves rather than ordinary seeds.

A garlic bulb consists of individual cloves surrounded by a protective papery covering.

Each healthy clove contains a growing point and stored energy that allows it to develop roots and shoots once planted.

Over the growing season, the new plant develops leaves above ground and eventually forms a fresh garlic bulb beneath the soil.

This process means you can multiply a small amount of planting garlic into a much larger harvest.

How Many Garlic Plants Can You Grow from One Bulb?

This depends on the type of garlic.

Some bulbs contain six or eight large cloves, while others contain considerably more smaller cloves.

For example, if you’ve purchased a healthy garlic bulb containing ten suitable cloves, you could potentially grow ten separate garlic plants.

If all ten grow successfully and produce mature bulbs, you’ll have turned one bulb into ten.

Of course, success depends on the health of your planting material, growing conditions and the way you care for the crop.

Do You Plant the Whole Garlic Bulb?

No, not if you’re aiming to grow a good harvest of full-sized bulbs.

You should normally separate the bulb into individual cloves before planting.

If you put an entire bulb into the ground, several plants may emerge very close together.

They’ll compete for sunlight, nutrients, moisture and growing space.

This overcrowding can prevent individual bulbs from developing properly.

For the best results, plant each clove separately at the correct spacing.

Can You Plant Supermarket Garlic in the UK?

Yes, supermarket garlic can sometimes grow successfully when planted in soil.

You may even have noticed garlic beginning to sprout in your kitchen cupboard.

Those little green shoots demonstrate that the clove is still capable of growing.

However, just because supermarket garlic can sprout doesn’t necessarily mean it’s a good choice for planting in your allotment.

There are several things you should consider.

1. Supermarket Garlic May Not Suit British Weather

Garlic sold in UK supermarkets can come from different countries and growing regions.

Some varieties have been selected for growing in climates that differ significantly from the UK.

Although those bulbs might produce leaves when planted here, they may struggle to form large, properly divided bulbs.

Garlic responds to factors including temperature, cold exposure and day length.

Choosing varieties known to grow well in Britain gives you a better chance of success.

2. Supermarket Garlic Can Introduce Diseases

This is probably the biggest reason to be cautious.

Garlic intended for consumption isn’t necessarily produced or checked to the same standards as planting stock.

Planting unsuitable material can introduce pests or diseases into your garden.

One particular concern is onion white rot, a serious disease that affects garlic, onions and related crops.

Once introduced, its resting structures can survive in the soil for many years.

That makes it especially troublesome on an allotment where you want to keep growing onions, garlic and shallots.

3. The Bulbs May Have Been Stored for a Long Time

Garlic intended for eating may have spent weeks or months in storage.

Its growing performance can be affected by storage temperature, age and general condition.

Some supermarket cloves may sprout quickly.

Others may grow poorly.

4. You Might Not Know the Variety

When purchasing planting garlic from a garden centre or reputable supplier, you can usually choose a named variety.

This means you can find out whether it’s suitable for autumn planting, how hardy it is and how long the harvested bulbs might store.

Supermarket garlic is often sold without that information.

5. You May Get a Smaller Harvest

Even if supermarket garlic grows well initially, the final bulbs may be smaller than expected.

That’s particularly likely if the variety isn’t well suited to UK growing conditions.

So, Should You Plant Supermarket Garlic?

If you’re curious about garlic sprouting, a clove in a pot can make an interesting observation project.

However, for a productive vegetable garden, I recommend buying healthy, named garlic bulbs intended for planting from a reputable supplier.

This is particularly important if you have permanent raised beds or established allotment soil that you want to protect from persistent diseases.

What’s the Difference Between Supermarket Garlic and Planting Garlic?

Supermarket garlic	Garlic sold for planting
Primarily intended for eating	Specifically intended for cultivation
Variety may not be identified	Usually sold as a named variety
May not suit the UK climate	You can select UK-suitable varieties
Planting-related disease risks may be unknown	Reputable suppliers apply appropriate planting-stock controls
Growing results can be unpredictable	Generally a more reliable starting point

Purchasing proper planting garlic doesn’t guarantee that every clove will succeed.

You still need suitable soil, weather conditions and care.

But it removes some avoidable uncertainty.

When Should You Plant Garlic Bulbs in the UK?

One of the best things about garlic is that many varieties can be planted during autumn.

While you’re clearing summer crops and preparing your vegetable beds for winter, you can already begin planting for next year’s harvest.

Planting Garlic in October

October is an excellent time to plant many autumn garlic varieties.

