Growing Garlic in Pots in the UK – Complete Guide

Growing garlic in pots is one of the easiest ways to enjoy home-grown garlic in the UK, even if you haven’t got a vegetable garden or allotment.

You don’t need acres of growing space to produce delicious garlic bulbs. A few well-chosen containers, some healthy planting cloves and a sunny outdoor position can be enough to get started.

Whether you’ve got a small patio, balcony, courtyard or simply want to make better use of the space around your home, garlic is a fantastic crop to try.

Here at Gardening with Ben, I love growing garlic because it’s relatively straightforward to look after, particularly when planted during autumn.

I grow garlic and elephant garlic on the allotment, and it’s always exciting watching those first green shoots appear when so many other crops have finished for the year.

One of the biggest advantages of growing garlic is that many varieties can be planted during October or November and left to establish through the colder months.

By the following summer, you could be harvesting your own garlic bulbs for cooking.

However, there are a few important things to get right.

Choosing the correct pot, giving each clove enough space, using good-quality compost and avoiding waterlogging can make a huge difference to your final harvest.

In this complete UK guide, I’ll explain everything you need to know about growing garlic in pots, from choosing varieties and planting your cloves to watering, feeding, overwintering, harvesting and storing your bulbs.

Can You Grow Garlic Successfully in Pots?

Yes, garlic can grow very successfully in containers.

In fact, container growing has several advantages, especially if you’re working with limited space or have heavy garden soil that stays wet during winter.

Garlic produces roots beneath the compost and long, narrow green leaves above the surface.

As the growing season progresses, the plant uses energy from its foliage to form a bulb underground.

If growing conditions are suitable, that bulb develops several individual cloves.

Benefits of Growing Garlic in Containers

There are several reasons why I’d recommend growing garlic in pots.

You don’t need a garden. A patio or suitable balcony may provide enough room for a few plants.

You can control the growing medium. Containers allow you to choose compost that drains well instead of struggling with heavy or compacted garden soil.

Weeding is easier. There are usually fewer weeds to remove compared with growing garlic directly in the ground.

Pots can be moved. If severe weather arrives, suitable containers can be moved into a more sheltered outdoor position.

Harvesting is straightforward. Once the bulbs are mature, you can carefully loosen the compost and lift them.

However, containers also have disadvantages.

Compost dries out faster than garden soil, especially during warmer weather, and the limited volume means moisture and nutrients require more attention.

When to Plant Garlic in Pots in the UK

Timing is one of the most important parts of growing garlic successfully.

For many garlic varieties, autumn is the best planting season.

Growing Garlic in Pots in October

October is an excellent month for planting suitable autumn garlic.

The compost is often still relatively warm, helping cloves begin developing roots.

As temperatures fall, the plants receive natural exposure to cold weather.

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

Planting Garlic in November

November is another popular month.

You can continue planting autumn varieties provided conditions are suitable.

Make sure containers aren’t sitting in waterlogged compost.

Can You Plant Garlic in December?

Yes, some garlic varieties can still be planted during December.

Choose varieties suited to winter planting and avoid working with frozen compost.

Planting Garlic in January or February

Certain garlic varieties are suitable for late-winter planting.

They may produce worthwhile crops, although results depend on the variety and growing conditions.

Can Garlic Be Planted in Spring?

Yes, but not every variety is equally suitable.

Spring-planted garlic has less time to develop before harvesting.

Some varieties may also need appropriate cold exposure to develop separate cloves.

Always check your chosen variety’s recommended planting dates.

Gardening with Ben tip: If you’re planting garlic in October or November, you normally don’t need a heated greenhouse. A suitably hardy variety can grow outdoors and benefit from natural winter conditions.

What Size Pot Do You Need to Grow Garlic?

Choosing the right pot is essential.

Although garlic doesn’t need an enormous growing area, each plant requires enough space for its roots and developing bulb.

Minimum Depth for Garlic Pots

Choose a container at least 25 cm deep.

A depth of 30 cm or more is useful if you have the space.

The extra compost volume can help reduce rapid moisture fluctuations.

