When to Plant Garlic in the UK – Autumn or Spring?

Knowing when to plant garlic in the UK is one of the most important things to get right if you want to grow large, healthy garlic bulbs.

Garlic is one of those fantastic vegetables that can be planted during autumn, left growing through winter and harvested the following summer.

But what happens if you forget to plant your garlic in October or November?

Can you still plant garlic in December, January or February?

And is it better to plant garlic during autumn or wait until spring?

These are questions many gardeners ask, especially when they’re growing garlic for the first time.

Here at Gardening with Ben, I love planting garlic and elephant garlic during autumn on the allotment.

When so many summer crops are coming to an end, it’s brilliant to start planting something that will grow through the colder months and give you another harvest the following year.

And garlic is perfect for this.

However, it’s important to understand that not every garlic variety should be planted at exactly the same time.

Some varieties are best planted in autumn, while others are suitable for late-winter or early-spring planting.

The correct timing also depends on your local weather, soil conditions and whether you’re growing garlic in the ground, in raised beds or in containers.

In this complete UK guide, I’ll explain the best months to plant garlic, the differences between autumn and spring planting, how winter cold affects bulb development and what to do if you’ve missed the traditional planting season.

We’ll also look at when to harvest garlic, common planting mistakes and how to get your cloves off to the best possible start.

What Is the Best Month to Plant Garlic in the UK?

For most traditional autumn-planting garlic varieties, October and November are excellent months to plant garlic in the UK.

Garlic planted during autumn can establish roots before the coldest winter weather arrives.

The plants then receive a period of cool temperatures, which helps many varieties develop properly divided bulbs.

As daylight increases and temperatures rise during spring, growth becomes more vigorous.

Eventually, the plant produces a new bulb underground.

This is why autumn-planted garlic is so popular with British allotment gardeners.

Can You Plant Garlic in December?

Yes.

Many suitable autumn garlic varieties can still be planted in December, provided the soil isn’t frozen or waterlogged.

Can You Plant Garlic in January or February?

Yes, some varieties are suitable for planting during late winter.

However, always check the variety’s requirements.

What About March?

Certain spring-planting varieties can be planted in March.

They may have a shorter growing season than autumn-planted garlic.

Is April Too Late?

April is later than ideal for most traditional garlic grown for mature bulbs in the UK.

Some suitable planting material may still grow, but results are less predictable and bulbs may remain small or undivided.

If planting very late, consider whether growing garlic greens would be a more realistic goal.

UK Garlic Planting Calendar: January to December

Here’s a practical month-by-month guide.

Month	Can you plant garlic?	Advice
January	Yes, selected varieties	Plant when conditions allow and check cold requirements.
February	Yes	Good for suitable late-winter and spring varieties.
March	Yes, selected varieties	Plant promptly; late planting may reduce bulb development.
April	Usually too late for most	Full-sized bulbs are less reliable.
May	Not recommended for normal bulb crops	Consider growing garlic greens instead.
June	Not recommended	Usually a harvesting period for established garlic.
July	Not recommended	Harvest and cure mature garlic crops.
August	Generally wait	Prepare soil and choose autumn planting stock.
September	Possible for specified early varieties	Follow the supplier’s planting window.
October	Excellent	Main autumn planting period.
November	Excellent	Main autumn planting period.
December	Good for suitable varieties	Avoid frozen or saturated ground.

Remember: This calendar is a guide. The planting instructions for your chosen garlic variety take priority over general monthly advice.

Why Is Autumn the Best Time to Plant Garlic?

Autumn planting gives garlic a long growing season.

This is particularly useful because garlic needs time to develop roots, foliage and eventually a mature bulb.

1. Garlic Has More Time to Establish

Cloves planted during autumn can begin producing roots before spring.

Although cold temperatures slow visible growth, the plant has already started its development.

2. Cold Weather Helps Bulb Formation

Many garlic varieties require a period of cool temperatures for proper bulb development.

This is an important reason autumn planting is recommended.

3. Plants Can Grow Strongly in Spring

Once temperatures rise and daylight increases, established garlic can begin producing stronger foliage.

4. Autumn Planting Makes Use of Empty Beds

After harvesting summer vegetables, you may have growing space available.

Garlic is a useful crop for keeping some of those beds productive.

5. Harvesting Can Begin Earlier

Depending on the variety and weather, autumn-planted garlic may be ready from late spring into summer.

Spring-planted garlic often matures later.

Why Does Garlic Need Cold Weather?

This is one of the most interesting parts of growing garlic.

Garlic responds to both temperature and day length.