The soil is often still workable, and the cloves can begin developing roots before the coldest weather arrives.

This is one reason garlic is such a useful autumn crop.

Planting Garlic in November

November is another common planting month.

Garlic benefits from exposure to cold, which helps many varieties form separate cloves within the developing bulbs.

Planting Garlic in December

Suitable varieties may also be planted during December.

Avoid planting when the soil is frozen or waterlogged.

Can You Plant Garlic in Spring?

Yes.

Some garlic varieties are suitable for planting during late winter or early spring.

However, spring planting leaves less growing time before summer.

Some varieties also need a sufficient period of cold to develop properly divided bulbs.

When Will Autumn-Planted Garlic Be Ready?

Many autumn-planted garlic crops are harvested between late spring and summer.

For example, garlic planted during October or November may be ready the following June or July.

The actual date depends on the variety and weather.

Choosing the Best Garlic Bulbs to Grow

Before planting, spend a little time choosing your garlic.

There are two main groups you’ll commonly come across: hardneck and softneck.

Hardneck Garlic

Hardneck varieties generally produce a firm central stem.

They often develop fewer but larger cloves.

Many hardneck types cope well with cold winter conditions.

They can also produce flowering stems known as garlic scapes.

These are edible when harvested young.

However, hardneck varieties generally don’t store for as long as good softneck varieties.

Softneck Garlic

Softneck varieties commonly produce more cloves packed closely together.

They generally store for longer when harvested and cured properly.

Some varieties have flexible stems that can be braided for storage.

Which Garlic Varieties Grow Well in the UK?

Varieties worth investigating include:

• ‘Solent Wight’ – a softneck garlic well adapted to British growing conditions.
• ‘Germidour’ – a popular softneck variety known for producing large bulbs.
• ‘Cristo’ – a softneck variety with a strong flavour.
• ‘Arno’ – another softneck variety valued for storage.

Availability and recommended planting times vary, so always follow the supplier’s instructions.

Where Is the Best Place to Grow Garlic?

Garlic isn’t particularly demanding, but choosing the correct location makes a difference.

Give Garlic Plenty of Sunlight

Garlic grows best in a sunny position.

Aim for an area receiving direct sunlight for much of the day.

Shady conditions can weaken growth and reduce bulb development.

Choose Well-Drained Soil

Garlic dislikes sitting in waterlogged ground.

Wet winter conditions can lead to rotting cloves and poor establishment.

If you’ve got heavy clay soil, consider improving the structure or using raised beds.

Avoid Fresh Manure

Fresh manure immediately before planting isn’t recommended.

Use mature compost or well-rotted organic matter to improve the ground where needed.

Remove Perennial Weeds

Garlic doesn’t compete particularly well with weeds.

Remove persistent weeds before planting, especially those with extensive underground roots.

How to Grow Garlic from a Bulb – Step-by-Step Instructions

Now we’re getting to the important part: actually planting your garlic.

Step 1: Prepare Your Garlic Bulb

Take a healthy bulb of garlic intended for planting.

It should be firm and free from visible signs of mould, soft patches or decay.

Don’t use cloves that appear damaged or diseased.

Step 2: Separate the Bulb into Individual Cloves

Carefully break apart the garlic bulb.

Try to keep the papery outer covering on each individual clove.

You don’t need to peel the cloves.

Avoid damaging their bases, which is where the roots will develop.

Step 3: Prepare Your Soil

Choose a sunny position.

Remove weeds and loosen the soil if necessary.

If your ground needs improvement, incorporate suitable mature compost ahead of planting.

For no-dig beds, you can plant into suitably prepared surface compost.

Step 4: Make Your Planting Holes

Use a dibber, trowel or your fingers to create planting holes.

The correct depth depends on your soil and chosen variety.

As a reliable starting point, aim for the tip of the clove to sit around 2.5 cm below the soil surface.

Deeper planting may be appropriate in light soils, but avoid excessively deep planting in heavy, wet ground.

Step 5: Plant the Clove the Correct Way Up

Place each clove with:

• The pointed end facing upwards.
• The flat basal plate facing downwards.

This allows shoots and roots to develop in their natural directions.

Step 6: Space the Garlic Correctly

For ordinary garlic, aim for approximately:

• 15 cm between individual cloves.
• 30 cm between rows.

Larger varieties may require additional space.

Correct spacing reduces competition and allows good airflow around the foliage.

Step 7: Cover the Cloves

Cover each clove with soil.

Gently firm the surface without compacting the ground excessively.