How Wide Should the Pot Be?

Width determines how many cloves you can plant.

For full-sized bulb production, aim to position cloves approximately 15 cm apart.

Leave some space around the edges of the container as well.

How Many Garlic Cloves Can You Plant in a Pot?

Here are some practical starting points:

Pot size	Approximate number of cloves
25–30 cm diameter	1–2
35–40 cm diameter	2–3
45–50 cm diameter	3–5
60 cm long trough	3–4 in a single row
Large raised planter	Based on 15 cm spacing in each direction

These are guidelines rather than strict rules.

Different container shapes affect how much growing room is available.

Don’t try to squeeze extra plants into a small container simply to increase the harvest.

You may end up with smaller bulbs.

Can You Grow Garlic in a 30-Litre Plant Pot?

Yes!

A 30-litre container can be a useful choice for garlic, provided it’s sufficiently wide and deep.

The main thing is to calculate how many plants will comfortably fit.

A narrow, deep pot may hold the same volume as a wider one but provide less useful planting space.

Which Type of Pot Is Best?

Several different containers can work well.

Plastic Pots

Large plastic plant pots are practical and relatively lightweight.

They retain moisture more readily than porous terracotta and are easy to move.

Terracotta Pots

Terracotta can look beautiful on a patio.

However, it may dry out more quickly and some terracotta pots can crack during freezing weather.

Choose frost-resistant products if they’ll remain outdoors.

Wooden Planters

Wooden troughs and raised planters are useful when growing several garlic plants together.

Make sure excess water can drain away.

Fabric Growing Bags

Fabric containers can work, but they may lose moisture relatively quickly.

You’ll need to monitor watering more closely during spring and summer.

Recycled Containers

Large containers can sometimes be repurposed for growing garlic.

Make sure they’re suitable for food-growing, clean and have proper drainage.

Avoid anything that previously held hazardous chemicals.

What Is the Best Compost for Growing Garlic in Pots?

Garlic needs compost that provides nutrients while allowing excess water to escape.

One of the biggest mistakes is using a growing medium that remains saturated for long periods.

Peat-Free Multipurpose Compost

Good-quality peat-free multipurpose compost is a useful choice.

Look for a product intended for container growing.

Soil-Based Potting Compost

A suitable peat-free soil-based mix can also work well.

These mixes can provide greater weight and stability for large outdoor containers.

Should You Add Horticultural Grit?

If the growing mix has poor drainage, a suitable free-draining amendment may help.

However, you don’t automatically need to add grit to every container.

Good-quality compost and clear drainage holes are more important.

Should You Put Gravel at the Bottom of the Pot?

No.

Adding a thick layer of gravel beneath the compost doesn’t reliably improve root-zone drainage and reduces the amount of growing medium available.

Instead, use a suitable potting mix throughout the container.

Make sure the drainage holes aren’t blocked.

Can You Use Garden Soil in Pots?

Ordinary garden soil can become compacted when used alone in containers.

It may also drain poorly.

For beginners, a purpose-made potting compost is normally the easier option.

Which Garlic Varieties Grow Best in UK Containers?

Both hardneck and softneck garlic can be grown in pots.

Choose healthy, named varieties suitable for UK conditions.

‘Solent Wight’

‘Solent Wight’ is a softneck garlic adapted to British growing conditions.

It can produce bulbs that store well after proper curing.

‘Germidour’

‘Germidour’ is a popular softneck variety with attractive purple-tinted bulbs.

It’s commonly selected for autumn planting.

‘Cristo’

‘Cristo’ is another softneck garlic known for its strong flavour.

It’s worth considering if you enjoy cooking with home-grown garlic.

Hardneck Varieties

Hardneck garlic generally develops a stiff flowering stem.

Some varieties produce curling shoots known as garlic scapes.

These can be harvested while young and used in cooking.

Hardneck or Softneck: Which Is Better?

Both can produce good crops.

Softneck varieties are often preferred for longer storage.

Hardneck varieties may appeal to gardeners who enjoy growing different garlic types and harvesting scapes.

