Can You Grow Garlic from Supermarket Cloves?

Introduction

Garlic is one of the most popular crops for home gardeners in the UK. It’s easy to grow, requires little space, and provides months of flavourful bulbs that store well. But many gardeners wonder: can you grow garlic from supermarket cloves?

It seems simple — break apart a bulb from the kitchen and plant it. Sometimes it works, but there are risks involved. In this article, we’ll explore whether supermarket garlic is suitable for planting, the potential problems you might face, and the best alternatives for growing healthy, reliable garlic crops.

The Short Answer

Yes, you can grow garlic from supermarket cloves, but it’s not always the best idea. Success depends on the source of the garlic, how it was treated, and your local growing conditions.

Why Gardeners Try Planting Supermarket Garlic

• Convenience – It’s already in your kitchen.
• Cost-effective – A cheap way to start growing garlic.
• Curiosity – Many gardeners want to test if it will sprout.
• Accessibility – Sometimes garden centres are sold out of seed garlic.

Problems with Growing Garlic from Supermarket Cloves

1. Disease Risk

Supermarket garlic is not certified disease-free. Planting it may introduce soil-borne diseases such as white rot, which can live in the soil for over 10 years and ruin future allium crops.

2. Unsuitable Varieties

Most supermarket garlic is imported (often from Spain or China) and may not be suited to the UK’s climate. It might struggle with cold winters or wet soils.

3. Treated to Prevent Sprouting

Some garlic bulbs are treated with growth inhibitors to extend shelf life, meaning cloves may fail to sprout when planted.

4. Poor Storage Life

Even if supermarket garlic grows, bulbs may not store as well as certified seed varieties.

When Supermarket Garlic Might Work

• If it’s organic, untreated, and already sprouting in your kitchen.
• If you’re planting it in pots or containers (so you don’t risk contaminating garden soil with disease).
• If you just want to experiment without relying on the harvest.

Best Alternative: Certified Seed Garlic

For reliable results, buy certified seed garlic from garden centres or specialist suppliers. Benefits include:

• Disease-free and safe for your soil.
• Bred for UK conditions.
• Wide choice of varieties (hardneck, softneck, early or late).
• Better flavour, storage, and yield.

Popular UK seed garlic varieties include:

• Solent Wight (softneck, great storage).
• Carcassonne Wight (hardneck, strong flavour).
• Cristo (spring garlic).
• Early Purple Wight (early harvest).

How to Plant Garlic (Supermarket or Seed Cloves)

Step 1: Prepare Soil

• Choose a sunny spot with free-draining soil.
• Improve soil with compost — avoid fresh manure.

Step 2: Break Bulbs into Cloves

• Select the largest, healthiest cloves.
• Discard small or damaged ones.

Step 3: Plant Correctly

• Pointy end up, flat end down.
• Depth: 2–3cm in autumn, 5–6cm in spring.
• Spacing: 10–15cm apart, rows 25–30cm apart.

Step 4: Water and Mulch

• Water lightly to settle soil.
• Mulch to retain moisture and suppress weeds.

Growing Garlic in Containers

If you want to experiment with supermarket garlic without risking your soil:

• Use a pot at least 20cm deep.
• Fill with compost mixed with grit for drainage.
• Space cloves 10cm apart.
• Water regularly in spring and early summer.

Tips for Success with Supermarket Garlic

• Choose organic bulbs if possible.
• Look for cloves that are already sprouting.
• Plant in containers, not in the ground, to avoid disease risk.
• Treat it as a trial crop — don’t rely on it for your main harvest.

What to Expect from Supermarket Garlic

• Some cloves will sprout, but not all.
• Bulbs may be smaller than those from seed garlic.
• Flavour and storage may be less reliable.

Still, for beginner gardeners, it can be a fun way to start growing garlic with minimal cost.

Conclusion

So, can you grow garlic from supermarket cloves? Yes, it’s possible — but it comes with risks. While you may get a harvest, the potential for disease, poor performance, and reduced storage makes it less reliable than planting certified seed garlic.

If you want to experiment, try growing supermarket garlic in pots. But if you’re serious about garlic growing and want big, flavourful bulbs that last through winter, invest in seed garlic. The small extra cost is worth it for healthier plants and more dependable results.

Top 10 Questions About Growing Garlic from Supermarket Cloves

1. Can I plant garlic bought from the supermarket?
Yes, but it’s less reliable and may carry diseases.

2. Will supermarket garlic sprout?
Sometimes — but treated bulbs may fail to sprout.

3. Is supermarket garlic safe to grow in the garden?
Not always. It may carry soil diseases like white rot, which can ruin future crops.

4. Can I grow supermarket garlic in pots?
Yes, this is the safest option to avoid contaminating soil.

5. Is organic supermarket garlic better for planting?
Yes, organic cloves are less likely to be treated with growth inhibitors.

6. What’s the risk of planting supermarket garlic in beds?
Introducing white rot, which can remain in soil for years.

7. Can I get a good harvest from supermarket garlic?
Possibly, but bulbs may be smaller and store less well than seed garlic.

8. What’s the difference between seed garlic and supermarket garlic?
Seed garlic is disease-free, climate-suited, and bred for high yields.

9. Is it worth trying supermarket garlic at all?
Yes, as an experiment in pots or containers.

10. What’s the best way to start growing garlic seriously?
Buy certified seed garlic suited to your region and plant in autumn or spring.