Step 8: Water if Needed

If the soil is dry, give the area a light watering.

During a typical wet British autumn, additional water may not be needed.

Step 9: Protect from Birds

Birds sometimes disturb newly planted garlic.

If necessary, use securely installed fleece or suitable wildlife-safe protection until the cloves establish.

Step 10: Leave the Garlic to Grow

That’s the planting finished.

You don’t need to keep digging the cloves up to check whether they’re growing.

Roots develop underground, and green shoots will appear when conditions are suitable.

Gardening with Ben tip: Plant a few more cloves than you think you’ll need, provided you have space. It’s always useful to have a little extra garlic for cooking and potentially saving healthy bulbs for future planting.

Can You Grow Garlic from a Bulb in Raised Beds?

Yes, and raised beds can be one of the best places to grow garlic.

They’re particularly useful if your normal garden soil stays wet throughout winter.

Benefits of Raised Beds

Raised beds may offer:

• Better drainage where correctly constructed.
• Easier access for weeding.
• More controlled planting layouts.
• Less soil compaction from foot traffic.
• Improved opportunities to add organic matter.

Preparing a Raised Bed for Garlic

Remove weeds and finished crops.

Make sure the bed contains suitable, reasonably fertile soil.

Add mature compost if needed.

Plant cloves at the recommended depth and spacing.

Should You Add Mulch?

A suitable mulch can help reduce weeds and protect the soil.

However, avoid burying emerging garlic shoots or creating overly wet conditions around the cloves.

If your bed already has a thick surface mulch, you may need to adjust it around the planting holes.

Can You Grow Garlic from a Bulb in Pots?

Absolutely.

You don’t need an allotment to grow garlic.

A large container on a sunny patio can work very well.

What Size Pot Do You Need?

Choose a container at least 25 cm deep, with enough width to space the cloves approximately 15 cm apart.

The wider the container, the more cloves you can grow.

What Compost Should You Use?

Use a good-quality peat-free multipurpose compost that drains adequately.

How to Plant Garlic in Pots

Fill the container with compost.

Separate the bulb into cloves.

Plant each clove individually with its pointed end upwards.

Water lightly if needed.

Place the pot in a sunny position.

Protecting Pots in Winter

Make sure drainage holes remain clear.

Raise containers on pot feet if necessary.

Remember that prolonged freezing weather can affect container-grown plants more severely than those established in the ground.

Watering Garlic in Pots

Container compost can dry out faster than garden soil.

Check regularly, particularly during spring.

Avoid keeping the compost saturated.

Should You Feed Garlic After Planting?

Garlic grows best in reasonably fertile soil.

However, adding large amounts of fertiliser doesn’t automatically produce large bulbs.

Feeding in Autumn

If your soil has been prepared with suitable organic matter, immediate additional feeding may not be necessary.

Garlic grows relatively slowly during the coldest months.

Feeding in Spring

As temperatures improve and foliage develops, garlic may benefit from appropriate feeding if soil nutrients are insufficient.

A suitable balanced fertiliser can be used according to the manufacturer’s instructions.

Can You Use Chicken Manure Pellets?

Chicken manure pellets can supply nutrients.

However, they may contain substantial amounts of nitrogen.

Use them carefully rather than applying excessive quantities.

When Should You Stop Feeding?

Avoid unnecessary high-nitrogen feeding as the bulbs approach maturity.

The aim is to encourage healthy growth and properly developed bulbs.

How Often Should You Water Garlic?

Garlic needs moisture during active growth.

But waterlogging is one of the most common causes of problems, particularly during British winters.

Autumn

Natural rainfall is usually sufficient.

Winter

Most outdoor garlic requires little additional watering.

Check for problems with drainage rather than automatically watering.

Spring

During prolonged dry spells, water garlic to help support leaf growth and bulb development.

Early Summer

Continue checking soil moisture while bulbs are developing.

As the crop approaches maturity and leaves begin naturally yellowing, reduce watering.

Excessive moisture near harvest can increase the risk of bulb deterioration.

How Long Does Garlic Take to Grow from a Bulb?

Garlic isn’t a particularly fast crop.

If you plant cloves during October or November, the plants normally remain in the ground until the following late spring or summer.

This means garlic may occupy your growing space for around seven to nine months, sometimes longer.

Autumn: Root Development

The cloves begin producing roots.

Some may also develop green shoots.

Winter: Slow Growth

Cold temperatures and shorter days slow visible growth.

Don’t worry if the crop appears to be doing very little.