Check the supplier’s planting instructions, because varieties differ in cold requirements and seasonal suitability.

Should You Grow Supermarket Garlic?

Although supermarket garlic can sometimes sprout and grow, it may not be adapted to UK conditions.

There are also disease risks associated with planting garlic that hasn’t been supplied specifically for cultivation.

For a reliable harvest, buy healthy planting garlic from a reputable gardening supplier.

How to Grow Garlic in Pots – Step-by-Step Instructions

Now let’s get planting!

This is the method I’d recommend for anyone growing garlic in containers for the first time.

Step 1: Choose a Suitable Pot

Select a container at least 25 cm deep with adequate width for your chosen number of cloves.

Check that the drainage holes are clear.

Step 2: Choose a Sunny Position

Garlic grows best in full sun.

Place the container somewhere receiving plenty of direct sunlight, especially during spring and early summer.

Step 3: Fill with Compost

Fill the pot with suitable peat-free compost.

Leave a small gap beneath the rim to make watering easier.

Gently level the surface without pressing the compost down excessively.

Step 4: Separate Your Garlic Bulb

Carefully break the planting bulb apart into individual cloves.

Keep the protective papery skin around each clove wherever possible.

Step 5: Select Healthy Cloves

Choose firm cloves without visible damage, mould or rotting.

Avoid any cloves that feel soft.

Step 6: Make Planting Holes

Use your finger or a dibber.

Position holes around 15 cm apart.

The spacing is important because each clove needs to develop a new bulb.

Step 7: Plant Each Clove Correctly

Place the pointed end upwards.

The flatter base should face downwards.

As a general guide, cover the clove so its tip sits approximately 2.5 cm below the compost surface.

Follow your variety’s instructions if they recommend a different depth.

Step 8: Cover with Compost

Gently fill the planting holes.

Firm the compost lightly.

Don’t press down so hard that the growing medium becomes compacted.

Step 9: Water if Necessary

If the compost is dry, water carefully.

Allow excess water to drain away.

If the compost is already moist, avoid unnecessary watering.

Step 10: Place Outside

For suitable autumn varieties, position your pot outside in a sunny location.

Many garlic varieties benefit from exposure to cool winter conditions.

Step 11: Protect Against Disturbance

Birds occasionally pull out newly planted cloves.

If needed, use securely installed horticultural fleece or appropriate wildlife-safe protection until roots become established.

Step 12: Monitor Growth

Green shoots may emerge within weeks, although growth may be slower during cold weather.

Don’t worry if very little appears to happen over winter.

The cloves may be establishing roots underground.

Can You Grow Garlic in Pots Over Winter?

Yes.

Garlic is one of the crops that makes autumn and winter container gardening worthwhile.

Many varieties are hardy enough to remain outside throughout a typical UK winter.

However, plants in pots are exposed to different conditions from garlic planted directly into the ground.

Avoid Waterlogging

This is one of the biggest winter risks.

Containers can collect a considerable amount of rain.

Make sure drainage holes remain clear.

Raise Pots Off the Ground

Pot feet can help keep drainage holes unobstructed.

Protect from Severe Weather

During prolonged severe frost or strong winds, move containers into an appropriately sheltered position if necessary.

Don’t Keep Garlic in a Heated Room

Garlic grown for bulbs generally needs suitable seasonal conditions, including cold exposure for many varieties.

A permanently warm room isn’t ideal for ordinary autumn-planted garlic.

What About a Greenhouse?

An unheated greenhouse may protect containers from excessive winter rain.

However, check moisture regularly because the pots won’t receive natural rainfall.

Ventilation is important, too.

Can You Grow Garlic in a Polytunnel?

Yes.

A polytunnel can provide a useful sheltered growing environment.

However, don’t assume protected growing always produces better garlic.

You still need suitable winter temperatures, enough light, good ventilation and careful watering.

How Often Should You Water Garlic in Pots?

Watering is one of the most important parts of container growing.

Unlike garlic planted in the ground, pot-grown garlic has access to a limited amount of compost.

Autumn Watering

After planting, check moisture.

Natural rainfall may be sufficient.