For many varieties, exposure to cold temperatures encourages the development of properly divided bulbs.

The Royal Horticultural Society advises that most varieties benefit from approximately one or two months at temperatures between 0°C and 10°C.

What Happens Without Enough Cold?

Some garlic plants may grow leaves and roots but fail to develop a normal bulb containing several cloves.

Instead, they can produce a single large, rounded bulb.

This is often called a garlic round or solo bulb.

Are Garlic Rounds Edible?

Yes.

Healthy rounds from culinary garlic are edible.

They can also sometimes be replanted during the following autumn.

Does Every Variety Need the Same Amount of Cold?

No.

Different garlic varieties have different temperature and seasonal requirements.

Some are better suited to spring planting than others.

Is More Frost Always Better?

No.

Garlic benefits from suitable cold exposure, but severe freezing combined with poor drainage or unsuitable conditions can still cause damage.

The aim is to choose a variety suited to your climate rather than trying to expose plants to extreme frost.

Planting Garlic in October

October is a fantastic month for planting garlic.

If you’re preparing your allotment for winter, this is one of the jobs I’d recommend adding to your list.

Why October Works Well

The soil is often still workable.

There is usually enough moisture for roots to establish.

Plants receive natural cold exposure as winter approaches.

What Should You Do Before Planting?

Remove persistent weeds.

Prepare the planting area.

Check drainage.

Buy healthy garlic intended for cultivation.

Is Early October Better Than Late October?

Not necessarily.

Planting dates depend on the variety and growing conditions.

A suitable autumn variety planted in late October may perform extremely well.

Should You Feed Garlic Immediately?

If your soil has been prepared with appropriate organic matter and contains sufficient nutrients, additional feeding may not be needed straight away.

Avoid adding excessive fertiliser at planting.

Planting Garlic in November

November is another excellent month.

In fact, many gardeners choose November because temperatures are falling and garlic can begin receiving the cold exposure it needs.

Can You Plant During Cold Weather?

Yes, provided the soil is workable.

Avoid planting into frozen or saturated soil.

What If It’s Been Raining Constantly?

If your allotment soil is extremely wet, don’t force cloves into waterlogged ground.

Consider using raised beds or starting garlic in modules under cool protection.

Will Shoots Appear Before Christmas?

They might.

Some cloves sprout within weeks, while others remain less visible until later.

Both can be normal.

Should You Protect Newly Planted Garlic?

If birds disturb the cloves, suitable secure protection may help until roots establish.

Make sure any mesh or netting is installed safely and doesn’t trap wildlife.

Can You Plant Garlic in December?

Yes, December planting can still work.

However, soil conditions become particularly important.

Avoid Waterlogged Beds

Garlic doesn’t tolerate prolonged saturation well.

Cloves can rot if planted in persistently wet soil.

Avoid Frozen Ground

Wait for a suitable period when the soil is workable.

Use Suitable Varieties

Follow the supplier’s recommended planting dates.

What About Containers?

Large containers with good drainage can provide another way to grow garlic.

Keep pots in appropriate outdoor conditions rather than bringing autumn garlic into a permanently heated room.

Can You Plant Garlic in January?

Some garlic varieties can be planted in January.

However, this is not the ideal month for every variety.

Check the Planting Instructions

Look specifically for varieties suitable for late-winter or spring planting.

What If the Ground Is Frozen?

Wait until conditions improve.

Avoid damaging soil structure by digging during unsuitable weather.

Can You Start Garlic in Modules?

Yes.

Starting cloves in individual modules containing suitable compost can help where outdoor beds remain too wet.

Keep the modules in a cool, sheltered position, such as an unheated greenhouse or cold frame.

Should You Use a Heated Propagator?

For ordinary garlic intended for mature bulbs, a heated propagator is generally unnecessary.

Cold exposure is important for many varieties.

Planting Garlic in February

February can be a useful month for garlic planting, particularly if you’ve missed autumn.

However, choose a suitable variety.

Is February Too Late?

No.

Some garlic varieties are specifically recommended for late-winter or early-spring planting.

Will February-Planted Garlic Produce Bulbs?

Yes, suitable varieties can produce worthwhile bulbs if growing conditions are favourable.

Will the Bulbs Be Smaller?

They may be smaller than autumn-planted garlic, particularly if the crop doesn’t receive sufficient growing time or cold exposure.

However, results vary.

Where Should You Plant?

Choose a sunny, well-drained position.

If your ground is waterlogged, consider containers or modules.

Planting Garlic in March

March is generally towards the later end of the planting window for ordinary UK garlic grown for mature bulbs.

