How to Grow Garlic: The Complete Beginner's Guide

Garlic (Allium sativum) is one of the easiest and most satisfying crops to grow, and autumn is the perfect time to plant it across Ireland and the UK. Unlike most vegetables, garlic is grown from individual cloves rather than seed, and a single bulb from the shop or your own harvest can multiply into a whole new crop the following summer.

This guide will walk you through how to choose and plant garlic cloves, care for plants over winter, and harvest a healthy crop of bulbs.

STEP 1: CHOOSING YOUR GARLIC

Garlic falls into two main types, and the one you choose affects flavour, storage life, and how it grows.

• Softneck garlic: Produces larger yields, stores for longer, and doesn't send up a flower stalk — a reliable choice for most gardens.

• Hardneck garlic: Produces fewer but often larger cloves with a stronger, more complex flavour, and sends up an edible flower stalk (scape) in early summer.

• Always plant seed garlic bought specifically for growing, or your own saved bulbs, rather than supermarket garlic, which is often treated to prevent sprouting.

STEP 2: PREPARING TO PLANT

Garlic needs a period of cold to trigger bulb formation, which is why it's planted in autumn rather than spring.

• Break bulbs into individual cloves just before planting, keeping the papery skin on each clove intact.

• Choose the largest, healthiest cloves for planting, as clove size directly affects the size of the bulb you'll harvest.

• Prepare a sunny bed with free-draining, fertile soil, working in well-rotted organic compost beforehand; garlic dislikes waterlogged ground.

STEP 3: PLANTING GARLIC CLOVES

Planting is simple and takes only minutes once the bed is ready.

• Plant cloves pointed end up, about 5cm deep and 15cm apart, in rows spaced around 30cm apart.

• Plant from October through to December in most of Ireland and the UK, ideally before the ground gets too cold and wet.

• Water in lightly after planting, then let autumn and winter rainfall take over.

STEP 4: OVERWINTERING AND CARE

Garlic is remarkably hardy and needs little attention through the colder months.

• Green shoots typically appear within a few weeks of planting and will continue slow growth through winter.

• Keep beds weed-free, as garlic doesn't compete well with weeds for nutrients and light.

• In very wet, heavy soil, consider planting in raised beds or ridges to improve drainage and prevent rot.

STEP 5: SPRING AND SUMMER CARE

• Feeding: Top-dress with organic compost or a balanced organic feed in early spring as growth picks up.

• Watering: Water during dry spells in spring, but reduce watering as harvest approaches to help bulbs cure properly.

• Scapes: If growing hardneck varieties, snip off the curly flower scapes in early summer once they appear — this redirects energy into bulb growth, and the scapes themselves are delicious sautéed.

• Companion planting: Garlic's strong scent helps deter aphids and other pests from nearby crops, making it a useful companion in a food forest or vegetable bed.

STEP 6: HARVESTING AND CURING

Garlic is ready to harvest in mid to late summer, typically June to August depending on variety and planting date.

• Watch for the lower leaves turning yellow and starting to die back, usually with 5-6 green leaves remaining, as your cue to harvest.

• Lift bulbs gently with a fork rather than pulling, to avoid bruising or splitting them.

• Cure bulbs by hanging or laying them somewhere warm, dry, and well-ventilated for 2-3 weeks before trimming and storing; properly cured garlic can keep for many months.

Once you've grown your own garlic, it's hard to go back — save your biggest bulbs each year to replant, and you'll never need to buy seed garlic again.