Winter Watering

Garlic grows slowly during the coldest months.

The compost should remain reasonably moist without becoming saturated.

You may need very little additional water.

Spring Watering

As temperatures rise, plants produce stronger foliage.

Water requirements generally increase.

Check compost regularly during dry spells.

Summer Watering

Maintain suitable moisture while bulbs are developing.

Avoid allowing plants to suffer prolonged drought.

When Should You Stop Watering?

As garlic approaches maturity and the foliage begins naturally yellowing, reduce watering.

Don’t keep mature bulbs sitting in wet compost.

How Do You Know When a Pot Needs Water?

Insert a finger into the compost.

If the upper layer is dry, check slightly deeper before watering.

The aim is to keep the root zone adequately moist, not constantly saturated.

What Is the Best Feed for Garlic in Pots?

Garlic needs nutrients to produce healthy leaves and bulbs.

Because container compost has limited nutrient reserves, feeding may become important as the growing season progresses.

Do You Feed Immediately After Planting?

Not necessarily.

Many potting composts already contain some nutrients.

Check the compost packaging.

Feeding in Early Spring

As growth increases, a suitable balanced fertiliser may be beneficial.

Follow the manufacturer’s instructions.

Can You Use Chicken Manure Pellets?

Yes, they can supply nutrients.

However, chicken manure pellets may contain relatively high levels of nitrogen.

Don’t overapply them.

Is Tomato Feed Suitable for Garlic?

Some gardeners use liquid fertilisers intended for fruiting plants.

However, a tomato feed isn’t essential, and its nutrient balance may not be ideal for every stage of garlic growth.

Choose products appropriate for the crop and follow label directions.

When Should You Stop Feeding?

Avoid unnecessary nitrogen-rich applications as the bulbs approach maturity.

Healthy, balanced growth matters more than applying as much fertiliser as possible.

Gardening with Ben tip: Don’t try to force bigger garlic bulbs by constantly feeding your pots. Good light, sufficient root space, suitable moisture and the right variety are just as important.

How Long Does Garlic Take to Grow in Pots?

Garlic is a relatively slow-growing crop when planted during autumn.

A clove planted in October may not be ready to harvest until June or July the following year.

That means the container may be occupied for around eight or nine months.

October to December

Cloves establish roots.

Some green shoots may appear.

January to February

Growth often slows because of cold temperatures and short days.

March to April

Leaves become taller and more vigorous.

This is an important stage for supporting later bulb development.

May to June

Bulbs begin developing more rapidly under suitable conditions.

June to August

Depending on the variety and planting date, the crop may become ready for harvesting.

Different varieties mature at different times.

When Is Garlic in Pots Ready to Harvest?

Knowing when to harvest garlic can make the difference between well-developed bulbs and disappointing results.

Watch the Lower Leaves

As garlic matures, the lower leaves often begin turning yellow or brown.

This is a useful sign, but it isn’t the only one.

Yellow leaves can also result from disease, drought or waterlogging.

Check a Sample Bulb

Carefully lift a plant when you think the crop is approaching maturity.

Inspect the bulb.

You want healthy, well-developed cloves protected by suitable wrappers.

Don’t Harvest Too Early

If you lift garlic too soon, the bulbs may be small or poorly developed.

Don’t Leave It Too Late

If garlic remains in the compost long after reaching maturity, wrappers may deteriorate and cloves can begin separating.

Typical UK Harvesting Time

Many autumn-planted garlic varieties are ready during late spring or summer.

Use the variety’s guidance and the plant’s condition rather than relying entirely on a calendar date.

How to Harvest Garlic from Containers

Harvesting garlic from pots is relatively straightforward.

Step 1: Stop Excessive Watering

As harvest approaches, allow the compost to become less wet.

Step 2: Loosen the Compost

Use a hand fork or trowel.

Take care not to damage the bulbs.

Step 3: Lift the Garlic

Lift each plant carefully from underneath.

Avoid pulling hard on weak stems.

Step 4: Remove Loose Compost

Gently brush off loose material.

Step 5: Inspect the Bulbs

Check for signs of rot, damage or disease.