Nevertheless, suitable spring varieties can still be planted.

Should You Plant as Early as Possible?

Yes, once soil conditions are suitable and you’ve selected an appropriate variety.

Delaying unnecessarily can shorten the growing season.

Does March-Planted Garlic Need Feeding?

Garlic benefits from fertile soil, but additional feeding should be based on plant needs.

Follow the fertiliser manufacturer’s instructions.

How Important Is Watering?

As spring progresses, longer days and warmer weather increase water requirements.

Monitor the soil during dry spells.

What If Your Garlic Produces One Round?

That can happen if the variety or seasonal conditions aren’t suitable for normal clove development.

Healthy rounds can still be used in cooking.

Is It Worth Planting Garlic in April?

April is relatively late for planting ordinary garlic in the UK if your main goal is harvesting large, properly divided bulbs.

You may still get growth from suitable cloves, but the results are less reliable.

What Problems Can Occur?

The crop has less time to develop.

It may receive insufficient cold exposure.

Bulbs may remain small.

Some plants may produce a single round rather than a divided bulb.

Can You Grow Garlic Greens Instead?

Yes.

If you’ve missed the main planting period, you could grow garlic for its edible green shoots.

These have a mild garlic flavour and can be harvested much sooner than mature bulbs.

What Would I Recommend?

For a reliable crop of mature garlic bulbs, plan ahead for the following autumn.

Autumn vs Spring Garlic Planting: Which Is Better?

Both methods can work, but they have different advantages.

Autumn planting	Spring planting
Usually October–December	Usually late winter–early spring
Favoured for most traditional varieties	Requires suitable varieties
Provides a longer growing season	Shorter growing season
Natural winter cold supports bulb development	Cold exposure may be limited
Often produces good-sized bulbs	May produce smaller bulbs
Requires suitable winter drainage	Avoids some of the wettest winter soil conditions
Harvest often begins earlier	Harvest may be later

Which Would I Choose?

For most UK allotment gardeners, I’d recommend autumn planting.

It takes advantage of the natural seasons and gives the plants a long growing period.

However, if autumn conditions are unsuitable or you’ve missed the planting window, spring planting with an appropriate variety is a worthwhile alternative.

Hardneck vs Softneck Garlic: Does Planting Time Matter?

Garlic varieties are commonly divided into hardneck and softneck groups.

Hardneck Garlic

Hardneck garlic generally produces a firm central flowering stem.

Many hardneck varieties are well adapted to colder conditions.

They often produce relatively large cloves.

Softneck Garlic

Softneck varieties usually produce more cloves and often store well.

They are popular in UK gardens.

Do All Hardneck Varieties Need Autumn Planting?

Not every variety has identical requirements, but many benefit from winter cold.

Is Softneck Garlic Better for Spring?

Some softneck varieties are suitable for spring planting.

However, being softneck doesn’t automatically mean a variety should be planted in spring.

Check the named variety’s instructions.

What Are Some Popular UK Garlic Varieties?

Commonly available varieties include ‘Solent Wight’, ‘Germidour’, ‘Cristo’ and ‘Arno’.

Another variety, ‘Flavour’, is offered for late-winter or early-spring planting by some suppliers.

Always check the recommended season on the actual bulbs you purchase.

Does Garlic Planting Time Change Across the UK?

Yes.

Conditions vary between different parts of Britain.

Northern England and Yorkshire

Autumn planting works well for suitable garlic varieties.

However, colder temperatures and winter rain can affect when the ground is workable.

If you’re growing garlic on an allotment in Yorkshire, check drainage carefully.

Scotland

Some regions experience longer periods of frost or saturated ground.

Choose hardy varieties and make sure the growing area drains well.

Wales

High rainfall can be a challenge in some locations.

Raised beds or modules may be useful where soil remains waterlogged.

Southern England

Autumn planting is generally suitable, but mild weather and soil conditions can vary considerably.

Coastal Areas

Milder temperatures may allow later planting in some locations.

However, strong winds and excessive winter moisture can create other problems.

What Matters Most?

Your specific garden conditions are often more important than regional averages.

Choose suitable varieties and plant when the soil is ready.

Can You Plant Garlic in Raised Beds During Autumn?

Absolutely.

Raised beds can be ideal for autumn garlic.

They’re particularly useful if your normal garden soil is heavy and retains excessive water.

Prepare the Raised Bed

Remove weeds and finished crops.

Check that the bed drains adequately.

Add mature compost if needed.

Plant at the Correct Spacing

For ordinary garlic, allow approximately 15 cm between cloves.