Spring: Strong Leaf Growth

As days become longer and temperatures rise, garlic grows more vigorously.

Healthy foliage is important because it supports developing bulbs.

Late Spring and Summer: Bulb Development

Depending on variety and conditions, the bulbs begin swelling and forming cloves.

Eventually the foliage starts showing signs of maturity.

How Do You Know When Garlic Is Ready to Harvest?

One of the biggest mistakes is harvesting garlic too early or leaving it in the ground too long.

Look for Yellowing Leaves

As garlic approaches maturity, the lower leaves often start yellowing and drying.

However, yellowing can also occur because of disease or stress.

Use the overall condition of the crop rather than relying on a single leaf.

Check a Sample Bulb

Carefully lift one plant.

Look for a mature bulb with well-developed cloves and suitable protective wrappers.

Don’t Leave Garlic Too Long

Overmature bulbs can split apart.

Their wrappers may deteriorate, making them less suitable for storage.

Typical Harvesting Times in the UK

Autumn-planted garlic is commonly ready from late spring to midsummer.

Spring-planted garlic may be harvested later.

Always consider your chosen variety and growing conditions.

How to Harvest Garlic Without Damaging It

When harvesting time arrives, handle the bulbs carefully.

Step 1: Loosen the Ground

Use a garden fork to loosen soil around the bulbs.

Keep the fork far enough away to avoid damaging them.

Step 2: Lift Carefully

Lift each plant from beneath rather than pulling forcefully on the foliage.

Step 3: Remove Loose Soil

Gently brush away excess soil.

Avoid knocking bulbs together.

Step 4: Inspect the Crop

Look for damaged or diseased bulbs.

Discard rotten or suspicious bulbs appropriately.

Step 5: Begin Drying

Move healthy bulbs into suitable drying conditions.

Don’t store freshly harvested garlic in sealed plastic bags.

How to Dry and Store Your Home-Grown Garlic

Proper drying, also called curing, helps garlic last longer in storage.

Choose a Dry, Airy Location

A covered, well-ventilated space is ideal.

Avoid prolonged damp conditions and excessive heat.

Allow Several Weeks

Garlic commonly needs around two to four weeks to dry initially, depending on conditions.

Check the Leaves and Wrappers

The stems and outer wrappers should become dry.

Trim When Ready

Once cured, you can trim roots and stems or braid suitable softneck varieties.

Store in Breathable Containers

Mesh bags, baskets and other well-ventilated containers can work well.

Keep the garlic in a cool, dry location.

Check Your Stored Bulbs

Inspect periodically for signs of mould, sprouting or decay.

Use bulbs that are deteriorating while still safe to eat, and discard rotten ones.

Why Is My Garlic Not Forming Proper Bulbs?

Sometimes garlic produces plenty of green foliage but disappointingly small bulbs.

There are several possible reasons.

Not Enough Cold Weather

Many garlic varieties need a period of cold to develop properly divided bulbs.

Without sufficient cold exposure, some plants produce a single round bulb.

Planting Too Late

Late planting can reduce the time available for growth and bulb development.

Growing in Too Much Shade

Garlic prefers plenty of sunlight.

Not Enough Growing Space

Overcrowded plants compete for moisture, nutrients and light.

Poor Soil Conditions

Compacted, waterlogged or infertile soil can reduce performance.

Drought During Spring

Dry conditions during active growth may restrict bulb size.

Wrong Variety

Garlic poorly suited to the UK climate may not perform as expected.

Garlic Pests and Diseases to Watch Out For

Garlic is usually a relatively straightforward crop, but it isn’t completely free from problems.

Onion White Rot

This serious fungal disease can affect garlic, onions, shallots and leeks.

Plants may develop yellow foliage, poor growth and root decay.

The pathogen can persist in soil for many years.

Avoid moving contaminated soil, tools or planting material into unaffected areas.

Leek Rust

Rust can produce orange-brown pustules on leaves.

Severe infections may reduce growth.

Keep plants in suitable conditions and avoid unnecessary overcrowding.

Allium Leaf Miner

This pest attacks several members of the onion family.

The larvae feed within plant tissues and can cause distortion and damage.

Suitable fine-mesh protection may help exclude egg-laying adults when installed at the correct time.

Onion Fly

Onion fly larvae may damage the roots or bulbs of allium crops.

Good hygiene and appropriate crop protection can help reduce problems.

