Garlic

Growing Conditions

Garlic requires a cold period to develop properly — it needs exposure to temperatures below 40°F for several weeks to initiate bulb formation. This is why it’s planted in fall. It overwinters as a clove in the ground and grows actively in spring. Full sun and well-draining soil are important; garlic rots in waterlogged conditions.

Cold climates (Zone 5 and colder): Plant 4–6 weeks before hard ground freeze — typically mid-October in Zone 5. Mulch heavily after planting with straw or leaves to insulate over winter.

Warm climates: Plant in late fall or early winter. Garlic can be grown in mild-winter climates but hardneck varieties perform better in cold climates; softneck types are better suited to mild winters.

Sowing & Planting

Break bulbs into individual cloves just before planting. Plant the largest cloves — they produce the largest bulbs. Set cloves 2 inches deep, pointed end up, 6 inches apart in rows 12 inches apart. In cold climates, mulch with 4–6 inches of straw after planting.

Care & Maintenance

Remove mulch in spring when shoots emerge. Water consistently in spring and early summer — garlic is actively bulbing and needs moisture. Stop watering 2–3 weeks before expected harvest to allow outer wrappers to dry. Hardneck varieties produce a curled flower stalk (scape) in late spring — remove it to direct energy into bulb development. Scapes are edible and flavorful.

Common Problems

Rot results from waterlogged soil or planting into wet beds — ensure good drainage. White rot is a persistent soilborne fungus with no cure; rotate garlic out of affected beds for 15–20 years. Thrips cause silvery streaking on leaves in dry conditions — usually not severe enough to affect yield. Rust appears as orange pustules on leaves in humid conditions — largely cosmetic.

Harvest

Harvest when the lower 3–4 leaves have died back but 5–6 green leaves remain. Each green leaf corresponds to a wrapper layer on the bulb — too early means underdeveloped bulbs, too late means few wrappers and poor storage life. Loosen soil with a fork before pulling.

Cure in a warm, dry, well-ventilated location for 3–4 weeks. Store cured bulbs in a cool, dry spot — softneck varieties store 9–12 months; hardneck types 4–6 months.

Varieties

Hardneck varieties (Rocambole, Porcelain, Purple Stripe) have superior flavor, produce scapes, and are better suited to cold climates. They store for 4–6 months. Softneck varieties (Artichoke, Silverskin) store longer (9–12 months), don’t produce scapes, and are the type typically sold in grocery stores. For Zone 5 growers focused on flavor, hardneck types are worth growing.