Step 6: Dry the Harvest

Place healthy bulbs in a sheltered, dry, well-ventilated position.

Avoid leaving them in heavy rain.

How to Dry and Store Home-Grown Garlic

After harvesting, garlic usually needs curing before storage.

Choose Somewhere Dry and Airy

A covered, well-ventilated area is ideal.

Protect bulbs from rain and excessive moisture.

Allow Several Weeks

Depending on temperature and humidity, curing commonly takes around two to four weeks.

Check the Bulbs

The necks and protective outer layers should feel dry.

Trim Once Cured

You can trim roots and stems as appropriate.

Suitable softneck garlic may also be braided.

Store in Breathable Containers

Use mesh bags, baskets or another well-ventilated storage method.

Avoid Sealed Plastic Bags

Trapped moisture can encourage deterioration.

Check Regularly

Remove any garlic showing mould or rotting.

The storage life will depend on variety, curing quality and storage conditions.

Why Is My Garlic Growing Leaves but No Bulbs?

This can be frustrating, especially after looking after plants for several months.

There are several possible reasons.

Insufficient Cold Exposure

Many garlic varieties need a period of cold to form separate cloves.

Not Enough Sunlight

Garlic requires plenty of light to support bulb development.

Pot Too Small

Restricted growing space can reduce performance.

Overcrowding

Plants positioned too closely together may produce smaller bulbs.

Incorrect Variety

Some garlic varieties aren’t well suited to UK growing conditions.

Planting Too Late

Garlic planted late may have insufficient time to develop properly.

Poor Nutrition or Moisture

Nutrient deficiencies, drought and waterlogging can all affect growth.

Before assuming the crop has failed, check the maturity stage.

Some garlic may simply need more growing time.

Common Garlic Problems in Containers

Yellow Leaves

Could indicate natural maturity, water stress, disease or nutrient problems.

Rotten Cloves

Often associated with excessive moisture, poor drainage or disease.

Small Bulbs

May result from overcrowding, drought, shade or poor growing conditions.

Garlic Rust

Orange-brown pustules may appear on garlic leaves.

Serious infections can reduce plant vigour.

Onion White Rot

White rot is a serious disease affecting garlic and other alliums.

Affected plants may yellow and die back, while the roots and base of the bulb decay.

The disease can persist in soil for many years.

Don’t reuse potentially contaminated compost for other alliums or spread it into unaffected beds.

Allium Leaf Miner

Larvae can feed inside the leaves and stems of garlic and other allium crops.

Appropriate fine-mesh protection may help exclude adults if fitted before egg-laying.

Onion Fly

Larvae can damage allium roots and bulbs.

Use healthy planting material and appropriate garden hygiene.

Ten Mistakes to Avoid When Growing Garlic in Pots

1. Using a pot that’s too shallow. Give garlic sufficient root space.
2. Planting too many cloves together. Aim for suitable spacing.
3. Choosing unsuitable garlic. Buy named varieties intended for planting.
4. Using heavy, poorly draining compost. Avoid prolonged saturation.
5. Growing garlic in deep shade. Choose a sunny position.
6. Overwatering during winter. Check moisture before watering.
7. Allowing pots to dry out in spring. Monitor compost as temperatures rise.
8. Applying excessive fertiliser. Balanced nutrition is better than constant feeding.
9. Moving autumn garlic into permanent indoor warmth. Many varieties need suitable cold exposure.
10. Harvesting too early or late. Check bulb development before lifting the crop.

What Can You Grow After Harvesting Garlic?

One advantage of container gardening is that you can reuse your growing space when a crop finishes.

Once your garlic has been harvested, there may still be enough of summer remaining to grow something else.

Depending on the date and conditions, consider:

• Lettuce.
• Rocket.
• Suitable salad leaves.
• Radishes.
• Other quick-growing seasonal crops.

Can You Reuse the Garlic Compost?

If your garlic was healthy, you may be able to refresh and reuse the compost.

Remove old roots and assess its structure.

Add nutrients if needed for the next crop.