Ten Mistakes to Avoid When Growing Garlic from a Bulb

1. Planting the entire garlic bulb. Separate it into individual cloves for normal bulb production.
2. Using questionable planting stock. Buy healthy garlic intended for cultivation.
3. Planting in waterlogged soil. Drainage is essential.
4. Choosing the wrong variety. Select garlic suited to your region and planting season.
5. Planting the cloves upside down. The pointed end should face upwards.
6. Planting too closely together. Give bulbs enough room to develop.
7. Allowing weeds to take over. Keep the growing area reasonably weed-free.
8. Overfeeding with nitrogen. Avoid excessive fertiliser.
9. Ignoring dry spring weather. Water during prolonged dry spells.
10. Harvesting at the wrong time. Check bulb maturity before lifting the entire crop.

Month-by-Month Garlic Growing Calendar for the UK

Month	What to do
January	Check drainage and inspect autumn-planted garlic.
February	Plant suitable spring varieties if conditions allow.
March	Remove weeds and monitor new growth.
April	Water during dry spells and assess feeding needs.
May	Watch for pests, diseases and developing bulbs.
June	Start checking early-maturing varieties for harvest.
July	Harvest many autumn-planted crops and begin curing.
August	Harvest later varieties and store properly cured bulbs.
September	Choose planting varieties and prepare soil.
October	Plant autumn garlic cloves.
November	Continue planting suitable garlic varieties.
December	Monitor drainage and protect newly planted cloves from disturbance.

These timings are approximate and will vary across the UK.

Frequently Asked Questions About Growing Garlic from a Bulb

Can I plant a garlic bulb from Tesco, Aldi or Lidl?

It may sprout and grow, but supermarket garlic isn’t recommended as reliable planting stock. It may not suit UK conditions and can carry disease risks.

Can you plant a whole garlic bulb without separating it?

You can physically plant it, and multiple shoots may emerge, but the cloves will compete for space. Separate them if you want to grow normal, well-developed bulbs.

How many garlic bulbs will one bulb produce?

Each healthy planted clove can potentially produce one new bulb. The total depends on how many viable cloves the original bulb contains.

Do I need to peel garlic before planting?

No. Keep the papery covering around each clove intact where possible.

What is the best month to plant garlic in the UK?

October and November are popular months for autumn garlic. Some varieties are suitable for later winter or spring planting.

How deep should I plant garlic cloves?

As a general guide, position the clove with its tip about 2.5 cm below the surface. Adjust according to soil type and variety instructions.

Will garlic survive a British winter?

Suitable garlic varieties are hardy and normally tolerate UK winter temperatures. Prolonged waterlogging can be a greater problem than ordinary winter cold.

Can I grow garlic in a greenhouse?

Garlic can grow under cover, but many varieties require suitable cold exposure to form good bulbs. Outdoor growing is often simpler.

Does garlic need lots of water?

Garlic needs moisture during active growth, particularly in dry spring weather. It doesn’t tolerate prolonged waterlogging well.

Can I grow garlic in a small garden?

Yes. Raised beds and adequately sized containers can be very suitable.

Why has my garlic grown as one large clove?

This may happen when the plant hasn’t experienced sufficient cold for proper bulb division or when other growing conditions haven’t been ideal.

When can I harvest garlic planted in October?

Many varieties will be ready during late spring or summer the following year. Check the foliage and a sample bulb rather than relying only on the calendar.

Can I save garlic bulbs to plant next year?

Healthy home-grown bulbs can sometimes be saved for replanting. Only use material from crops showing no signs of disease.

Final Thoughts: Should You Grow Garlic from a Bulb?

Growing garlic from a bulb is a simple and rewarding way to produce your own garlic at home.

It’s especially useful for UK gardeners because suitable varieties can be planted during autumn, allowing you to get another crop underway while many other vegetables are finishing.

The most important thing to remember is to separate the bulb into individual cloves before planting.

Give every clove enough space, choose a sunny position and make sure the soil drains properly.

Although supermarket garlic can sometimes grow, I recommend choosing healthy planting garlic from a reputable supplier to reduce unnecessary risks and improve your chances of success.

Once planted, garlic generally requires relatively little maintenance.

Keep weeds under control, water during prolonged dry spells and monitor your plants as they develop through spring.

By summer, you could be harvesting your own fresh garlic bulbs, ready to dry, store and use in the kitchen.

And there’s something particularly satisfying about knowing that an entire harvest began with just a handful of cloves planted months earlier.

Whether you’re growing in a raised bed, a traditional allotment or a few containers on your patio, garlic is a fantastic crop to try.

Keep smiling, keep shining, keep gardening with Ben!