Avoid Excessive Mulching

Mulch can be useful, but don’t bury developing shoots or create persistently wet conditions around the cloves.

Should You Cover Raised Beds During Winter?

Suitable garlic varieties usually don’t require special protection from normal winter cold.

Focus on drainage and protection from pests or disturbance where necessary.

Can You Plant Garlic in Pots at the Same Time?

Yes.

Garlic can be planted in containers during the same general seasons as garlic grown in the ground.

Choose a Large Enough Pot

Use a container at least 25 cm deep.

Allow Enough Space

Position cloves approximately 15 cm apart.

Use Suitable Compost

Choose good-quality peat-free potting compost with adequate drainage.

Keep Pots Outdoors

Suitable autumn-planted garlic generally benefits from outdoor seasonal temperatures.

Protect Against Waterlogging

Make sure drainage holes remain clear.

Raise the pots on feet if necessary.

What If You Have a Balcony?

A sufficiently sunny balcony can be a good place to grow garlic.

Make sure containers are secure and don’t exceed any weight restrictions.

How to Plant Garlic Correctly After Choosing the Date

Once you’ve decided when to plant, the actual planting process is straightforward.

Step 1: Buy Suitable Planting Garlic

Choose healthy, named varieties recommended for your intended planting season.

Step 2: Separate the Bulb

Break the bulb into individual cloves.

Keep their protective skins intact where possible.

Step 3: Prepare the Soil

Choose a sunny position.

Remove established weeds and ensure good drainage.

Step 4: Make Planting Holes

Use a dibber or trowel.

Step 5: Plant the Cloves

Place each clove with its pointed end upwards and flat base downwards.

Step 6: Plant at the Right Depth

As a general guide, position the pointed tip around 2.5 cm beneath the soil surface.

Follow the variety’s instructions where they differ.

Step 7: Space Correctly

Allow approximately 15 cm between cloves and 30 cm between rows.

Step 8: Cover the Cloves

Gently cover with soil.

Avoid excessive compaction.

Step 9: Water When Needed

If the ground is dry, water after planting.

If it’s already moist, extra water may not be necessary.

Step 10: Leave to Establish

Avoid repeatedly digging around the cloves.

Monitor the planting area for weeds and drainage problems.

What Happens to Garlic After Autumn Planting?

Garlic passes through several growing stages.

Root Development

Cloves begin producing roots beneath the soil.

Shoot Emergence

Green shoots appear when conditions are suitable.

Winter Growth

Growth slows, but the plant continues responding to cold temperatures.

Spring Leaf Growth

Longer days encourage stronger foliage.

Bulb Formation

Environmental conditions trigger the development of new bulbs.

Bulb Swelling

The bulbs grow as the plant continues photosynthesising.

Maturity

Lower leaves begin yellowing as the crop approaches harvest.

Harvesting

Mature bulbs are lifted, dried and stored.

When Will Garlic Be Ready to Harvest?

The harvesting date depends on when you planted and the variety.

October-Planted Garlic

Many autumn-planted crops are ready during late spring or summer, often June or July.

November-Planted Garlic

Harvesting commonly takes place in summer.

December-Planted Garlic

Suitable varieties may be ready during summer, depending on growing conditions.

February-Planted Garlic

Spring-planted garlic may mature later and sometimes produce smaller bulbs.

March-Planted Garlic

Harvesting may be later still, and full bulb development can be less predictable.

Don’t Rely Entirely on Dates

The best indicator is the condition of the plant and developing bulb.

How Do You Know When Garlic Is Ready?

As garlic approaches maturity, its lower leaves often begin turning yellow or brown.

However, yellow leaves aren’t always a sign of maturity.

Drought, waterlogging, nutrient problems and disease can cause similar symptoms.

Check a Sample Bulb

Carefully lift one plant.

Look for a well-developed bulb with protective outer wrappers.

Avoid Harvesting Too Early

Immature garlic may produce small bulbs that don’t store well.

Avoid Harvesting Too Late

Overmature garlic may split, and its protective wrappers can deteriorate.

What About Garlic Scapes?

Hardneck garlic may produce curling flower stems before harvest.

Removing developing scapes is common when you want to prioritise bulb development.

What If You Miss the Autumn Garlic Planting Season?

Don’t worry.

You still have options.

Option 1: Plant a Suitable Spring Variety

Purchase a named garlic variety recommended for late-winter or early-spring planting.

Option 2: Start in Modules

If the ground is too wet, start suitable garlic in modules under cool protection.

Option 3: Grow Garlic Greens

If it’s too late to reliably produce mature bulbs, consider growing garlic leaves for cooking.

