How to Sow and Grow Garlic: A Complete Guide
Garlic is usually grown from individual cloves rather than seed. It needs a long season and, for many varieties, a period of winter cold to divide into a full bulb. Healthy certified planting stock and well-drained soil are the foundations of a reliable crop.
Choosing garlic
Softneck garlic generally stores longest and suits milder regions. Hardneck garlic often tolerates cold well, produces flower stalks called scapes and has fewer, larger cloves. Choose locally adapted, disease-free bulbs sold for planting; supermarket garlic may be unsuitable for the climate or carry disease.
When to plant
Autumn planting gives the longest growing period and usually the largest bulbs. Plant from mid-autumn until early winter before the ground freezes solid. In very wet or severely cold areas, late winter to early spring planting is safer. Some varieties require chilling before spring planting, so follow the supplier’s guidance.
How to plant cloves
Separate bulbs immediately before planting and keep the papery skins intact. Plant the largest sound cloves with the pointed end uppermost, 5–7 cm deep and 10–15 cm apart, with rows 25–30 cm apart. Discard soft, damaged or mouldy cloves. Label different varieties.
Soil and containers
Choose full sun and fertile soil that drains freely in winter. Add mature compost before planting but avoid fresh manure. Heavy wet soil encourages rot; raised beds or modules may be better. Containers should be at least 20–25 cm deep with good drainage and enough width for correct spacing.
Watering, feeding and weeding
Keep beds weed-free because garlic competes poorly. Water during spring drought while bulbs enlarge, then stop or greatly reduce watering as lower leaves yellow. A balanced organic feed in early spring can support weak soil, but late nitrogen delays ripening. Mulch lightly without smothering emerging shoots.
Scapes and bulb development
Hardneck scapes can be cut after curling and eaten, allowing the plant to focus on the bulb. Do not remove healthy leaves. Bulbs form as days lengthen, so good leaf growth beforehand is essential.
Common problems
White rot: remove affected plants and soil around roots; do not grow alliums in contaminated ground for many years
Rust: improve airflow, avoid excess nitrogen and remove severely infected material
Allium leaf miner: use insect-proof mesh during local adult flight periods and dispose of infested plants safely
Bulbs rotting: improve drainage, use healthy stock and avoid overwatering near maturity
Single round bulbs: plant earlier next time or choose a variety with chilling requirements suited to the climate
Harvesting and storing
Lift garlic when several lower leaves have browned but upper leaves remain green. Test one bulb before lifting the row. Dry bulbs in a warm, airy, rain-free place out of harsh sun for two to four weeks. Store fully cured bulbs cool, dry and ventilated; use damaged or thick-necked bulbs first.
A reliable approach
Plant healthy adapted cloves into well-drained soil, keep them free from weeds and water only while leaves are actively growing. Harvest before every leaf dies so protective bulb wrappers remain intact.
