How to Grow Garlic: From Planting to Harvest (Complete Guide)

Garlic divides into two main types, and choosing the right one for your climate matters enormously.

**Hardneck garlic** (Allium sativum var. ophioscorodon): Produces a flower stalk ('scape') in early summer, which should be removed to direct energy to the bulb. Preferred by gourmet cooks for its complex, rich flavour and large, easy-to-peel cloves. Better suited to cold climates (USDA zones 3–6; UK most regions). Varieties: Rocambole (best flavour, doesn't store well), Purple Stripe, Porcelain (excellent storage, large cloves).

**Softneck garlic** (Allium sativum var. sativum): No flower stalk. Produces more cloves per head (often 10–20, but smaller). Longer shelf life (up to 12 months when cured). Better for warmer climates (zones 5–9). The type most commonly sold in supermarkets. Varieties: Silverskin (longest storing), Artichoke (mild flavour, widely adaptable).

**Recommendation:** If you live in a cold climate, grow a hardneck variety for better flavour — the shorter shelf life doesn't matter when you're harvesting fresh. In warm climates, softneck varieties will bulb up better.

**Timing:** In the UK and northern US, plant hardneck garlic in October–November, after the first frosts but before the ground freezes. In warmer climates, plant November–December. Garlic needs a cold period (vernalisation) of at least 4–6 weeks below 10°C to form distinct cloves — without this, you'll get single round bulbs ('rounds') instead of divided heads.

**Site:** Full sun (minimum 6 hours). Well-drained, fertile soil with a neutral pH (6.0–7.0). Garlic rots in waterlogged conditions — if your soil is heavy clay, raise beds or add grit.

**Planting:** Break heads into individual cloves the day before planting (this helps prevent fungal disease). Plant cloves pointed end up, 5cm deep, 15cm apart in rows 30cm apart. In containers, a 20-litre pot can accommodate 6–8 cloves.

**Soil preparation:** Incorporate well-rotted compost or manure 2–3 weeks before planting. Avoid fresh manure — it promotes leaf growth over bulb development and can cause disease.

Garlic is largely self-sufficient once established. Key care tasks:

**Watering:** Garlic needs consistent moisture during active growth (March–May). Water weekly in dry weather, increasing to twice weekly in warm spring conditions. Reduce watering significantly in June as leaves begin to yellow — this helps with bulb curing.

**Feeding:** Apply a balanced granular fertiliser in early spring when growth resumes. A second light feed of high-nitrogen fertiliser (such as chicken pellets) in April encourages leaf growth, which fuels bulb development.

**Removing scapes (hardneck varieties):** In June, hardneck garlic sends up a curling flower stalk. Cut or snap this off when it makes one complete curl — removing it directs the plant's energy into the bulb rather than seed production. Scapes are delicious — use them like mild garlic in stir-fries, pestos and omelettes.

**Weeding:** Garlic competes poorly with weeds. Keep beds clear, particularly in spring. A mulch of straw applied after planting helps suppress weeds and maintain soil moisture through winter.

**When to harvest:** Timing is critical. In the UK: mid-June to mid-July for hardneck; late July for softneck. In the US: June–July depending on latitude. The signal: when approximately 50% of the leaves have yellowed and died back, with 5–6 green leaves remaining. Do not wait until all leaves die back — the clove wrappers will split and storage life decreases dramatically.

Confirm readiness by digging up one test bulb. The cloves should be plump and well-formed, with papery skin between them.

**Harvesting:** Use a fork rather than pulling by the stem (which can damage the neck and reduce storage life). Loosen the soil around the bulb first, then lift gently.

**Curing:** This is what transforms freshly harvested garlic into the storable product we know. Lay or hang bulbs in a single layer in a warm (25–30°C), dry, well-ventilated space — a shed, greenhouse or dry barn. Cure for 3–4 weeks until the outer skins are papery and the neck is completely dry.

**Storage:** Once cured, store in mesh bags or braided strings in a cool (10–15°C), dark, dry location. Properly cured softneck garlic stores 6–12 months. Hardneck: 3–6 months.