Option 4: Plan for Next Autumn

Prepare your growing area during summer.

Order suitable bulbs in advance.

This can be particularly useful because popular planting garlic varieties may sell out.

Ten Common Garlic Planting Mistakes

1. Planting at the Wrong Time

Different varieties have different planting requirements.

2. Using Supermarket Garlic Without Considering the Risks

Supermarket garlic may not suit UK conditions and can introduce diseases.

3. Planting the Whole Bulb

Separate it into individual cloves for normal bulb production.

4. Planting into Waterlogged Soil

Excessive moisture can cause cloves to rot.

5. Planting Too Deeply

Follow the variety’s recommended depth.

6. Planting Too Closely Together

Crowded plants may produce smaller bulbs.

7. Choosing a Shady Position

Garlic generally grows best in full sun.

8. Applying Too Much Fertiliser

Excessive feeding doesn’t guarantee larger bulbs.

9. Assuming Winter Growth Has Stopped Completely

Important root and seasonal development may still be happening.

10. Expecting Late Spring-Planted Garlic to Match Every Autumn Crop

Later planting can reduce the growing time and suitable cold exposure available.

Frequently Asked Questions About When to Plant Garlic

What month is best for planting garlic in the UK?

October and November are excellent months for many autumn-planting garlic varieties.

Can I plant garlic in September?

Some varieties may be suitable for early planting, but October onwards is more typical. Check the supplier’s instructions.

Is October too early to plant garlic?

No. October is one of the main UK garlic planting months.

Can I plant garlic in November?

Yes. November is an excellent month for many autumn garlic varieties.

Can I plant garlic in December?

Yes, provided you choose a suitable variety and the soil isn’t frozen or waterlogged.

Is January too late for garlic?

Not necessarily. Some varieties are suitable for late-winter planting.

Can garlic be planted in February?

Yes. Choose varieties recommended for late-winter or spring planting.

Is March too late to plant garlic?

Some spring varieties can still be planted in March, although planting as early as suitable conditions allow is preferable.

Can I plant garlic in April?

It’s late for producing mature bulbs from most traditional UK garlic varieties. Results may be less reliable.

Can I plant garlic in May?

May isn’t recommended for normal mature bulb production. You could grow garlic greens instead.

Is autumn or spring better for garlic?

Autumn is generally best for most UK garlic varieties because it offers a longer growing season and suitable winter cold.

Does garlic need frost?

Many garlic varieties benefit from a period of cold, but they don’t necessarily need severe frost.

Can garlic stay outside during winter?

Yes. Suitable varieties are generally hardy and can remain outdoors in well-drained soil.

Should garlic be planted in full sun?

Yes. Garlic grows best in a sunny position.

Can garlic be planted in pots?

Yes. Choose sufficiently deep containers with good drainage.

Can you plant garlic in a greenhouse?

Yes, but many varieties still need suitable cold exposure to develop divided bulbs.

Should you water garlic after planting?

Water if the soil is dry. Avoid unnecessary watering when the ground is already moist.

How long does garlic take to grow?

Autumn-planted garlic commonly takes around seven to nine months before harvest, depending on variety and weather.

When is garlic harvested in the UK?

Many garlic crops are harvested during late spring and summer, commonly between June and August.

Can I plant garlic from my own harvest?

Yes, healthy, disease-free garlic may be saved for planting, although purchased planting stock from a reputable supplier is generally a sensible starting point.

Final Thoughts: When Should You Plant Garlic in the UK?

If you’re wondering when to plant garlic in the UK, my recommendation is simple.

For most traditional garlic varieties, autumn is the best planting season, particularly October and November.

Planting during autumn gives garlic plenty of time to establish roots and receive the cold temperatures many varieties need for good bulb formation.

However, if you miss the autumn planting season, suitable spring varieties can still produce a worthwhile harvest.

The key is choosing the right garlic for the time of year.

Don’t simply plant any bulb and expect identical results.

Check the variety, prepare your soil carefully and make sure the planting area drains properly.

If your allotment soil is extremely wet during winter, raised beds or starting garlic in modules can be useful alternatives.

And remember, growing garlic doesn’t have to be complicated.

With healthy cloves, suitable planting dates and a little care, you can enjoy harvesting your own garlic bulbs during summer.

It’s one of my favourite crops to grow because it gives you something productive to do during autumn and a delicious reward several months later.

So whether you’re planting garlic in October, November or choosing a suitable spring variety, make sure you give it the best possible start.

Keep smiling, keep shining, keep gardening with Ben!