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How to Plant Garlic in Autumn

Introduction

Garlic is one of the easiest and most rewarding crops to grow in the UK. Planting in autumn is the traditional and most reliable method, allowing cloves to develop strong roots before winter and produce large, healthy bulbs the following summer. Whether you’re new to gardening or an experienced allotment grower, autumn garlic planting is simple, low-maintenance, and highly rewarding.

In this guide, we’ll show you how to plant garlic in autumn step by step, with tips for soil preparation, spacing, and aftercare, so you can enjoy a bumper harvest next year.

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Why Plant Garlic in Autumn?

• Stronger bulbs: Autumn planting gives cloves time to establish roots before winter.
• Bigger harvests: Chilling over winter helps bulbs split into cloves.
• Low maintenance: Once planted, garlic needs very little care.
• Earlier crops: Harvest is ready by early to mid-summer.
• Hardy crop: Garlic is well-suited to cold UK winters.

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Choosing the Right Garlic for Autumn Planting

Not all garlic is the same. For best results, choose varieties suited to autumn sowing.

Hardneck Garlic

• Strong flavour, fewer but larger cloves.
• Produces flower stems (scapes) that are edible.
• Ideal for cold winters but shorter storage life.
• Varieties: ‘Carcassonne Wight’, ‘Lautrec Wight’.

Softneck Garlic

• Milder flavour, more cloves per bulb.
• Stores for up to 9 months.
• Very reliable for UK growers.
• Varieties: ‘Solent Wight’, ‘Albigensian Wight’.

✅ Avoid supermarket garlic, as it may not be suitable for UK conditions and can carry disease.

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Preparing the Soil for Garlic

Garlic thrives in well-drained, fertile soil.

1. Choose a sunny spot — Garlic needs 6+ hours of sunlight daily.
2. Improve drainage — Raised beds or ridges are ideal in wet areas.
3. Add organic matter — Dig in compost or well-rotted manure.
4. Test the soil — Garlic prefers slightly acidic to neutral soil (pH 6.5–7).
5. Rake soil level — A fine tilth makes planting easier.

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Step-by-Step Guide: How to Plant Garlic in Autumn

Step 1: Separate the Bulbs

• Break a bulb into individual cloves just before planting.
• Use the biggest, healthiest cloves.
• Leave the papery skin on for protection.

Step 2: Mark Out Rows

• Rows should be 30cm (12in) apart.
• This allows good airflow and reduces disease.

Step 3: Plant the Cloves

• Plant cloves 15cm (6in) apart in the row.
• Push into soil with the pointed end facing up.
• Depth: 2–3cm below the surface for light soils, 5cm for heavier soils.

Step 4: Firm and Water

• Lightly firm the soil after planting.
• Water well if the soil is dry.

Step 5: Label Your Rows

• Always label varieties for easy identification at harvest.

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Caring for Garlic After Planting

Watering

• Garlic doesn’t like waterlogging.
• Water during dry spells, especially in spring as bulbs swell.

Feeding

• Apply a general fertiliser or blood, fish, and bone in early spring.
• Top-dress with sulphate of potash in March to boost bulb size.

Weeding

• Garlic hates competition — keep beds weed-free.
• Weed by hand to avoid damaging shallow roots.

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Protecting Garlic Over Winter

• Garlic is hardy, but young shoots benefit from protection.
• Cover with fleece or cloches in very cold or wet winters.
• Protect from birds that may pull up cloves.

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Common Problems When Planting Garlic

Rust

• Orange spots on leaves in spring/summer.
• Rotate crops and avoid overcrowding.
• Remove affected leaves to slow spread.

White Rot

• Fungal disease causing bulbs to rot.
• Avoid replanting garlic or onions in the same spot for several years.

Pests

• Birds may pull shoots — cover with netting or fleece.
• Slugs can damage young growth — use barriers or organic pellets.

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Harvesting Garlic

• Harvest from June to July when leaves turn yellow and start to flop.
• Lift bulbs carefully with a fork, don’t pull.
• Dry in a greenhouse, shed, or sunny spot for 2–3 weeks.
• Store in a cool, dry place for months of use.

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Conclusion

Planting garlic in autumn is one of the easiest and most rewarding gardening tasks. With minimal effort, you’ll set yourself up for a delicious summer harvest of fresh, homegrown garlic. By choosing the right varieties, preparing soil properly, and following simple planting steps, you can ensure strong, healthy bulbs that will last you well into the year.

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Top 10 Questions About Planting Garlic in Autumn

1. When is the best month to plant garlic in the UK?
October–November is ideal, though mild regions can plant into December.

2. Can I plant supermarket garlic?
Not recommended — it may not suit UK conditions and can carry disease.

3. How deep should garlic cloves be planted?
2–3cm deep in light soil, up to 5cm in heavier soil.

4. Should I water garlic over winter?
Only in dry spells — garlic dislikes waterlogging.

5. Do I need to mulch garlic in autumn?
Mulching helps in wet or cold areas, protecting cloves and suppressing weeds.

6. Which garlic grows best in the UK?
Softneck types like ‘Solent Wight’ are reliable, while hardnecks like ‘Carcassonne Wight’ suit colder regions.

7. How far apart should I plant garlic cloves?
15cm between cloves, 30cm between rows.

8. Can garlic survive frost?
Yes, garlic is very hardy, though fleece can help young shoots.

9. How long does garlic take to grow?
Around 8–9 months from planting to harvest.

10. When do I harvest autumn-planted garlic?
Usually June–July the following year, when leaves begin to yellow.

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