Garlic

Sun

Full sun, ideally at least 6 hours of direct sunlight daily.

Water

Water regularly during active growth, allowing the surface to dry slightly between waterings. Reduce watering as the leaves yellow before harvest.

Soil

Fertile, loose, well-drained soil, ideally pH 6.0-7.5. Use raised beds where winter soil stays wet.

Height

1-3 ft (0.3-0.9 m), including scapes

Spread

0.3-0.5 ft (0.1-0.15 m)

Flowers

Early to midsummer; hardneck types may produce small whitish or pinkish flowers mixed with bulbils in a rounded head. Many cultivated types rarely flower.

Foliage

Upright, flat, narrow, green to grey-green leaves that yellow and die back as the bulbs mature.

Growth

Moderate; usually harvested 7-9 months after autumn planting, sooner from spring planting.

Care needed

Medium

• Deer resistant
• Cold hardy
• Low allergen
• Edible

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Moderate

Toughness

Fairly tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   0.5 ft (0.15 m)

2. After 1 year

   2 ft (0.6 m)

   full size

About 1 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Toxic

Growth rate

Moderate

• Plant healthy seed cloves pointed end up, about 6 in (15 cm) apart, with their tips roughly 1-2 in (2.5-5 cm) below the surface.
• Choose locally adapted stock: hardneck types generally suit cold winters, while suitable softneck types perform better in mild-winter districts.
• Keep soil evenly moist during leaf growth and bulb swelling, but never waterlogged.
• Work compost into the bed before planting; feed lightly with a nitrogen-rich fertiliser in early spring, stopping as bulbs begin to swell.
• Weed by hand to avoid damaging shallow roots, and mulch with clean straw in cold climates; thin the mulch if it keeps soil excessively wet.

Pruning. Cut hardneck scapes while they are young and tender, after they begin to curl, to favour bulb development. Leave healthy leaves intact until harvest, then trim the dried tops after curing.

Cut hardneck garlic’s flower stalks (scapes) while tender, when they begin to curl, usually a few weeks before the bulbs are ready. Harvest bulbs, usually in summer, when the lower three or four leaves have browned but several upper leaves remain green; check one bulb for plump cloves and intact papery skins.

Early autumn

Prepare a sunny, well-drained bed and obtain disease-free seed garlic suited to your climate.

Mid to late autumn

Plant cloves before the ground freezes; add a loose straw mulch in cold-winter areas.

Late winter to early spring

Plant spring-suitable varieties if autumn planting was missed, as soon as the soil is workable.

Spring

Weed, feed lightly and water during dry spells; loosen heavy mulch around emerging shoots.

Early summer

Harvest tender scapes from hardneck plants and stop nitrogen feeding as bulbs swell.

Mid to late summer

Lift a sample bulb when the lower leaves brown but several upper leaves remain green. Harvest mature bulbs and cure them in a dry, shaded, well-ventilated place for 2-4 weeks.

• Plant in straight rows in a potager for an orderly, upright contrast to leafy vegetables.
• Use small blocks among lettuce and beetroot in edible beds, leaving room to lift the bulbs without disturbing neighbouring plants.
• Grow in deep containers or raised beds on sunny patios where drainage can be controlled.
• Repeat short rows through herb beds for seasonal vertical foliage, with another crop ready to fill the gaps after harvest.

Garden styles it suits: Potager (kitchen garden), Edible landscape, Homestead, Cottage garden, Herb parterre and Small-space.

Plant it with: Lettuce, Beetroot, Carrots and Calendula.

Wildlife: Flowers, when present, can attract bees and other insects, but garlic is normally harvested or has its scapes removed before flowering. It is not a dependable flowering resource for pollinators.

• White rot: yellowing leaves and rotting bulbs with white fungal growth and tiny black resting bodies. Remove affected plants and surrounding soil carefully; do not compost them or grow alliums in contaminated ground, where the fungus can persist for many years.
• Leek rust: orange pustules on leaves, especially in damp weather. Improve spacing, avoid excess nitrogen and remove badly affected foliage; choose resistant varieties where available.
• Allium leaf miner: larvae tunnel through leaves and bulbs in affected regions. Use fine insect mesh before adult flies arrive and remove infested crop debris.
• Small or poorly divided bulbs: often caused by unsuitable varieties, late planting, crowding or insufficient winter chilling. Use locally proven stock, plant at the recommended season and maintain adequate spacing.

All parts, including bulbs, leaves and scapes, are toxic to cats, dogs and horses, whether raw, cooked or dried; ingestion can damage red blood cells and cause serious anaemia. Contact a veterinarian if a pet eats garlic. Garlic is not considered toxic to people in normal food amounts, though it can cause digestive irritation or allergic reactions.

• Elephant garlic (Allium ampeloprasum)

  A leek relative with much broader leaves, very large cloves and a milder flavour; it often forms small, hard cormels around the bulb base.

• Onion (Allium cepa)

  Usually has hollow, tubular leaves and a layered bulb rather than garlic's flat leaves and bulb divided into cloves.

• Garlic chives (Allium tuberosum)

  Forms persistent clumps of narrow, flat leaves with white, star-shaped flowers in late summer, rather than a substantial bulb divided into cloves.

Allium is the Latin name for garlic, sativum means cultivated or sown, and garlic comes from Old English words meaning spear-leek.

Propagation. Separate a healthy bulb into cloves shortly before planting, keeping each clove's papery skin intact. Save only sound bulbs from healthy plants; bulbils from some hardneck types can also be planted but usually need more than one growing season to produce a useful divided bulb.

Accepted botanical name

Allium sativum

In the US and Canada

Introduced in Canada and the lower 48 states.

Native range

Iran, Kazakhstan, Kirgizstan, Tadzhikistan, Turkmenistan and Uzbekistan.

Measured

Soil pH 7.5 to 8. Average height 48 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.