However, don’t reuse compost from crops suspected of having serious soil-borne diseases such as onion white rot.

Month-by-Month Calendar for Growing Garlic in Pots in the UK

Month	What to do
January	Check drainage and protect containers during severe weather.
February	Plant suitable late-winter varieties if needed.
March	Watch for new growth and remove weeds.
April	Check watering and feeding requirements.
May	Monitor leaf health and developing bulbs.
June	Begin checking early varieties for maturity.
July	Harvest many autumn-planted garlic crops.
August	Cure and store harvested bulbs.
September	Prepare containers and purchase planting garlic.
October	Plant suitable autumn garlic varieties.
November	Continue autumn planting and check drainage.
December	Keep pots secure, sheltered where necessary and free from waterlogging.

Remember that planting and harvesting dates depend on local conditions and the variety.

Frequently Asked Questions About Growing Garlic in Pots

Can you grow garlic in pots in the UK?

Yes. Growing garlic in pots works well in the UK when you choose suitable varieties, adequate containers and a sunny position.

What is the best pot size for garlic?

Choose a container at least 25 cm deep, with enough width to provide approximately 15 cm between cloves.

How many garlic cloves can I plant in a 30 cm pot?

One or two cloves is a practical starting point, depending on the pot’s internal dimensions.

What is the best compost for garlic in pots?

Good-quality peat-free multipurpose compost or a suitable peat-free soil-based potting mix can work well.

When should I plant garlic in pots in the UK?

October and November are ideal for many autumn garlic varieties. Other suitable varieties can be planted in late winter or early spring.

Can garlic pots stay outside during winter?

Yes. Suitable garlic varieties usually tolerate British winter conditions, although containers must drain properly.

Can I grow garlic in a greenhouse?

Yes, particularly an unheated greenhouse, but appropriate cold exposure and good ventilation remain important.

Does garlic need full sun?

Garlic grows best in a sunny position, particularly during spring and early summer.

How deep do you plant garlic cloves in pots?

As a general guide, plant with the pointed tip around 2.5 cm below the compost surface.

How often should I water garlic in containers?

Water according to moisture levels and weather conditions. Check regularly during spring, but avoid waterlogged compost.

What is the best fertiliser for garlic in pots?

A suitable balanced fertiliser may help as compost nutrients become depleted. Follow the manufacturer’s instructions.

Can I plant supermarket garlic?

It may grow, but garlic sold specifically for planting is the more reliable choice and reduces avoidable disease risks.

How long does garlic take to grow in pots?

Autumn-planted garlic often takes around eight or nine months before it’s ready to harvest, depending on the variety.

Why is my garlic producing small bulbs?

Possible causes include overcrowding, insufficient sunlight, drought, poor nutrition or unsuitable cold exposure.

Can you grow elephant garlic in pots?

Yes, but elephant garlic needs larger containers and more growing space than ordinary garlic.

Can I grow garlic on a balcony?

Yes, provided the balcony receives sufficient sunlight and the containers can be positioned safely within any weight and building restrictions.

Can I use the same pot again next year?

Yes, but replace or refresh the growing medium as appropriate. Avoid replanting alliums into compost suspected of carrying serious allium diseases.

Final Thoughts: Growing Garlic in Pots Is Worth Trying

Growing garlic in pots is a fantastic way to enjoy home-grown vegetables, even if you’ve only got a small outdoor space.

You don’t need an allotment or a large vegetable garden.

With a suitable pot, healthy planting cloves, good-quality compost and a little care, you can produce your own garlic at home.

The biggest things to remember are to choose the right planting time, provide enough growing room and avoid waterlogging.

Garlic generally grows best outdoors, where suitable varieties benefit from natural winter conditions.

As spring arrives, keep an eye on compost moisture and make sure your plants have enough sunlight.

Then, when your bulbs are mature, carefully harvest them and allow them to cure before storing.

If you’ve never tried growing garlic in containers before, I’d definitely recommend giving it a go.

And once you’ve enjoyed your first successful harvest, you’ll probably want to grow a few more pots the following year.

Keep smiling, keep shining, keep gardening with Ben!